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Article: Collective modes in a two-band superfluid of ultracold alkaline-earth-metal atoms close to an orbital Feshbach resonance
Title | Collective modes in a two-band superfluid of ultracold alkaline-earth-metal atoms close to an orbital Feshbach resonance |
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Authors | |
Issue Date | 2017 |
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/pra/ |
Citation | Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2017, v. 95 n. 4, article no. 041603 , p. 1-5 How to Cite? |
Abstract | We discuss the collective modes in an alkaline-earth-metal Fermi gas close to an orbital Feshbach resonance. Unlike the usual Feshbach resonance, the orbital Feshbach resonance in alkaline-earth-metal atoms realizes a two-band superfluid system where the fermionic nature of both the open and the closed channel has to be taken into account. We show that, apart from the usual Anderson-Bogoliubov mode which corresponds to the oscillation of total density, there also appears the long-sought Leggett mode corresponding to the oscillation of relative density between the two channels. The existence of the phonon and the Leggett modes and their evolution are discussed in detail. We show how these collective modes are reflected in the density response of the system. |
Persistent Identifier | http://hdl.handle.net/10722/240949 |
ISSN | 2023 Impact Factor: 2.6 2023 SCImago Journal Rankings: 1.081 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhang, Y | - |
dc.contributor.author | Ding, S | - |
dc.contributor.author | Zhang, S | - |
dc.date.accessioned | 2017-05-22T09:19:59Z | - |
dc.date.available | 2017-05-22T09:19:59Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Physical Review A: covering atomic, molecular, and optical physics and quantum information, 2017, v. 95 n. 4, article no. 041603 , p. 1-5 | - |
dc.identifier.issn | 2469-9926 | - |
dc.identifier.uri | http://hdl.handle.net/10722/240949 | - |
dc.description.abstract | We discuss the collective modes in an alkaline-earth-metal Fermi gas close to an orbital Feshbach resonance. Unlike the usual Feshbach resonance, the orbital Feshbach resonance in alkaline-earth-metal atoms realizes a two-band superfluid system where the fermionic nature of both the open and the closed channel has to be taken into account. We show that, apart from the usual Anderson-Bogoliubov mode which corresponds to the oscillation of total density, there also appears the long-sought Leggett mode corresponding to the oscillation of relative density between the two channels. The existence of the phonon and the Leggett modes and their evolution are discussed in detail. We show how these collective modes are reflected in the density response of the system. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/pra/ | - |
dc.relation.ispartof | Physical Review A: covering atomic, molecular, and optical physics and quantum information | - |
dc.rights | Copyright 2017 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevA.95.041603 | - |
dc.title | Collective modes in a two-band superfluid of ultracold alkaline-earth-metal atoms close to an orbital Feshbach resonance | - |
dc.type | Article | - |
dc.identifier.email | Zhang, Y: yicaizha@hku.hk | - |
dc.identifier.email | Zhang, S: shizhong@hku.hk | - |
dc.identifier.authority | Zhang, S=rp01661 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevA.95.041603 | - |
dc.identifier.scopus | eid_2-s2.0-85018265194 | - |
dc.identifier.hkuros | 272179 | - |
dc.identifier.volume | 95 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | article no. 041603, p. 1 | - |
dc.identifier.epage | article no. 041603, p. 5 | - |
dc.identifier.isi | WOS:000400252100001 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 2469-9926 | - |