Study of Kosterlitz--Thouless Transition of Bose Systems Governed by a Random Potential Using Quantum Monte Carlo Simulations
スポンサーリンク
概要
- 論文の詳細を見る
We perform quantum Monte Carlo simulations to study the 2D hard-core Bose--Hubbard model in a random potential. Our motivation is to investigate the effects of randomness on the Kosterlitz--Thouless (KT) transition and its quantum critical phenomenon. The chemical potential is assumed to be random, by site, with a Gaussian distribution. The KT transition is confirmed by a finite-size analysis of the superfluid density and the power-law decay of the correlation function. By changing the variance of the Gaussian distribution, we find that the transition temperature decreases as the variance increases. We obtain the phase diagram showing the superfluid and the disordered phases, and estimate the quantum critical point (QCP) and the critical exponent. Our results on the ground state show the existence of the Bose glass phase. Finally, we discuss what the variance of the QCP indicates from the viewpoint of quantum percolation.
- 2011-03-15
著者
-
Tsubota Makoto
Department Of Agricultural Engineering Kochi University
-
Kuroyanagi Hiroki
Department of Physics, Osaka City University, Osaka 558-8585, Japan
-
Tsukamoto Mitsuaki
Department of Physics, Osaka City University, Osaka 558-8585, Japan
関連論文
- -0905-THREE-DEMENSIONAL RECONSTRUCTION OF RESECTED SPECIMENS FROM PATIENTS TITH VENTRICULAR TACHYCARDIA : THE 54th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- -217-CLINICAL APPLICATION OF AMBULATORY HOLTER TAPE RECORDING OF ATRIAL ELECTROGRAM TO THE PATIENTS WITH WPW SYNDROME
- -0281-ELECTROPHYSIOLOGIC AND HEMODYNAMIC STUDY FOR ATRIAL FIBRILLATION IN WOLFF-PARKINSON-WHITE SYNDROME
- DIAGNOSIS AND TREATMENT OF LEFT VENTRICULAR FALSE ANEURYSM
- BASIC STUDY OF LASER IRRADIATION TREATMENT FOR VENTRICULAR ARRHYTHMIA : Arrhythmias : 53 Annual Scientific Meeting, Japanese Circulation Society
- LONG TERM FOLLOW UP STUDY ON ATRIAL FIBRILLATION AFTER ACCESSORY PATHWAY DIVISION IN THE WPW SYNDROME : Arrhythmias, Clinical : PROCEEDINGS OF THE 50th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- ELECTROPHYSIOLOGICAL CHARACTERISTICS OF WPW SYNDROME COMBINED WITH EBSTEIN'S ANOMALY : Arrhythmias (II) : FREE COMMUNICATIONS (III) : PROCEEDINGS OF THE 49th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- -55-CLINICAL AND PATHOLOGICAL STUDY OF NONISCHEMIC VENTRICULAR TACHYCARDIA ARISING FROM RIGHT VENTRICULAR OUTFLOW TRACT : Arrhythmias : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 53th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Study of Reconnection and Acoustic Emission of Quantized Vortices in Superfluid by the Numerical Analysis of the Gross-Pitaevskii Equation
- Josephson Current Flowing in Cyclically Coupled Bose-Einstein Condensates : Condensed Matter: Structure, etc.
- n Solitons of Superfluid ^3He-B in Slab Geometry : Condensed Matter and Statistical Physics
- Relaxation of Brinkman-Smith Mode in Superfluid ^3He-B between Parallel Plates : I. QUANTUM LIQUIDS AND SOLIDS : Superfluid ^3He
- Magnetic Domain Wall in uudd ^3He : Condensed Matter and Statistical Physics
- Low Frequency Spin Wave and Magnetic Soliton in uudd ^3He : Condensed Matter and Statistical Physics
- Two Cases of Off-pump Coronary Artery Bypass Grafting Combined with Abdominal Aortic Aneurysm Repair
- Quantum Turbulence(New Frontiers of Quantum Fluids and Solids)
- 18aXJ-11 Boson dynamics in disordered optical potentials
- Path Integral Approach to Vortex Filament in Superfluid ^4He
- Boojums in Rotating Two-Component Bose-Einstein Condensates(Condensed matter: structure and mechanical and thermal properties)
- Study of Kosterlitz--Thouless Transition of Bose Systems Governed by a Random Potential Using Quantum Monte Carlo Simulations
- 23pRB-5 "Dirty" bosons in disordered optical potentials
- 28aRE-5 "Dirty" bosons in disordered optical potentials
- Quantum Turbulence : Another da Vinci Code(Quantum Mechanics and Chaos)