Confinement and superfluidity in one-dimensional degenerate fermionic cold atoms
The physical properties of arbitrary half-integer spins F = N - (1/2) fermionic cold atoms trapped in a one-dimensional optical lattice are investigated by means of a low-energy approach. Two different superfluid phases are found for F > or = (3/2) depending on whether a discrete symmetry is spontaneously broken or not: an unconfined BCS pairing phase and a confined molecular-superfluid instability made of 2N fermions. We propose an experimental distinction between these phases for a gas trapped in an annular geometry. The confined-unconfined transition is shown to belong to the Z(N) generalized Ising universality class. We discuss the possible Mott phases at (1/2) filling.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2005 |
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| Erschienen: |
2005 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:95 |
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| Enthalten in: |
Physical review letters - 95(2005), 24 vom: 09. Dez., Seite 240402 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Lecheminant, P [VerfasserIn] |
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| Themen: |
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| Anmerkungen: |
Date Completed 21.06.2006 Date Revised 30.12.2005 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM159839793 |
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| 245 | 1 | 0 | |a Confinement and superfluidity in one-dimensional degenerate fermionic cold atoms |
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| 500 | |a Date Revised 30.12.2005 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a The physical properties of arbitrary half-integer spins F = N - (1/2) fermionic cold atoms trapped in a one-dimensional optical lattice are investigated by means of a low-energy approach. Two different superfluid phases are found for F > or = (3/2) depending on whether a discrete symmetry is spontaneously broken or not: an unconfined BCS pairing phase and a confined molecular-superfluid instability made of 2N fermions. We propose an experimental distinction between these phases for a gas trapped in an annular geometry. The confined-unconfined transition is shown to belong to the Z(N) generalized Ising universality class. We discuss the possible Mott phases at (1/2) filling | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Boulat, E |e verfasserin |4 aut | |
| 700 | 1 | |a Azaria, P |e verfasserin |4 aut | |
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