Cluster mean-field study of spinor Bose-Hubbard ladder:Ground-state phase diagram and many-body population dynamics

2020 ◽  
Author(s):  
Li Zhang ◽  
Wenjie Liu ◽  
Jiahao Huang ◽  
Chaohong Lee
Keyword(s):  
Phase Diagram ◽  
Population Dynamics ◽  
Field Study ◽  
Mean Field ◽  
Many Body

scholarly journals Phase Diagram of Coupled Glassy Systems: A Mean-Field Study

1997 ◽  
Vol 79 (13) ◽  
pp. 2486-2489 ◽  
Author(s):  
Silvio Franz ◽  
Giorgio Parisi
Keyword(s):  
Phase Diagram ◽  
Field Study ◽  
Mean Field ◽  
Glassy Systems

scholarly journals Mean-field phase diagram of the extended Bose-Hubbard model of many-body cavity quantum electrodynamics

2019 ◽  
Vol 99 (4) ◽  
Author(s):  
Lukas Himbert ◽  
Cecilia Cormick ◽  
Rebecca Kraus ◽  
Shraddha Sharma ◽  
Giovanna Morigi
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Quantum Electrodynamics ◽  
Mean Field ◽  
Body Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Many Body ◽  
Field Phase

Superconducting phase diagram of a narrow-band system atT=0: A mean-field study

1993 ◽  
Vol 48 (22) ◽  
pp. 16673-16679 ◽  
Author(s):  
A. N. Das ◽  
Sujit Sarkar ◽  
P. Choudhury
Keyword(s):  
Phase Diagram ◽  
Field Study ◽  
Narrow Band ◽  
Band System ◽  
Mean Field ◽  
Superconducting Phase

scholarly journals Tuning the quantumness of simple Bose systems: A universal phase diagram

2020 ◽  
Vol 117 (44) ◽  
pp. 27231-27237 ◽  
Author(s):  
Youssef Kora ◽  
Massimo Boninsegni ◽  
Dam Thanh Son ◽  
Shiwei Zhang
Keyword(s):  
Phase Diagram ◽  
Mean Field Theory ◽  
Mean Field ◽  
Particle Interactions ◽  
Many Body ◽  
Lennard Jones ◽  
Experimental Systems ◽  
Quantum Indistinguishability ◽  
The Many ◽  
The One

We present a comprehensive theoretical study of the phase diagram of a system of many Bose particles interacting with a two-body central potential of the so-called Lennard-Jones form. First-principles path-integral computations are carried out, providing essentially exact numerical results on the thermodynamic properties. The theoretical model used here provides a realistic and remarkably general framework for describing simple Bose systems ranging from crystals to normal fluids to superfluids and gases. The interplay between particle interactions on the one hand and quantum indistinguishability and delocalization on the other hand is characterized by a single quantumness parameter, which can be tuned to engineer and explore different regimes. Taking advantage of the rare combination of the versatility of the many-body Hamiltonian and the possibility for exact computations, we systematically investigate the phases of the systems as a function of pressure (P) and temperature (T), as well as the quantumness parameter. We show how the topology of the phase diagram evolves from the known case of4He, as the system is made more (and less) quantum, and compare our predictions with available results from mean-field theory. Possible realization and observation of the phases and physical regimes predicted here are discussed in various experimental systems, including hypothetical muonic matter.

scholarly journals A beyond mean-field study of the Tavis-Cummings model

2019 ◽  
Author(s):  
C. Tejera-Centeno ◽  
P. Pérez-Fernández ◽  
J. M. Arias
Keyword(s):  
Field Study ◽  
Mean Field

scholarly journals The phase diagram of carbon dioxide from correlation functions and a many-body potential

2021 ◽  
Vol 155 (2) ◽  
pp. 024503
Author(s):  
Amanda A. Chen ◽  
Alexandria Do ◽  
Tod A. Pascal
Keyword(s):  
Carbon Dioxide ◽  
Phase Diagram ◽  
Correlation Functions ◽  
Many Body ◽  
Body Potential

scholarly journals Derivation of the Landau–Pekar Equations in a Many-Body Mean-Field Limit

2021 ◽  
Vol 240 (1) ◽  
pp. 383-417
Author(s):  
Nikolai Leopold ◽  
David Mitrouskas ◽  
Robert Seiringer
Keyword(s):  
Mean Field ◽  
Einstein Condensate ◽  
Back Reaction ◽  
Many Body ◽  
Field Limit ◽  
Mean Field Limit ◽  
Phonon Field ◽  
Bose Einstein Condensate ◽  
Weakly Couple ◽  
Bose Einstein

AbstractWe consider the Fröhlich Hamiltonian in a mean-field limit where many bosonic particles weakly couple to the quantized phonon field. For large particle numbers and a suitably small coupling, we show that the dynamics of the system is approximately described by the Landau–Pekar equations. These describe a Bose–Einstein condensate interacting with a classical polarization field, whose dynamics is effected by the condensate, i.e., the back-reaction of the phonons that are created by the particles during the time evolution is of leading order.

scholarly journals Entanglement and Disordered-Enhanced Topological Phase in the Kitaev Chain

Universe ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 33 ◽  
Author(s):  
Liron Levy ◽  
Moshe Goldstein
Keyword(s):  
Phase Diagram ◽  
Information Theory ◽  
Quantum Information ◽  
Critical Point ◽  
Entanglement Entropy ◽  
Quantum Information Theory ◽  
Topological Phase ◽  
Many Body ◽  
Zero Modes ◽  
Many Body Systems

In recent years, tools from quantum information theory have become indispensable in characterizing many-body systems. In this work, we employ measures of entanglement to study the interplay between disorder and the topological phase in 1D systems of the Kitaev type, which can host Majorana end modes at their edges. We find that the entanglement entropy may actually increase as a result of disorder, and identify the origin of this behavior in the appearance of an infinite-disorder critical point. We also employ the entanglement spectrum to accurately determine the phase diagram of the system, and find that disorder may enhance the topological phase, and lead to the appearance of Majorana zero modes in systems whose clean version is trivial.

scholarly journals Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study

2019 ◽  
Vol 122 (12) ◽  
Author(s):  
D. Geffroy ◽  
J. Kaufmann ◽  
A. Hariki ◽  
P. Gunacker ◽  
A. Hausoel ◽  
...  
Keyword(s):  
Field Study ◽  
Mean Field ◽  
Collective Modes
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