• In quantum mechanics, a Fock state or number state is a quantum state that is an element of a Fock space with a well-defined number of particles (or quanta)...
    30 KB (5,633 words) - 14:50, 24 May 2024
  • Klein–Gordon equation. He gave his name to Fock space, the Fock representation and Fock state, and developed the Hartree–Fock method in 1930. He made many subsequent...
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  • respectively). A general state in Fock space is a linear combination of n-particle states, one for each n. Technically, the Fock space is (the Hilbert space...
    16 KB (2,903 words) - 01:56, 31 December 2023
  • however, the quantum system has no classical analog, e.g. an incoherent Fock state or entangled system, then P is negative somewhere or more singular than...
    21 KB (3,333 words) - 04:20, 25 October 2024
  • Thumbnail for Second quantization
    by Pascual Jordan and Vladimir Fock. In this approach, the quantum many-body states are represented in the Fock state basis, which are constructed by...
    34 KB (6,449 words) - 04:20, 22 August 2024
  • function and the energy of a quantum many-body system in a stationary state. The Hartree–Fock method often assumes that the exact N-body wave function of the...
    31 KB (4,730 words) - 17:08, 7 October 2024
  • Fock state (e.g. a single photon) is the most particle-like state; it has a fixed number of particles, and phase is indeterminate. A coherent state distributes...
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  • Thumbnail for Causal fermion systems
    Moreover, it comprises quantum objects like wave functions and a fermionic Fock state. Inspired by the Langrangian formulation of classical field theory, the...
    32 KB (5,050 words) - 18:33, 13 September 2024
  • Vladimir Fock: Fock matrix Fock operator Fock model Fock representation Fock space Bargmann–Fock space Fock state Fock symmetry Fock–Lorentz symmetry Fock–Schwinger...
    953 bytes (71 words) - 15:39, 31 August 2023
  • Thumbnail for German training ship Gorch Fock (1958)
    The Gorch Fock is a tall ship of the German Navy (Deutsche Marine), built in 1958 as a replacement for the original Gorch Fock built in 1933 which was...
    15 KB (1,549 words) - 01:35, 8 October 2024
  • however, the quantum system has no classical analog, e.g. an incoherent Fock state or entangled system, then P is negative somewhere or more singular than...
    14 KB (2,600 words) - 09:52, 16 September 2024
  • \rangle _{\nu }=|\phi _{1},\phi _{2},\cdots ,\phi _{n}\rangle _{\nu }} be a Fock state, composed of single-particle states | ϕ i ⟩ {\displaystyle |\phi _{i}\rangle...
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  • Thumbnail for Qubit
    Qubit (redirect from Pure qubit state)
    of the classic binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical system, and is one of the...
    42 KB (4,895 words) - 14:45, 25 October 2024
  • Collider. In modern physics notation, the quantum state of the electromagnetic field is written as a Fock state, a tensor product of the states for each electromagnetic...
    107 KB (11,684 words) - 00:55, 27 October 2024
  • Thumbnail for Quantum entanglement
    mode". Finally, there also exist twin Fock states for bosonic modes, which can be created by feeding a Fock state into two arms leading to a beam splitter...
    108 KB (13,191 words) - 22:21, 30 October 2024
  • Thumbnail for Spontaneous parametric down-conversion
    Bellini, Marco (2004). "Tomographic reconstruction of the single-photon Fock state by high-frequency homodyne detection". Physical Review A. 70 (5): 053821...
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  • In the Hartree–Fock method of quantum mechanics, the Fock matrix is a matrix approximating the single-electron energy operator of a given quantum system...
    3 KB (463 words) - 18:45, 12 August 2023
  • Particle number (category State functions)
    the particle number operator (see Fock state) is conjugate to the phase of the classical wave (see coherent state). One measure of air pollution used...
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  • Thumbnail for Gorch Fock (1933)
    Gorch Fock I (ex Tovarishch, ex Gorch Fock) is a German three-mast barque, the first of a series built as school ships for the German Reichsmarine in 1933...
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  • into one object (a Fock state), and then describe the "evolution" of this state over time using the interaction picture. The Fock space is spanned by...
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  • The Klein–Gordon equation (Klein–Fock–Gordon equation or sometimes Klein–Gordon–Fock equation) is a relativistic wave equation, related to the Schrödinger...
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  • collapse zero-point energy bound state coherent state squeezed coherent state density state Fock state, Fock space vacuum state quasinormal mode no-cloning...
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  • mechanics Observable Operator (physics) Quantum state Pure state Fock state, Fock space Density state Coherent state Heisenberg picture Density matrix Quantum...
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  • Thumbnail for Squeezed coherent state
    explicitly shows that the pure SMSV consists entirely of even-photon Fock state superpositions. Single mode squeezed states are typically generated by...
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  • Thumbnail for Computational chemistry
    single Fock state that minimizes the energy. NP-hard or NP-complete as demonstrated by embedding instances of the Ising model into Hartree-Fock calculations...
    77 KB (8,357 words) - 01:20, 24 October 2024
  • defined in the number (Fock) basis. Notice that if we add the two states together, the resulting cat state only contains even Fock state terms: | c a t e ⟩...
    38 KB (4,629 words) - 00:49, 31 August 2024
  • computational chemistry, post–Hartree–Fock (post-HF) methods are the set of methods developed to improve on the Hartree–Fock (HF), or self-consistent field (SCF)...
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  • Unrestricted Hartree–Fock (UHF) theory is the most common molecular orbital method for open shell molecules where the number of electrons of each spin...
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  • })^{n}|0\rangle =n(a^{\dagger })^{n}|0\rangle .} A photon number state (or a Fock state) is an eigenstate of the number operator. This is why the formalism...
    25 KB (5,083 words) - 09:02, 25 October 2024
  • described by the Fock states, so, for example | 0 ⟩ a {\displaystyle |0\rangle _{a}} corresponds to mode a empty (the vacuum state), and inserting one...
    20 KB (2,724 words) - 18:36, 27 October 2024