### Abstract

The pseudopotential theory is extended to the Bogoliubov-de Gennes equations to determine the excess energy when one atom is added to the trapped superfluid Fermi system with even number of atoms. Particular attention is paid to systems being at the Feshbach resonance point. The results for relatively small particle numbers are in harmony with the Monte Carlo calculations, but are also relevant for systems with larger particle numbers. Concerning the additional one-quasiparticle state we define and determine two new universal numbers to characterize its widths.

Original language | English |
---|---|

Article number | 37005 |

Journal | EPL |

Volume | 97 |

Issue number | 3 |

DOIs | |

Publication status | Published - Feb 2012 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

*EPL*,

*97*(3), [37005]. https://doi.org/10.1209/0295-5075/97/37005

**Calculation of the even-odd energy difference in superfluid Fermi systems using the pseudopotential theory.** / Csords, A.; Homa, G.; Szépfalusy, P.

Research output: Contribution to journal › Article

*EPL*, vol. 97, no. 3, 37005. https://doi.org/10.1209/0295-5075/97/37005

}

TY - JOUR

T1 - Calculation of the even-odd energy difference in superfluid Fermi systems using the pseudopotential theory

AU - Csords, A.

AU - Homa, G.

AU - Szépfalusy, P.

PY - 2012/2

Y1 - 2012/2

N2 - The pseudopotential theory is extended to the Bogoliubov-de Gennes equations to determine the excess energy when one atom is added to the trapped superfluid Fermi system with even number of atoms. Particular attention is paid to systems being at the Feshbach resonance point. The results for relatively small particle numbers are in harmony with the Monte Carlo calculations, but are also relevant for systems with larger particle numbers. Concerning the additional one-quasiparticle state we define and determine two new universal numbers to characterize its widths.

AB - The pseudopotential theory is extended to the Bogoliubov-de Gennes equations to determine the excess energy when one atom is added to the trapped superfluid Fermi system with even number of atoms. Particular attention is paid to systems being at the Feshbach resonance point. The results for relatively small particle numbers are in harmony with the Monte Carlo calculations, but are also relevant for systems with larger particle numbers. Concerning the additional one-quasiparticle state we define and determine two new universal numbers to characterize its widths.

UR - http://www.scopus.com/inward/record.url?scp=84857074324&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84857074324&partnerID=8YFLogxK

U2 - 10.1209/0295-5075/97/37005

DO - 10.1209/0295-5075/97/37005

M3 - Article

AN - SCOPUS:84857074324

VL - 97

JO - Europhysics Letters

JF - Europhysics Letters

SN - 0295-5075

IS - 3

M1 - 37005

ER -