Journal
EPL
Volume 86, Issue 4, Pages -Publisher
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/86/47006
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Funding
- CNRS (France) [PICS 3659, PICS 4159]
- PHC Merlion grant
- National Research Foundation and the Ministry of Education (Singapore)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
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We present an exact quantum Monte Carlo study of the effect of unequal masses on pair formation in fermionic systems with population imbalance loaded into optical lattices. We have considered three forms of the attractive interaction and find in all cases that the system is unstable and collapses as the mass difference increases and that the ground state becomes an inhomogeneous collapsed state. We also address the question of canonical vs. grand canonical ensemble and its role, if any, in stabilizing certain phases. Copyright (C) EPLA, 2009
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