39 citations · 197 across the 18 of their papers we have counts for
18 papers
Condensation of quasiparticles and density modulation beyond the superfluid critical velocity
Andras Suto, Peter Szepfalusy
We investigate the effect of a constant external velocity field on the ground state of a bosonic quasiparticle Hamiltonian. Below a critical velocity the ground state is a quasipar…
Three fluid hydrodynamics of spin-1 Bose-Einstein condensates
Gergely Szirmai, Peter Szepfalusy
We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not so strong magnetic field, or equivalently, when the gas sample is partially polarize…
Variational wave functions for homogenous Bose systems
Andras Suto, Peter Szepfalusy
We study variational wave functions of the product form, factorizing according to the wave vectors k, for the ground state of a system of bosons interacting via positive pair inter…
Phases of a polar spin-1 Bose gas in a magnetic field
Krisztian Kis-Szabo, Peter Szepfalusy, Gergely Szirmai
The two Bose--Einstein condensed phases of a polar spin-1 gas at nonzero magnetizations and temperatures are investigated. The Hugenholtz--Pines theorem is generalized to this syst…
Mapping the boundary of the first order finite temperature restoration of chiral symmetry in the m_pi-m_K--plane with a linear sigma model
T. Herpay, A. Patkos, Zs. Szep +1
The phase diagram of the three-flavor QCD is mapped out in the low mass corner of the m_pi-m_K--plane with help of the SU_L(3) x SU_R(3) linear sigma model (LSM). A novel zero temp…
Static properties and spin dynamics of the ferromagnetic spin-1 Bose gas in magnetic field
Krisztian Kis-Szabo, Peter Szepfalusy, Gergely Szirmai
Properties of spin-1 Bose gases with ferromagnetic interaction in the presence of a nonzero magnetic field are studied. The equation of state and thermodynamic quantities are worke…