Ground-state phase diagram of a dipolar condensate with quantum fluctuations

Year: 2016

Authors: Bisset RN., Wilson RM., Baillie D., Blakie PB

Autors Affiliation: Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Povo, Italy; US Naval Acad, Dept Phys, Annapolis, MD 21402 USA; Univ Otago, Dept Phys, Ctr Quantum Sci, Dunedin, New Zealand; Univ Otago, Dodd Walls Ctr Photon & Quantum Technol, Dunedin, New Zealand.

Abstract: We consider the ground state properties of a trapped dipolar condensate under the influence of quantum fluctuations. We show that this system can undergo a phase transition from a low density condensate state to a high density droplet state, which is stabilized by quantum fluctuations. The energetically favored state depends on the geometry of the confining potential, the number of atoms, and the two-body interactions. We develop a simple variational ansatz and validate it against full numerical solutions. We produce a phase diagram for the system and present results relevant to current experiments with dysprosium and erbium condensates.

Journal/Review: PHYSICAL REVIEW A

Volume: 94 (3)      Pages from: 33619-1  to: 33619-10

More Information: We would like to thank F. Dalfovo and S. Stringari for useful discussions. R.N.B. acknowledges support by the QUIC grant of the Horizon2020 FET program and by Provincia Autonoma di Trento. R.M.W. acknowledges partial support from the National Science Foundation under Grant No. PHYS-1516421. D.B. and P.B.B. acknowledge the contribution of NZ eScience Infrastructure (NeSI) high-performance computing facilities and support from the Marsden Fund of the Royal Society of New Zealand.
KeyWords: Bose-einstein Condensation; Temperature; Gases
DOI: 10.1103/PhysRevA.94.033619

Citations: 156
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