Results 51 to 60 of about 72,880 (178)

Non-compact Quantum Spin Chains as Integrable Stochastic Particle Processes [PDF]

Journal of Statistical Physics, 2019
In this paper we discuss a family of models of particle and energy diffusion on a one-dimensional lattice, related to those studied previously in [Sasamoto-Wadati], [Barraquand-Corwin] and [Povolotsky] in the context of KPZ universality class. We show that they may be mapped onto an integrable $\mathfrak{sl}(2)$ Heisenberg spin chain whose Hamiltonian ...
Frassek, R., Giardinà, C, Kurchan, J
openaire   +3 more sources

A Monte-Carlo Approach to Zero Energy Quantum Scattering [PDF]

, 1995
Monte-Carlo methods for zero energy quantum scattering are developed. Starting from path integral representations for scattering observables, we present results of numerical calculations for potential scattering and scattering off a schematic $^4 \rm He $
Batty, Bender, Carlson, Creutz, Dashen, Dover, Duane, Eisenberg, Feynman, Foldy, Friedman, Gelman, Goldberger, Graham, Greiner, Helmbercht, Hubertus Mall, Hüfner, Kalos, Kalos, Kalos, Kerman, Kloeden, Kohno, Kronfeld, Lang, Lenz, Lenz, Lenz, Lenz, Loh, Mackenzie, Makri, Namiki, Negele, Newton, Parisi, Rodberg, Stefan Lenz, von der Linden, Whitlock   +40 more
core   +2 more sources

Higher-order spin noise statistics

New Journal of Physics, 2013
The optical spin noise spectroscopy (SNS) is a minimally invasive route toward obtaining dynamical information about electrons and atomic gases by measuring mesoscopic time-dependent spin fluctuations. Recent improvements of the sensitivity of SNS should
Fuxiang Li, Avadh Saxena, Darryl Smith, Nikolai A Sinitsyn   +3 more
doaj   +1 more source

Accurate exchange-correlation energies for the warm dense electron gas [PDF]

, 2016
Density matrix quantum Monte Carlo (DMQMC) is used to sample exact-on-average $N$-body density matrices for uniform electron gas systems of up to 10$^{124}$ matrix elements via a stochastic solution of the Bloch equation.
Blunt, N. S., Brown, Ethan W., Foulkes, W. M. C., Lee, D. K. K., Malone, Fionn D., Shepherd, James J., Spencer, J. S.   +6 more
core   +3 more sources

A "problem of time" in the multiplicative scheme for the $n$-site hopper

, 2017
Quantum Measure Theory (QMT) is an approach to quantum mechanics, based on the path integral, in which quantum theory is conceived of as a generalised stochastic process. One of the postulates of QMT is that events with zero quantum measure do not occur,
Dowker, Fay, Havlíček, Vojtěch, Lewandowski, Cyprian, Wilkes, Henry   +3 more
core   +1 more source

Robust Stability of Quantum Systems with Nonlinear Dynamic Uncertainties

, 2013
This paper considers the problem of robust stability for a class of uncertain nonlinear quantum systems subject to unknown perturbations in the system Hamiltonian.
Petersen, Ian R.
core   +1 more source

Analytical phase boundary of a quantum driven-dissipative Kerr oscillator from classical stochastic instantons

Physical Review Research
The framework of Keldysh path integral concisely describes quantum systems driven away from thermal equilibrium, such as the two-photon driven Kerr oscillator.
Théo Sépulcre
doaj   +1 more source

Quantum Monte Carlo calculation of entanglement Renyi entropies for generic quantum systems

, 2012
We present a general scheme for the calculation of the Renyi entropy of a subsystem in quantum many-body models that can be efficiently simulated via quantum Monte Carlo.
A. Rényi, P. W. Anderson, Stephan Humeniuk, Tommaso Roscilde   +3 more
core   +1 more source

Fully consistent density functional theory determination of the insulator-metal transition boundary in warm dense hydrogen

Physical Review Research, 2020
Using conceptually and procedurally consistent density functional theory (DFT) calculations with an advanced meta-generalized gradient approximation (GGA) exchange-correlation functional in ab initio Born-Oppenheimer molecular dynamics (BOMD) simulations,
Joshua Hinz, Valentin V. Karasiev, S. X. Hu, Mohamed Zaghoo, Daniel Mejía-Rodríguez, S. B. Trickey, L. Calderín   +6 more
doaj   +1 more source

All about the neutron from lattice QCD

SciPost Physics Proceedings
I describe how simulations of lattice QCD using the path integral formulation provide the two basic quantum mechanical properties of QCD, its ground state in which correlation functions are calculated, and Fock state wavefunctions between which matrix ...
Rajan Gupta
doaj   +1 more source