Výsledky vyhľadávania
Názov Scalar quanta in Fermi liquids: zero sounds, instabilities, Bose condensation, and a metastable state in dilute nuclear matter Aut.údaje E. E. Kolomeitsev, D. N. Voskresensky Autor Kolomeitsev Evgeni E. 1970- (99%) UMBFP06 - Katedra fyziky
Spoluautori Voskresensky Dmitri (1%)
Zdroj.dok. The European Physical Journal A : Hadrons and Nuclei. Vol. 52, no. 12 (2016), pp. [1-18]. - Berlin : Springer, 2016 Kľúč.slová heavy ion collisions equation of state relativistic mean-field models hydrodynamics Jazyk dok. angličtina Krajina Spojené štáty Systematika 53 Anotácia 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. Kategória publikačnej činnosti ADC Číslo archívnej kópie 38091 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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Názov Stimulation of static deconfined medium by multiple hard partons Aut.údaje Martin Schulc, Boris Tomášik Autor Schulc Martin (50%)
Spoluautori Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Zdroj.dok. Journal of Physics G: Nuclear and Particle Physics. Vol. 40, no. 12 (2013), pp. [1-11]. - Bristol : IOP Publishing, 2013 Kľúč.slová heavy ion collisions hydrodynamics Jazyk dok. angličtina Krajina Veľká Británia Systematika 53 Kategória publikačnej činnosti ADC Číslo archívnej kópie 27640 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný
Názov Freeze-out by bulk viscosity driven instabilities Aut.údaje Giorgio Torrieri, Boris Tomášik, Igor Mishustin Autor Torrieri Giorgio (70%)
Spoluautori Tomášik Boris 1972- (15%) UMBFP06 - Katedra fyziky
Mishustin Igor (15%)
Zdroj.dok. Acta Physica Polonica B. Vol. 39, no. 7 (2008), pp. 1733-1744. - Kraków : Jagellonian University, 2008 Kľúč.slová heavy ion collisions deconfinement phase transition hydrodynamics bulk viscosity freeze-out Jazyk dok. angličtina Krajina Poľsko Systematika 539 Anotácia We describe a new scenario (first introduced in [G.Torrieri, B.Tomasik and I.Mishustin, Phys. Rev. C 77, 034903 (2008)]) for freezeout in heavy ion collisions that could solve the lingering problems associated with the so-called HBT puzzle. We argue that bulk viscosity increases as $T$ approaches $T_c$. The fluid {then} becomes unstable against small perturbations, and fragments into clusters of a size much smaller than the total size of the system. These clusters maintain the pre-existing outward-going flow, as a spray of droplets, but develop no flow of their own, and hadronize by evaporation. We show that this scenario can explain HBT data and suggest how it can be experimentally tested Kategória publikačnej činnosti ADC Číslo archívnej kópie 9792 Kategória ohlasu RAJAGOPAL, Krishna - TRIPURANENI, Nilesh. Bulk viscosity and cavitation in boost-invariant hydrodynamic expansion. In Journal of high energy physics. ISSN 1029-8479, 2010, no. 3, article no. 94025.
MATEOS, David - TRANCANELLI, Diego. Anisotropic N=4 Super-Yang-Mills Plasma and Its Instabilities. In Physical review letters. ISSN 0031-9007, 2011, vol. 107, no. 10, article no. 101601.
MATEOS, David - TRANCANELLI, Diego. Thermodynamics and instabilities of a strongly coupled anisotropic plasma. In Journal of high energy physics. ISSN 1029-8479, 2011, no. 7, article no. 054.
CHANDRA, Vinod. Bulk viscosity of anisotropically expanding hot QCD plasma. In Physical review D. ISSN 1550-7998, 2011, vol. 84, no. 9, article no. 018.
Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika nerozpoznaný