Stability and stabilization of unstable condensates

Doron Cohen

doi:https://doi.org/10.1088/0031-8949/2015/T165/014032

Stability and stabilization of unstable condensates

Doron Cohen

Department of Physics

Ben-Gurion University of the Negev

Research output: Contribution to journal › Conference article › peer-review

Abstract

It is possible to condense a macroscopic number of bosons into a single mode. Adding interactions the question arises whether the condensate is stable. For repulsive interaction the answer is positive with regard to the ground-state, but what about a condensation in an excited mode? We discuss some results that have been obtained for a 2-mode bosonic Josephson junction, and for a 3-mode minimal-model of a superfluid circuit. Additionally, we mention the possibility to stabilize an unstable condensate by introducing periodic or noisy driving into the system: this is due to the Kapitza and the Zeno effects.

Original language	American English
Article number	014032
Journal	PHYSICA SCRIPTA
Volume	2015
Issue number	T165
DOIs	https://doi.org/10.1088/0031-8949/2015/T165/014032
State	Published - 7 Oct 2015
Event	Frontiers of Quantum and Mesoscopic Thermodynamics, FQMT 2013 - Prague, Czech Republic Duration: 29 Jul 2013 → 3 Aug 2013

Keywords

Bose-Hubbard
Kapitza
Zeno
condensation
quantum chaos
stability
superuidity

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Mathematical Physics
Condensed Matter Physics

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https://doi.org/10.1088/0031-8949/2015/T165/014032

Cite this

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title = "Stability and stabilization of unstable condensates",

abstract = "It is possible to condense a macroscopic number of bosons into a single mode. Adding interactions the question arises whether the condensate is stable. For repulsive interaction the answer is positive with regard to the ground-state, but what about a condensation in an excited mode? We discuss some results that have been obtained for a 2-mode bosonic Josephson junction, and for a 3-mode minimal-model of a superfluid circuit. Additionally, we mention the possibility to stabilize an unstable condensate by introducing periodic or noisy driving into the system: this is due to the Kapitza and the Zeno effects.",

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N2 - It is possible to condense a macroscopic number of bosons into a single mode. Adding interactions the question arises whether the condensate is stable. For repulsive interaction the answer is positive with regard to the ground-state, but what about a condensation in an excited mode? We discuss some results that have been obtained for a 2-mode bosonic Josephson junction, and for a 3-mode minimal-model of a superfluid circuit. Additionally, we mention the possibility to stabilize an unstable condensate by introducing periodic or noisy driving into the system: this is due to the Kapitza and the Zeno effects.

AB - It is possible to condense a macroscopic number of bosons into a single mode. Adding interactions the question arises whether the condensate is stable. For repulsive interaction the answer is positive with regard to the ground-state, but what about a condensation in an excited mode? We discuss some results that have been obtained for a 2-mode bosonic Josephson junction, and for a 3-mode minimal-model of a superfluid circuit. Additionally, we mention the possibility to stabilize an unstable condensate by introducing periodic or noisy driving into the system: this is due to the Kapitza and the Zeno effects.

KW - Bose-Hubbard

KW - Kapitza

KW - Zeno

KW - condensation

KW - quantum chaos

KW - stability

KW - superuidity

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DO - https://doi.org/10.1088/0031-8949/2015/T165/014032

M3 - Conference article

SN - 0281-1847

VL - 2015

JO - PHYSICA SCRIPTA

JF - PHYSICA SCRIPTA

IS - T165

M1 - 014032

T2 - Frontiers of Quantum and Mesoscopic Thermodynamics, FQMT 2013

Y2 - 29 July 2013 through 3 August 2013

ER -

Stability and stabilization of unstable condensates

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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