Quantum particle-number fluctuations in a two-component Bose gas in a double-well potential

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.033614· OSTI ID:22068759

Zin, Pawel ^[1]; Oles, Bartlomiej; Sacha, Krzysztof ^[2]

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1. Soltan Institute for Nuclear Studies, Hoza 69, PL-00-681 Warsaw (Poland)
2. Instytut Fizyki imienia Mariana Smoluchowskiego and Mark Kac Complex Systems Research Center, Uniwersytet Jagiellonski, ulica Reymonta 4, PL-30-059 Krakow (Poland)

A two-component Bose gas in a double-well potential with repulsive interactions may undergo a phase separation transition if the interspecies interactions outweigh the intraspecies ones. We analyze the transition in the strong interaction limit within the two-mode approximation. Numbers of particles in each potential well are equal and constant. However, at the transition point, the ground state of the system reveals huge fluctuations of numbers of particles belonging to the different gas components; that is, the probability for observation of any mixture of particles in each potential well becomes uniform.

• OSTI ID: 22068759
• Journal Information: Physical Review. A, Vol. 84, Issue 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
BOSE-EINSTEIN GAS
FLUCTUATIONS
GROUND STATES
MIXTURES
POTENTIALS
PROBABILITY
STRONG INTERACTIONS