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...ators]] corresponding to the classical [[Stokes parameters]]. These matrix operators are identical to the [[Pauli matrices]] . ...dfonline.com/doi/abs/10.1080/09500349808231919?journalCode=tmop20 Stokes operators, angular momentum and radiation phase.] ...

In mathematics '''Euler operators''' may refer to: * Euler–Lagrange differential operators ''d''/''dx'': see [[Lagrangian system]] ...

...[[Hamiltonian (quantum mechanics)|Hamiltonian]] into account. The Møller operators are [[isometry|isometric]]. {{quantum-stub}} ...

...ntum chemistry]], the '''Dyall Hamiltonian''' is a modified [[Hamiltonian (quantum mechanics)|Hamiltonian]] with two-electron nature. It can be written as fol ...<math>S^2</math> and <math>S_z</math>, therefore the application of these operators on a spin-pure function produces again a spin-pure function. ...

...muting Operators and General Phase-Space Methods in Quantum Mechanics. II. Quantum Mechanics in Phase Space", ''Phys. Rev. D'','''2''' (1970) pp. 2187–2205. { ...tor that is expressible as a power series in the creation and annihilation operators that satisfies the ordering Ω. Then the optical equivalence theorem is suc ...

{{Short description|Quantum number related to rotational symmetry}} {{further|Azimuthal quantum number#Addition of quantized angular momenta}} ...

{{Short description|Theorem on boundedness of symmetric operators}} ...''y'' in the domain of ''A''. Note that symmetric ''everywhere-defined'' operators are necessarily [[self-adjoint operator|self-adjoint]], so this theorem can ...

...scription|In physics, a linear operator acting on a vector space of linear operators}} ...[[Linear map|linear operators]].<ref>[[John Preskill]], Lecture notes for Quantum Computation course at [[Caltech]], [https://www.theory.caltech.edu/~preskil ...

{{Short description|Operator in quantum mechanics}} In [[quantum mechanics]], for systems where the total [[Particle number|number of partic ...

{{Short description|Term in quantum field theory}} {{Quantum mechanics}} ...

{{Quantum mechanics}} ...le to the [[Planck length]]. Each theory of quantum gravity uses the term "quantum geometry" in a slightly different fashion. ...

{{Short description|Mathematical operator in quantum optics}} ...e '''displacement operator''' for one mode is the [[shift operator]] in [[quantum optics]], ...

...ngular momentum operator#Orbital angular momentum|quantum angular momentum operators]] ...

{{Short description|Theorem in axiomatic quantum field theory}} The '''Reeh–Schlieder theorem''' is a result in relativistic [[local quantum field theory]] published by [[Helmut Reeh]] and [[Siegfried Schlieder]] in ...

...metry]], [[quantum statistical mechanics]], [[quantum information]], and [[quantum field theory]]. Operator algebras can be used to study arbitrary sets of operators with little algebraic relation ''simultaneously''. From this point of view, ...

{{Short description|Measure of information in quantum information theory}} ...ing used for the [[von Neumann entropy]]. Like other entropies, the joint quantum entropy is measured in [[bit]]s, i.e. the logarithm is taken in base 2. ...

...tum field theory]], an '''order operator''' or an '''order field''' is a [[quantum field]] version of Landau's [[order parameter]] whose expectation value cha ...ates a [[Discontinuity (mathematics)|discontinuity]] of the ordinary order operators or a [[monodromy]] for their values. For example, a [['t Hooft loop|'t Hoof ...

...p-th/9211100 | last1=Gepner | first1=Doron | title=Foundations of Rational Quantum Field Theory, I | date=1992 }}</ref> is a special type of [[two-dimensional ...formal field theory'' can refer to any CFT with a finite number of primary operators with respect to the action of its chiral algebra. Chiral algebras can be mu ...

In [[quantum physics]], the '''squeeze operator''' for a single mode of the electromagne |title=Introductory quantum optics ...

...e [[Domain of a function|domain]] of <math>A</math>. Positive-semidefinite operators are denoted as <math>A\ge 0</math>. The operator is said to be '''positive In physics (specifically [[quantum mechanics]]), such operators represent [[quantum state]]s, via the [[density matrix]] formalism. ...