Approximation of semiclassical expectation values by symplectic Gaussian wave packet dynamics
Sign Up to like & getrecommendations! Published in 2021 at "Letters in Mathematical Physics"
DOI: 10.1007/s11005-021-01462-6
Abstract: This paper concerns an approximation of the expectation values of the position and momentum of the solution to the semiclassical Schr\"odinger equation with a Gaussian as the initial condition. Of particular interest is the approximation… read more here.
Keywords: wave packet; approximation; expectation values; expectation ... See more keywords
On the finite volume expectation values of local operators in the sine-Gordon model
Sign Up to like & getrecommendations! Published in 2019 at "Nuclear Physics B"
DOI: 10.1016/j.nuclphysb.2019.114749
Abstract: Abstract In this paper we present sets of linear integral equations which make possible to compute the finite volume expectation values of the trace of the stress energy tensor (Θ) and the U ( 1… read more here.
Keywords: sine gordon; expectation values; finite volume; expectation ... See more keywords
Importance of Orbital Invariance in Quantifying Electron-Hole Separation and Exciton Size.
Sign Up to like & getrecommendations! Published in 2024 at "Journal of chemical theory and computation"
DOI: 10.1021/acs.jctc.4c01085
Abstract: A fundamental tenet of quantum mechanics is that properties should be independent of representation. In self-consistent field methods such as density functional theory, this manifests as a requirement that properties be invariant with respect to… read more here.
Keywords: expectation values; importance orbital; separation; molecular orbitals ... See more keywords
Variational quantum generative modeling by sampling expectation values of tunable observables
Sign Up to like & getrecommendations! Published in 2025 at "Npj Quantum Information"
DOI: 10.1038/s41534-025-01121-x
Abstract: Expectation Value Samplers (EVSs) are quantum generative models that can learn high-dimensional continuous distributions by measuring the expectation values of parameterized quantum circuits. However, these models can demand impractical quantum resources for good performance. We… read more here.
Keywords: expectation values; variational quantum; quantum generative; generative modeling ... See more keywords
Cosmological coherent state expectation values in loop quantum gravity I. Isotropic kinematics
Sign Up to like & getrecommendations! Published in 2018 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aac4ba
Abstract: This is the first paper of a series dedicated to LQG coherent states and cosmology. The concept is based on the effective dynamics program of Loop Quantum Cosmology, where the classical dynamics generated by the… read more here.
Keywords: expectation values; cosmology; coherent; expectation ... See more keywords
Some ground-state expectation values for the free parafermion Z(N) spin chain
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Statistical Mechanics: Theory and Experiment"
DOI: 10.1088/1742-5468/ab4fe1
Abstract: We consider the calculation of ground-state expectation values for the non-Hermitian Z(N) spin chain described by free parafermions. For N=2 the model reduces to the quantum Ising chain in a transverse field with open boundary… read more here.
Keywords: ground state; expectation values; chain; state expectation ... See more keywords
Semiclassical evaluation of expectation values.
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review E"
DOI: 10.1103/physreve.102.042211
Abstract: Semiclassical mechanics allows for a description of quantum systems which preserves their phase information, and thus interference effects, while using only the system's classical dynamics as an input. In particular one of the strengths of… read more here.
Keywords: phase approximation; expectation values; stationary phase; expectation ... See more keywords