Path integral Brownian chain molecular dynamics: A simple approximation of quantum vibrational dynamics
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Computational Chemistry"
DOI: 10.1002/jcc.26989
Abstract: An approximate approach to quantum vibrational dynamics, “Brownian chain molecular dynamics (BCMD),” is proposed to alleviate the chain resonance and curvature problems in the imaginary time‐based path integral (PI) simulation. Here the non‐centroid velocity is… read more here.
Keywords: path integral; molecular dynamics; quantum vibrational; vibrational dynamics ... See more keywords
Path Integral Molecular Dynamics of Liquid Water in a Mean-Field Particle Reservoir.
Sign Up to like & getrecommendations! Published in 2022 at "ChemistryOpen"
DOI: 10.1002/open.202100286
Abstract: We present a simulation scheme for path integral simulation of molecular liquids where a small open region is embedded in a large reservoir of non interacting point-particles. The scheme is based on the latest development… read more here.
Keywords: liquid water; integral molecular; path; path integral ... See more keywords
Path integral complexity and Kasner singularities
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2022)150
Abstract: Abstract We explore properties of path integral complexity in field theories on time dependent backgrounds using its dual description in terms of Hartle-Hawking wavefunctions. In particular, we consider boundary theories with time dependent couplings which… read more here.
Keywords: path integral; complexity kasner; integral complexity; complexity ... See more keywords
Jackiw-Teitelboim gravity in the second order formalism
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2021)204
Abstract: Abstract We formulate the path integral for Jackiw-Teitelboim gravity in the second order formalism working directly with the metric and the dilaton. We consider the theory both in Anti-de Sitter(AdS) and de Sitter space(dS) and… read more here.
Keywords: topology; order formalism; path integral; jackiw teitelboim ... See more keywords
Functional methods for false-vacuum decay in real time
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2019)095
Abstract: Abstract We present the calculation of the Feynman path integral in real time for tunneling in quantum mechanics and field theory, including the first quantum corrections. For this purpose, we use the well-known fact that… read more here.
Keywords: time; path integral; real time; functional methods ... See more keywords
A Rigorous Construction of the Supersymmetric Path Integral Associated to a Compact Spin Manifold
Sign Up to like & getrecommendations! Published in 2022 at "Communications in Mathematical Physics"
DOI: 10.1007/s00220-022-04336-7
Abstract: We give a rigorous construction of the path integral in $${\mathcal {N}}=1/2$$ N = 1 / 2 supersymmetry as an integral map for differential forms on the loop space of a compact spin manifold. It… read more here.
Keywords: rigorous construction; compact spin; supersymmetric path; spin manifold ... See more keywords
Derivation of the Keldysh Path Integral from the Master Equation of a Harmonic Oscillator in a Thermal Bath Via Supercoherent States
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Russian Laser Research"
DOI: 10.1007/s10946-018-9742-0
Abstract: We consider a harmonic oscillator coupled to a Markovian environment, i.e. a thermal reservoir. We derive the Keldysh path integral and the corresponding lesser, greater, time-ordered, antitime-ordered, retarded, advanced, and Keldysh Green’s functions for this… read more here.
Keywords: harmonic oscillator; path integral; supercoherent states; keldysh path ... See more keywords
A Path-Integral Analysis of Interacting Bose Gases and Loop Gases
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Statistical Physics"
DOI: 10.1007/s10955-020-02543-x
Abstract: We review some recent results on interacting Bose gases in thermal equilibrium. In particular, we study the convergence of the grand-canonical equilibrium states of such gases to their mean-field limits, which are given by the… read more here.
Keywords: path integral; analysis interacting; gases loop; interacting bose ... See more keywords
Quantum effects on elastic constants of diamond by path-integral Monte Carlo simulations
Sign Up to like & getrecommendations! Published in 2020 at "Computational Materials Science"
DOI: 10.1016/j.commatsci.2019.109387
Abstract: Abstract Using the path-integral Monte Carlo method, we investigate the quantum effects on the elastic constants C 11 , C 12 , and C 44 of the diamond crystal in a wide temperature range at… read more here.
Keywords: elastic constants; integral monte; monte carlo; effects elastic ... See more keywords
Transport coefficients of normal liquid helium-4 calculated by path integral centroid molecular dynamics simulation
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Physics Letters"
DOI: 10.1016/j.cplett.2017.01.034
Abstract: Abstract Thermal conductivity, shear viscosity, and bulk viscosity of normal liquid 4 He at 1.7–4.0 K are calculated using path integral centroid molecular dynamics (CMD) simulations. The calculated thermal conductivity and shear viscosity above lambda transition… read more here.
Keywords: viscosity; centroid molecular; shear viscosity; integral centroid ... See more keywords
Path integral molecular dynamics at zero thermal temperature
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Physics Letters"
DOI: 10.1016/j.cplett.2017.02.038
Abstract: Abstract Path integral molecular dynamics (PIMD) simulations at the zero thermal temperature still remain inconceivable. Herein, the quantum-mechanical partition function is revised in conjunction with the time-independent Schrodinger equation. The imaginary temperature for the quantum–mechanical… read more here.
Keywords: zero thermal; temperature; thermal temperature; molecular dynamics ... See more keywords