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DIRAC STRUCTURE

  • Dirac structure
  • Geometric construct

    In mathematics a Dirac structure is a geometric structure generalizing both symplectic structures and Poisson structures, and having several applications

    Dirac structure

    Dirac_structure

  • Dirac equation
  • Relativistic quantum mechanical wave equation

    In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form, or including

    Dirac equation

    Dirac_equation

  • Dirac delta function
  • Generalized function whose value is zero everywhere except at zero

    In mathematical analysis, the Dirac delta function (or δ {\displaystyle {\boldsymbol {\delta }}} distribution), also known as the unit impulse, is a generalized

    Dirac delta function

    Dirac delta function

    Dirac_delta_function

  • Paul Dirac
  • British physicist (1902–1984)

    Paul Adrien Maurice Dirac (/dɪ.ˈræk/, dih-RAK; 8 August 1902 – 20 October 1984) was a British theoretical physicist who is considered to be one of the

    Paul Dirac

    Paul Dirac

    Paul_Dirac

  • Gamma matrices
  • Generators of the Clifford algebra for relativistic quantum mechanics

    \left\{\gamma ^{0},\gamma ^{1},\gamma ^{2},\gamma ^{3}\right\}\ ,} also called the Dirac matrices, are a set of conventional matrices with specific anticommutation

    Gamma matrices

    Gamma_matrices

  • Dirac cone
  • Quantum effect in some non-metals

    In physics, Dirac cones are features that occur in some electronic band structures that describe unusual electron transport properties of materials like

    Dirac cone

    Dirac cone

    Dirac_cone

  • Dirac large numbers hypothesis
  • Hypothesis relating age of the universe to physical constants

    The Dirac large numbers hypothesis (LNH) is an observation made by Paul Dirac in 1937 relating ratios of size scales in the Universe to that of force

    Dirac large numbers hypothesis

    Dirac large numbers hypothesis

    Dirac_large_numbers_hypothesis

  • Dirac matter
  • Condensed matter system

    of Dirac matter differ significantly in nature. However, all examples of Dirac matter are unified by similarities within the algebraic structure of an

    Dirac matter

    Dirac_matter

  • Courant algebroid
  • Concept in differential geometry

    product of split signature, a generalized complex structure L → M {\displaystyle L\to M} is a Dirac structure in the complexified Courant algebroid with the

    Courant algebroid

    Courant_algebroid

  • Dirac sea
  • Theoretical model of the vacuum

    The Dirac sea is a theoretical model of the electron vacuum as an infinite sea of electrons with negative energy. It was first postulated by the British

    Dirac sea

    Dirac sea

    Dirac_sea

  • Fine-structure constant
  • Dimensionless number that quantifies the strength of the electromagnetic interaction

    the splitting or fine structure of the hydrogenic spectral lines. This constant was not seen as significant until Paul Dirac's linear relativistic wave

    Fine-structure constant

    Fine-structure constant

    Fine-structure_constant

  • Planck constant
  • Physical constant in quantum mechanics

    and Dirac again introduced special symbols for it: K {\textstyle K} in the case of Schrödinger, and h {\textstyle h} in the case of Dirac. Dirac continued

    Planck constant

    Planck_constant

  • Courant bracket
  • It is a generalization of the Lie bracket from an operation on the tangent bundle

    bracket. Dirac structures include as special cases symplectic structures, Poisson structures and foliated geometries. A generalized complex structure is defined

    Courant bracket

    Courant_bracket

  • Dirac Medal (ICTP)
  • Prize awarded by the International Centre for Theoretical Physics

    The Dirac Medal of the ICTP is given each year by the International Centre for Theoretical Physics (ICTP) in honour of physicist Paul Dirac. The award

    Dirac Medal (ICTP)

    Dirac_Medal_(ICTP)

  • Dirac (software)
  • Ab initio quantum chemistry program

    Dirac (named after Paul Dirac; own notation DIRAC) is a relativistic ab initio quantum chemistry program. The full name is Program for Atomic and Molecular

    Dirac (software)

    Dirac (software)

    Dirac_(software)

  • Magnetic monopole
  • Hypothetical particle with one magnetic pole

    magnetic charge started with a paper by the physicist Paul Dirac in 1931. In this paper, Dirac showed that if any magnetic monopoles exist in the universe

    Magnetic monopole

    Magnetic monopole

    Magnetic_monopole

  • Bra–ket notation
  • Notation for quantum states

    Bra–ket notation or Dirac notation is a mathematical notation for linear algebra and linear operators on complex vector spaces together with their dual

    Bra–ket notation

    Bra–ket_notation

  • Schrödinger equation
  • Description of a quantum-mechanical system

    unviable. This was fixed by Dirac by taking the so-called square root of the Klein–Gordon operator and in turn introducing Dirac matrices. In a modern context

    Schrödinger equation

    Schrödinger_equation

  • Poisson manifold
  • Mathematical structure in differential geometry

    ):=\{\pi (\alpha ,\cdot )+\alpha \}\subset TM\oplus T^{*}M} defines a Dirac structure, i.e. a Lagrangian subbundle of T M ⊕ T ∗ M {\displaystyle TM\oplus

    Poisson manifold

    Poisson_manifold

  • Dirac operator
  • First-order differential linear operator on spinor bundle, whose square is the Laplacian

    In mathematics and in quantum mechanics, a Dirac operator is a first-order differential operator that is a formal square root, or half-iterate, of a second-order

    Dirac operator

    Dirac_operator

  • Dirac–von Neumann axioms
  • Formulation of quantum mechanics on a Hilbert Space

    In mathematical physics, the Dirac–von Neumann axioms give a mathematical formulation of quantum mechanics in terms of operators on a Hilbert space. They

    Dirac–von Neumann axioms

    Dirac–von_Neumann_axioms

  • Dirac spinor
  • Mathematical description of fermions

    In physics, and specifically in quantum field theory, a Dirac spinor is a mathematical construction that is used to describe some of the fundamental particles

    Dirac spinor

    Dirac_spinor

  • Dirac spectrum
  • Spectrum of eigenvalues

    mathematics, a Dirac spectrum, named after Paul Dirac, is the spectrum of eigenvalues of a Dirac operator on a Riemannian manifold with a spin structure. The isospectral

    Dirac spectrum

    Dirac_spectrum

  • Fine structure
  • Details in the emission spectrum of an atom

    can also be obtained from the non-relativistic limit of the Dirac equation, since Dirac's theory naturally incorporates relativity and spin interactions

    Fine structure

    Fine structure

    Fine_structure

  • Electronic band structure
  • Describes the range of energies of an electron within the solid

    In solid-state physics, the electronic band structure (or simply band structure) of a solid describes the range of energy levels that electrons may have

    Electronic band structure

    Electronic_band_structure

  • Spin structure
  • Concept in differential geometry

    as the index of a Dirac operator – a Dirac operator is a square root of a second order operator, and exists due to the spin structure being a "square root"

    Spin structure

    Spin_structure

  • Semi-Dirac fermion
  • Class of fermionic quasiparticles

    exotic electronic structure can emerge at the critical point of a topological phase transition from semimetal to insulator wherein two Dirac cones coalesce

    Semi-Dirac fermion

    Semi-Dirac_fermion

  • Fermion
  • Type of subatomic particle

    particle physics, a fermion is a subatomic particle that follows Fermi–Dirac statistics. Fermions have a half-integer spin (spin ⁠1/2⁠, spin ⁠3/2⁠, etc

    Fermion

    Fermion

    Fermion

  • Dirac–Kähler equation
  • Geometric analogue of the Dirac equation

    geometric structure gives the equation a natural discretization that is equivalent to the staggered fermion formalism in lattice field theory, making Dirac–Kähler

    Dirac–Kähler equation

    Dirac–Kähler_equation

  • Majorana fermion
  • Fermion that is its own antiparticle

    by Ettore Majorana in 1937. The term is sometimes used in opposition to Dirac fermion, which describes fermions that are not their own antiparticles.

    Majorana fermion

    Majorana fermion

    Majorana_fermion

  • Hyperfine structure
  • Type of structure in atomic physics

    difficulty by working with the relativistic Dirac wave equation, according to which the mediating field for the Dirac spinors is the four-vector potential (V

    Hyperfine structure

    Hyperfine structure

    Hyperfine_structure

  • Erwin Schrödinger
  • Austrian physicist (1887–1961)

    entanglement" in 1935. Schrödinger shared the 1933 Nobel Prize in Physics with Paul Dirac "for the discovery of new productive forms of atomic theory". In addition

    Erwin Schrödinger

    Erwin Schrödinger

    Erwin_Schrödinger

  • Graphene
  • Hexagonal lattice made of carbon atoms

    understanding the electronic properties of 3D graphite. The emergent massless Dirac equation was separately pointed out in 1984 by Gordon Walter Semenoff, and

    Graphene

    Graphene

    Graphene

  • Matter
  • Something that has mass and volume

    of matter. In particle physics, fermions are particles that obey Fermi–Dirac statistics. Fermions can be elementary, like the electron—or composite,

    Matter

    Matter

    Matter

  • Clifford analysis
  • is the study of Dirac operators, and Dirac type operators in analysis and geometry, together with their applications. Examples of Dirac type operators

    Clifford analysis

    Clifford_analysis

  • Nonlinear Dirac equation
  • Dirac equation for self-interacting fermions

    notation. In quantum field theory, the nonlinear Dirac equation is a model of self-interacting Dirac fermions. This model is widely considered in quantum

    Nonlinear Dirac equation

    Nonlinear Dirac equation

    Nonlinear_Dirac_equation

  • Antimatter
  • Material composed of antiparticles

    The modern theory of antimatter began in 1928, with a paper by Paul Dirac. Dirac realised that his relativistic version of the Schrödinger wave equation

    Antimatter

    Antimatter

    Antimatter

  • Quasi Fermi level
  • Term used in quantum mechanics

    function of the electrons at the energy level of E is presented by a Fermi–Dirac distribution function. In this case the Fermi level is defined as the level

    Quasi Fermi level

    Quasi_Fermi_level

  • Quantum chemistry
  • Chemistry based on quantum physics

    quantum chemical problem is usually solving the Schrödinger equation (or Dirac equation in relativistic quantum chemistry) with the electronic molecular

    Quantum chemistry

    Quantum chemistry

    Quantum_chemistry

  • Electronic properties of graphene
  • Graphene is a semimetal whose conduction and valence bands meet at the Dirac points, which are six locations in momentum space, the vertices of its hexagonal

    Electronic properties of graphene

    Electronic properties of graphene

    Electronic_properties_of_graphene

  • Quantum mechanics
  • Description of physical properties at the atomic and subatomic scale

    mid-1920s by Niels Bohr, Erwin Schrödinger, Werner Heisenberg, Max Born, Paul Dirac and others. The modern theory is formulated in various specially developed

    Quantum mechanics

    Quantum mechanics

    Quantum_mechanics

  • Electron magnetic moment
  • Spin of an electron

    from the Dirac equation, a fundamental equation connecting the electron's spin with its electromagnetic properties. Reduction of the Dirac equation for

    Electron magnetic moment

    Electron_magnetic_moment

  • Two-body Dirac equations
  • Quantum field theory equations

    context of Dirac's constraint dynamics and relativistic mechanics and quantum mechanics. Their structures, unlike the more familiar two-body Dirac equation

    Two-body Dirac equations

    Two-body Dirac equations

    Two-body_Dirac_equations

  • Relativistic quantum mechanics
  • Quantum mechanics taking into account particles near or at the speed of light

    spin-1/2 fermions, fine structure, and quantum dynamics of charged particles in electromagnetic fields. The key result is the Dirac equation, from which

    Relativistic quantum mechanics

    Relativistic_quantum_mechanics

  • MOSFET
  • Type of field-effect transistor

    more accurate model considers the effect of thermal energy on the Fermi–Dirac distribution of electron energies which allow some of the more energetic

    MOSFET

    MOSFET

    MOSFET

  • Structure formation
  • Astrophysical models for the formation of galaxies and clusters of galaxies

    , where δ ( 3 ) {\displaystyle \delta ^{(3)}} is the three-dimensional Dirac delta function and k = | k | {\displaystyle k=|\mathbf {k} |} is the length

    Structure formation

    Structure formation

    Structure_formation

  • Fermi level
  • Quantity in solid state thermodynamics

    it generally provides correct results when applied correctly. The Fermi–Dirac distribution, f ( ϵ ) {\displaystyle f(\epsilon )} , gives the probability

    Fermi level

    Fermi level

    Fermi_level

  • World Association of Theoretical and Computational Chemists
  • Association of chemists

    Medal to one "outstanding theoretical and computational chemist", and the Dirac Medal to one "outstanding theoretical and computational chemist under the

    World Association of Theoretical and Computational Chemists

    World_Association_of_Theoretical_and_Computational_Chemists

  • Dirac Medal (IOP)
  • Prize awarded by the Institute of Physics

    The Paul Dirac Medal and Prize is a gold medal awarded annually by the Institute of Physics (Britain's and Ireland's main professional body for physicists)

    Dirac Medal (IOP)

    Dirac_Medal_(IOP)

  • Photon
  • Elementary particle or quantum of light

    numbers) are zero. Also, photons obey Bose–Einstein statistics, and not Fermi–Dirac statistics. That is, they do not obey the Pauli exclusion principle, and

    Photon

    Photon

  • Graphyne
  • Allotrope of carbon

    specific applications owing to its particular energy structure, namely direction-dependent Dirac cones. The directional dependency of 6,6,12-graphyne

    Graphyne

    Graphyne

    Graphyne

  • Unified field theory
  • Field theory in physics that aims to unify the fundamental forces and particles

    field theory. By 1930 Einstein had already considered the Einstein-Maxwell–Dirac System [Dongen]. This system is (heuristically) the super-classical [Varadarajan]

    Unified field theory

    Unified_field_theory

  • Electron
  • Elementary particle with negative charge

    In 1928, building on Wolfgang Pauli's work, Paul Dirac produced a model of the electron – the Dirac equation, consistent with relativity theory, by applying

    Electron

    Electron

    Electron

  • Sylvester–Gallai theorem
  • Existence of a line through two points

    proving that t 2 ( n ) ≥ n {\displaystyle t_{2}(n)\geq {\sqrt {n}}} . Gabriel Dirac (1951) conjectured that t 2 ≥ ⌊ n / 2 ⌋ {\displaystyle t_{2}\geq \lfloor

    Sylvester–Gallai theorem

    Sylvester–Gallai theorem

    Sylvester–Gallai_theorem

  • Zero-point energy
  • Lowest possible energy of a quantum system or field

    and others, Paul Dirac's theory of emission and absorption (1927) was the first application of the quantum theory of radiation. Dirac's work was seen as

    Zero-point energy

    Zero-point energy

    Zero-point_energy

  • Structure factor
  • Mathematical description in crystallography

    static structure factor (or structure factor for short) is a mathematical description of how a material scatters incident radiation. The structure factor

    Structure factor

    Structure_factor

  • Generalized complex structure
  • Property of a differential manifold that includes complex structures

    generalized complex structure is a property of a differential manifold that includes as special cases a complex structure and a symplectic structure. Generalized

    Generalized complex structure

    Generalized_complex_structure

  • Quantum field theory
  • Theoretical framework in physics

    Louis de Broglie, Werner Heisenberg, Max Born, Erwin Schrödinger, Paul Dirac, and Wolfgang Pauli. In the same year as his paper on the photoelectric

    Quantum field theory

    Quantum field theory

    Quantum_field_theory

  • Fermion doubling
  • Putting fermions on a lattice with chiral symmetry results in more fermions than expected

    resulting in more fermionic states than expected. For the naively discretized Dirac fermions in d {\displaystyle d} Euclidean dimensions, each fermionic field

    Fermion doubling

    Fermion_doubling

  • C-symmetry
  • Symmetry of physical laws under a charge-conjugation transformation

    important equations and theoretical systems, including the Dirac equation and the structure of quantum field theory. The various fundamental particles

    C-symmetry

    C-symmetry

  • Canonical quantization
  • Process in quantum mechanical theories

    Poisson brackets, a structure which is only partially preserved in canonical quantization. This method was further used by Paul Dirac in the context of

    Canonical quantization

    Canonical quantization

    Canonical_quantization

  • Wasp (novel)
  • 1957 novel by Eric Frank Russell

    mockingly registers the rebel organisation Dirac Angestun Gesept as a legitimate organisation: Title of organization: Dirac Angestun Gesept. Purpose of organization:

    Wasp (novel)

    Wasp_(novel)

  • Fermionic condensate
  • State of matter

    A fermionic condensate (or Fermi–Dirac condensate) is a superfluid phase formed by fermionic particles at low temperatures. It is closely related to the

    Fermionic condensate

    Fermionic condensate

    Fermionic_condensate

  • Spinor bundle
  • Geometric structure

    (2000), Dirac Operators in Riemannian Geometry, American Mathematical Society, ISBN 978-0-8218-2055-1 page 53 Friedrich, Thomas (2000), Dirac Operators

    Spinor bundle

    Spinor_bundle

  • Dirac bracket
  • Quantization method for constrained Hamiltonian systems with second-class constraints

    The Dirac bracket is a generalization of the Poisson bracket developed by Paul Dirac to treat classical systems with second class constraints in Hamiltonian

    Dirac bracket

    Dirac_bracket

  • Hyperkähler manifold
  • Type of Riemannian manifold

    ) {\displaystyle (M,g)} endowed with three integrable almost complex structures I , J , K {\displaystyle I,J,K} that are Kähler with respect to the Riemannian

    Hyperkähler manifold

    Hyperkähler_manifold

  • Castigliano's method
  • Theorems describing elastic materials

    energy), i = 0 , 1 , 2 , 3 {\displaystyle i=0,1,2,3} , is the index of the Dirac delta (single force, i = 0 {\displaystyle i=0} ) and n = 1 , 2 , 3 {\displaystyle

    Castigliano's method

    Castigliano's_method

  • Metaplectic structure
  • Symplectic Dirac Operators, Springer-Verlag, ISBN 978-3-540-33420-0 page 35 M. Forger, H. Hess (1979). "Universal metaplectic structures and geometric

    Metaplectic structure

    Metaplectic_structure

  • Density functional theory
  • Computational quantum mechanical modelling method to investigate electronic structure

    principle. An exchange-energy functional was added by Paul Dirac in 1928. However, the Thomas–Fermi–Dirac theory remained rather inaccurate for most applications

    Density functional theory

    Density_functional_theory

  • Extended periodic table
  • Periodic table of the elements with eight or more periods

    the relativistic Dirac equation runs into problems with electron orbitals at Z > 1/α ≈ 137.036 (the reciprocal of the fine-structure constant), suggesting

    Extended periodic table

    Extended periodic table

    Extended_periodic_table

  • Point (geometry)
  • Fundamental object of geometry

    electromagnetism, where electrons are idealized as points with non-zero charge). The Dirac delta function, or δ function, is (informally) a generalized function on

    Point (geometry)

    Point (geometry)

    Point_(geometry)

  • Structure tensor
  • Tensor related to gradients

    that the structure tensor S w ( p ) {\displaystyle S_{w}(p)} cannot be factored in this way in general except if w {\displaystyle w} is a Dirac delta function

    Structure tensor

    Structure_tensor

  • David Deutsch
  • British theoretical physicist (born 1953)

    awarded the Dirac Prize of the Institute of Physics in 1998, and the Edge of Computation Science Prize in 2005. In 2017, he received the Dirac Medal of the

    David Deutsch

    David Deutsch

    David_Deutsch

  • Wave function
  • Mathematical description of quantum state

    correspond to the spin +1/2 and −1/2 states of the fermion. Soon after in 1928, Dirac found an equation from the first successful unification of special relativity

    Wave function

    Wave function

    Wave_function

  • Wolfgang Pauli
  • Austrian physicist (1900–1958)

    sometimes said to have influenced Paul Dirac in his creation of the Dirac equation for the relativistic electron, though Dirac said that he invented these same

    Wolfgang Pauli

    Wolfgang Pauli

    Wolfgang_Pauli

  • Periodic table
  • Tabular arrangement of the chemical elements

    Chemistry. Structure and Bonding. 21: 89–144. doi:10.1007/BFb0116498. ISBN 978-3-540-07109-9. Retrieved 4 October 2013. Fricke, Burkhard (1977). "Dirac–Fock–Slater

    Periodic table

    Periodic table

    Periodic_table

  • Semiconductor
  • Material of moderate electrical conductivity

    only if its energy is near the Fermi level[citation needed] (see Fermi–Dirac statistics). High conductivity in a material comes from it having many partially

    Semiconductor

    Semiconductor

  • Superposition principle
  • Fundamental principle of physics

    state is a ray in projective Hilbert space, not a vector. According to Dirac: "if the ket vector corresponding to a state is multiplied by any complex

    Superposition principle

    Superposition principle

    Superposition_principle

  • Kagome metal
  • Type of ferromagnetic quantum material

    Japanese basket-weaving. This geometry induces a flat electronic band structure with Dirac crossings, in which the low-energy electron dynamics correlate strongly

    Kagome metal

    Kagome_metal

  • Solvay Conference
  • Belgium academic gatherings since 1911

    theory were at this Solvay Conference, including Bohr, Born, de Broglie, Dirac, Heisenberg, Pauli, Planck, Lorentz, Compton, Ehrenfest, and Schrödinger

    Solvay Conference

    Solvay Conference

    Solvay_Conference

  • Physics
  • Scientific field of study

    would come to be pioneered by Werner Heisenberg, Erwin Schrödinger and Paul Dirac. From this early work, and work in related fields, the Standard Model of

    Physics

    Physics

  • Variable speed of light
  • Non-mainstream theory in physics

    theorem. In 1937, Paul Dirac and others began investigating the consequences of natural constants changing with time. For example, Dirac proposed a change

    Variable speed of light

    Variable_speed_of_light

  • Hydrogen atom
  • Atom of the element hydrogen

    correct expression for the fine structure of hydrogen spectra (which happens to be exactly the same as in the most elaborate Dirac theory). However, some observed

    Hydrogen atom

    Hydrogen atom

    Hydrogen_atom

  • Ralph Fowler
  • British mathematical physicist (1889–1944)

    Chandrasekhar, Paul Dirac, Homi J. Bhabha, and Sir William McCrea. It was Fowler who introduced Dirac to quantum theory in 1923. Fowler also put Dirac and Werner

    Ralph Fowler

    Ralph Fowler

    Ralph_Fowler

  • Kähler manifold
  • Manifold with Riemannian, complex and symplectic structure

    manifold with three mutually compatible structures: a complex structure, a Riemannian structure, and a symplectic structure. The concept was first studied by

    Kähler manifold

    Kähler_manifold

  • Path-integral formulation
  • Formulation of quantum mechanics

    Demichev 2001. Dirac 1933. Van Vleck 1928. Bernstein, Jeremy (2010-04-20). "Another Dirac". arXiv:1004.3578 [physics.hist-ph]. Feynman 1948. Dirac 1933 Klauber

    Path-integral formulation

    Path-integral_formulation

  • Quaternion
  • Four-dimensional number system

    {\displaystyle \mathbb {H} ^{\otimes 2}\otimes _{\mathbb {R} }\mathbb {C} } (Dirac algebra). A quaternion is an expression of the form a + b i + c j + d k

    Quaternion

    Quaternion

    Quaternion

  • Correspondence principle
  • Physics principle formulated by Niels Bohr

    classical–quantum correspondence. Dirac connected the structures of classical mechanics known as Poisson brackets to analogous structures of quantum mechanics known

    Correspondence principle

    Correspondence_principle

  • Spinc structure
  • Special tangential structure

    spinc structure defines two complex plane bundles, which can be used to describe negative and positive chirality of spinors, for example in the Dirac equation

    Spinc structure

    Spinc_structure

  • Bohr–Sommerfeld model
  • Extension of the Bohr model

    \alpha } is the fine-structure constant. This solution (using substitutions for quantum numbers) is equivalent to the solution of the Dirac equation. Nevertheless

    Bohr–Sommerfeld model

    Bohr–Sommerfeld model

    Bohr–Sommerfeld_model

  • Aissa Wade
  • Senegalese mathematician

    International Centre for Theoretical Physics, where she worked on conformal Dirac structures. She held visiting faculty positions at University of North Carolina

    Aissa Wade

    Aissa_Wade

  • Standard Model
  • Theory of forces and subatomic particles

    existence of dark matter and neutrino oscillations. In 1928, Paul Dirac introduced the Dirac equation, which implied the existence of antimatter. In 1954,

    Standard Model

    Standard Model

    Standard_Model

  • Weyl semimetal
  • Concept in quantum physics

    are a solution to the Dirac equation derived by Hermann Weyl, called the Weyl equation. For example, one-half of a charged Dirac fermion of a definite

    Weyl semimetal

    Weyl_semimetal

  • Fourier transform
  • Mathematical transform that expresses a function of time as a function of frequency

    integration theory. For example, many relatively simple applications use the Dirac delta function, which can be treated formally as if it were a function,

    Fourier transform

    Fourier transform

    Fourier_transform

  • Hamiltonian path
  • Path in a graph that visits each vertex exactly once

    Bondy–Chvátal theorem, which generalizes earlier results by G. A. Dirac (1952) and Øystein Ore. Both Dirac's and Ore's theorems can also be derived from Pósa's theorem

    Hamiltonian path

    Hamiltonian path

    Hamiltonian_path

  • Triiron ditin intermetallic
  • Chemical compound

    disrupting the atomic structure. The compound's band structure exhibits a double Dirac cone, enabling Dirac fermions. A 30 meV gap separates the cones, which

    Triiron ditin intermetallic

    Triiron_ditin_intermetallic

  • Chris Hull
  • British professor of theoretical physics (born 1957)

    geometries and holographic structures. Hull was awarded a Royal Society Wolfson Research Merit Award in 2002 and the Paul Dirac Medal and Prize by the Institute

    Chris Hull

    Chris_Hull

  • History of atomic theory
  • numbers. Then physicists discovered that these atoms had an internal structure of their own and therefore could be divided after all. Atomic theory is

    History of atomic theory

    History of atomic theory

    History_of_atomic_theory

  • Hydrogen-like atom
  • Atoms with a single valence electron, so they behave like hydrogen

    hydrogen-like ions. The non-relativistic Schrödinger equation and relativistic Dirac equation for the hydrogen atom and hydrogen-like atoms can be solved analytically

    Hydrogen-like atom

    Hydrogen-like_atom

  • Quantum electrodynamics
  • Quantum field theory of electromagnetism

    theory describing radiation and matter interaction is attributed to Paul Dirac, who during the 1920s computed the coefficient of spontaneous emission of

    Quantum electrodynamics

    Quantum electrodynamics

    Quantum_electrodynamics

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Online names & meanings

  • Sulya
  • Boy/Male

    Hindu, Indian

    Sulya

    Thy Breath

  • Jotish
  • Boy/Male

    Bengali, Hindu, Indian, Tamil

    Jotish

    Astrologist

  • Muntahi
  • Girl/Female

    Arabic, Muslim

    Muntahi

    Last Limit of Height

  • Lombard
  • Boy/Male

    Christian & English(British/American/Australian)

    Lombard

    Long-Beard

  • Ekvira
  • Girl/Female

    Gujarati, Hindu, Indian, Kannada

    Ekvira

    Queen Fish

  • Shaakha | ஸகா
  • Girl/Female

    Tamil

    Shaakha | ஸகா

    Branch

  • Sherbourn
  • Boy/Male

    British, English

    Sherbourn

    From the Clear Brook; From the Bright Stream

  • Dikshith
  • Boy/Male

    Hindu

    Dikshith

    Prepared, Initiated

  • CHLOÄ’
  • Female

    Greek

    CHLOÄ’

    (Χλόη) Greek name CHLOĒ means "green shoot." In mythology, this is a surname of the goddess Demeter. In the New Testament bible, this name is mentioned by Paul in 1 Corinthians 1:11. Also spelled Khloe.

  • Sanghamitra
  • Girl/Female

    Bengali, Hindu, Indian

    Sanghamitra

    Devotee of Lord Buddha; One who Maintains Friendship Between Different Groups

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Other words and meanings similar to

DIRAC STRUCTURE

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  • Vascular
  • a.

    Consisting of, or containing, vessels as an essential part of a structure; full of vessels; specifically (Bot.), pertaining to, or containing, special ducts, or tubes, for the circulation of sap.

  • Vault
  • n.

    An arched structure of masonry, forming a ceiling or canopy.

  • Vermiculite
  • n.

    A group of minerals having, a micaceous structure. They are hydrous silicates, derived generally from the alteration of some kind of mica. So called because the scales, when heated, open out into wormlike forms.

  • Variability
  • n.

    The power possessed by living organisms, both animal and vegetable, of adapting themselves to modifications or changes in their environment, thus possibly giving rise to ultimate variation of structure or function.

  • Variety
  • n.

    In inorganic nature, one of those forms in which a species may occur, which differ in minor characteristics of structure, color, purity of composition, etc.

  • Vesicular
  • a.

    Having the form or structure of a vesicle; as, a vesicular body.

  • Utricle
  • n.

    A microscopic cell in the structure of an egg, animal, or plant.

  • Vessel
  • n.

    A general name for any hollow structure made to float upon the water for purposes of navigation; especially, one that is larger than a common rowboat; as, a war vessel; a passenger vessel.

  • Structureless
  • a.

    Without a definite structure, or arrangement of parts; without organization; devoid of cells; homogeneous; as, a structureless membrane.

  • Uropod
  • n.

    Any one of the abdominal appendages of a crustacean, especially one of the posterior ones, which are often larger than the rest, and different in structure, and are used chiefly in locomotion. See Illust. of Crustacea, and Stomapoda.

  • Structure
  • n.

    Arrangement of parts, of organs, or of constituent particles, in a substance or body; as, the structure of a rock or a mineral; the structure of a sentence.

  • Wall
  • n.

    A work or structure of stone, brick, or other materials, raised to some height, and intended for defense or security, solid and permanent inclosing fence, as around a field, a park, a town, etc., also, one of the upright inclosing parts of a building or a room.

  • Structured
  • a.

    Having a definite organic structure; showing differentiation of parts.

  • Structure
  • n.

    Manner of organization; the arrangement of the different tissues or parts of animal and vegetable organisms; as, organic structure, or the structure of animals and plants; cellular structure.

  • Unsymmetrical
  • a.

    Being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom.

  • Unossified
  • a.

    Destitute of a bony structure.

  • Viaduct
  • n.

    A structure of considerable magnitude, usually with arches or supported on trestles, for carrying a road, as a railroad, high above the ground or water; a bridge; especially, one for crossing a valley or a gorge. Cf. Trestlework.

  • Leatherwood
  • n.

    A small branching shrub (Dirca palustris), with a white, soft wood, and a tough, leathery bark, common in damp woods in the Northern United States; -- called also moosewood, and wicopy.

  • Vesicular
  • a.

    Containing, or composed of, vesicles or vesiclelike structures; covered with vesicles or bladders; vesiculate; as, vesicular coral; vesicular lava; a vesicular leaf.

  • Vinery
  • n.

    A structure, usually inclosed with glass, for rearing and protecting vines; a grapery.