A. A. Isayev, “Two-body correlation functions in nuclear matter with neutron-proton condensate”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2005, Volume 82, Issue 9,Pages <nobr>627

This article is cited in 3 papers

FIELDS, PARTICLES, AND NUCLEI

Two-body correlation functions in nuclear matter with neutron-proton condensate

A. A. Isayev^ab

^a Kharkov Institute of Physics and Technology, 61108 Kharkov, Ukraine
^b Kharkov National University, 61077 Kharkov, Ukraine

Abstract: The density, spin and isospin correlation functions in nuclear matter with a neutron-proton condensate are calculated to study the possible signatures of the BEC-BCS crossover in low-density region. It is shown that criterion of the crossover (Phys. Rev. Lett. 95, 090402 (2005)), consisting in the change of the sign of the density correlation function at low momentum transfer, fails to describe correctly the density-driven BEC-BCS transition at finite isospin asymmetry or finite temperature. As an unambiguous signature of the BEC-BCS transition, there can be used the presence (BCS regime) or absence (BEC regime) of the singularity in the momentum distribution of the quasiparticle density of states.

PACS: 21.30.Fe, 21.65.+f, 71.10.Ay

Received: 13.09.2005
Revised: 29.09.2005

Language: English