UNSPECIFIED (1994) PAIR FLUCTUATIONS IN THE GROUND-STATE OF A 2-DIMENSIONAL ATTRACTIVE FERMI GAS. In: International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors IV (M2S-HTSC IV), GRENOBLE, FRANCE, JUL 05-09, 1994. Published in: PHYSICA C, 235 (Part 4). pp. 2353-2354.

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Abstract

The excitation spectrum of pair fluctuations in the ground state of a dilute two-dimensional (2D) attractive Fermi-gas is studied for different coupling regimes. In the strong-coupling limit the spectrum has the Bogolubov form, but in the weak-coupling regime there are two types of the pair excitations (different from two-fermion scattering states): (i) long-wavelength collective mode with the cutoff at momentum q(c) similar to 1/xi(0), where xi(0) is the pair size, and (ii) pair excitations with q greater than or equal to root 8m mu.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICA C
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0921-4534
Date:	December 1994
Volume:	235
Number:	Part 4
Number of Pages:	2
Page Range:	pp. 2353-2354
Publication Status:	Published
Title of Event:	International Conference on Materials and Mechanisms of Superconductivity - High Temperature Superconductors IV (M2S-HTSC IV)
Location of Event:	GRENOBLE, FRANCE
Date(s) of Event:	JUL 05-09, 1994
URI:	http://wrap.warwick.ac.uk/id/eprint/20034

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