Počet záznamov: 1
Scalar quanta in Fermi liquids: zero sounds, instabilities, Bose condensation, and a metastable state in dilute nuclear matter
SYS 0238833 LBL ---naa--22--------450- 005 20240513120052.8 014 $a 000392025900002 $2 CCC 014 $a 000392025900002 $2 WOS CC. SCIE 014 $a 2-s2.0-85005962802 $2 SCOPUS 017 70
$a 10.1140/epja/i2016-16362-0 $2 DOI 100 $a 20170209 2016 m y slo 03 ba 101 0-
$a eng 102 $a US 200 1-
$a Scalar quanta in Fermi liquids: zero sounds, instabilities, Bose condensation, and a metastable state in dilute nuclear matter $f E. E. Kolomeitsev, D. N. Voskresensky 330 $a The spectrum of bosonic scalar-mode excitations in a normal Fermi liquid with local scalar interaction is investigated for various values and momentum dependence of the scalar Landau parameter f(0) in the particle-hole channel. For f(0) > 0 the conditions are found when the phase velocity on the spectrum of zero sound acquires a minimum at non-zero momentum. For1 < f(0) < 0 there are only damped excitations, and for f(0) <1 the spectrum becomes unstable against the growth of scalar-mode excitations. An effective Lagrangian for the scalar excitation modes is derived after performing a bosonization procedure. We demonstrate that the instability may be tamed by the formation of a static Bose condensate of the scalar modes. The condensation may occur in a homogeneous or inhomogeneous state relying on the momentum dependence of the scalar Landau parameter. We show that in the isospin-symmetric nuclear matter there may appear a metastable state at subsaturation nuclear density owing to the condensate. Then we consider a possibility of the condensation of the zero-sound-like excitations in a state with a nonzero momentum in Fermi liquids moving with overcritical velocities, provided an appropriate momentum dependence of the Landau parameter f(0)( k) > 0. We also argue that in peripheral heavy-ion collisions the Pomeranchuk instability may occur already for f(0) >1. 463 -1
$1 001 umb_un_cat*0295220 $1 011 $a 1434-6001 $1 011 $a 1434-601X $1 200 1 $a The European Physical Journal A $e Hadrons and Nuclei $v Vol. 52, no. 12 (2016), pp. [1-18] $1 210 $a Berlin $c Springer $d 2016 606 0-
$3 umb_un_auth*0119138 $a heavy ion collisions 606 0-
$3 umb_un_auth*0247154 $a equation of state 606 0-
$3 umb_un_auth*0244211 $a relativistic mean-field models 606 0-
$3 umb_un_auth*0141748 $a hydrodynamics 615 $n 53 $a Fyzika 675 $a 53 700 -1
$3 umb_un_auth*0131258 $a Kolomeitsev $b Evgeni E. $p UMBFP06 $9 99 $f 1970- $4 070 $T Katedra fyziky 701 -1
$3 umb_un_auth*0160605 $a Voskresensky $b Dmitri $9 1 $4 070 801 -0
$a SK $b BB301 $g AACR2 $9 unimarc sk T85 $x existuji fulltexy
Počet záznamov: 1