Results 21 to 30 of about 1,720 (88)

Comment on "Feynman Effective Classical Potential in the Schrodinger Formulation"

open access: yes, 2002
We comment on the paper "Feynman Effective Classical Potential in the Schrodinger Formulation"[Phys. Rev. Lett. 81, 3303 (1998)]. We show that the results in this paper about the time evolution of a wave packet in a double well potential can be properly ...
A. Bonanno   +9 more
core   +1 more source

Algebraic structure of the Feynman propagator and a new correspondence for canonical transformations

open access: yes, 2007
We investigate the algebraic structure of the Feynman propagator with a general time-dependent quadratic Hamiltonian system. Using the Lie-algebraic technique we obtain a normal-ordered form of the time-evolution operator, and then the propagator is ...
Akihiro Ogura   +3 more
core   +1 more source

Finite Projective Spaces, Geometric Spreads of Lines and Multi-Qubits

open access: yes, 2012
Given a (2N - 1)-dimensional projective space over GF(2), PG(2N - 1, 2), and its geometric spread of lines, there exists a remarkable mapping of this space onto PG(N - 1, 4) where the lines of the spread correspond to the points and subspaces spanned by ...
Dye R. H.   +7 more
core   +1 more source

Wick ordering for coherent state quantization in 1+1 de Sitter space

open access: yes, 2007
We show that the coherent state quantization of massive particles in 1+1 de Sitter space exhibits an ordering property: There exist some classical observables $A$ and $A^*$ such that $O_{A^{*p}}O_{A^q}=O_{A^{*p} A^q}$ $p, q \in \Z$, where $O_A$ is the ...
A. Rabeie   +12 more
core   +3 more sources

A singular position-dependent mass particle in an infinite potential well

open access: yes, 2008
We consider an unusual singular position=dependent-mass particle in an infinite potential well. The corresponding Hamiltonian is mapped through a point-canonical-transformation and an explicit correspondence between the target Hamiltonian and a Poschl ...
Alhaidari   +38 more
core   +1 more source

Functions of linear operators: Parameter differentiation

open access: yes, 1999
We derive a useful expression for the matrix elements $[\frac{\partial f[A(t)]}{\partial t}]_{i j}$ of the derivative of a function $f[A(t)]$ of a diagonalizable linear operator $A(t)$ with respect to the parameter $t$. The function $f[A(t)]$ is supposed
Constantino Tsallis   +2 more
core   +2 more sources

Quantum Information Entropies on Hyperbolic Single Potential Wells. [PDF]

open access: yesEntropy (Basel), 2022
Gil-Barrera CA   +3 more
europepmc   +1 more source

Quantum-Classical Hybrid Systems and Ehrenfest's Theorem. [PDF]

open access: yesEntropy (Basel), 2023
Sergi A   +3 more
europepmc   +1 more source

Common Coherence Witnesses and Common Coherent States. [PDF]

open access: yesEntropy (Basel), 2021
Wang BH, Ding ZH, Ma Z, Fei SM.
europepmc   +1 more source

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