Non-vanishing zero-temperature normal density in holographic superfluids [PDF]
Journal of High Energy Physics, 2020 The low energy and finite temperature excitations of a d + 1-dimensional system exhibiting superfluidity are well described by a hydrodynamic model with two fluid flows: a normal flow and a superfluid flow.
Blaise Goutéraux, Eric Mefford
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Finite temperature gluon propagator in Landau gauge: non-zero Matsubara frequencies and spectral densities [PDF]
EPJ Web of Conferences, 2018 We report on the lattice computation of the Landau gauge gluon propagator at finite temperature, including the non-zero Matsubara frequencies. Moreover, the corresponding Källén-Lehmann spectral density is computed, using a Tikhonov regularisation together with the Morozov discrepancy principle. Implications for gluon confinement are also discussed.
Silva, Paulo J. +3 more
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The density matrix renormalization group for a quantum spin chain at non-zero temperature [PDF]
, 1996 We apply a recent adaptation of White's density matrix renormalization group (DMRG) method to a simple quantum spin model, the dimerized XY chain, in order to assess the applicability of the DMRG to quantum systems at non-zero temperature.
Robert J. Bursill +2 more
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Properties of kaon at non-zero temperature and baryon chemical potential [PDF]
European Physical Journal A, 2022 We investigate the spectroscopic properties of the strange particle kaon in the framework of hot and dense QCD. To this end, first, we find the perturbative spectral density, which is connected with both the temperature T and the baryon chemical ...
G. Bozkır, A. Türkan, K. Azizi
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Lattice Constraints on the QCD Chiral Phase Transition at Finite Temperature and Baryon Density [PDF]
Symmetry, 2021 The thermal restoration of chiral symmetry in QCD is known to proceed by an analytic crossover, which is widely expected to turn into a phase transition with a critical endpoint as the baryon density is increased.
O. Philipsen
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Bounding the QCD Equation of State with the Lattice
Journal of High Energy Physics, 2023 The equation of state of QCD matter at high densities is relevant for neutron star structure and for neutron star mergers and has been a focus of recent work.
Guy D. Moore, Tyler Gorda
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Pion spectral properties above the chiral crossover of QCD
Journal of High Energy Physics, 2022 Spectral functions encode a wealth of information about the dynamics of any given system, and the determination of their non-perturbative characteristics is a long-standing problem in quantum field theory.
Peter Lowdon, Owe Philipsen
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Study of the theta dependence of the vacuum energy density in chiral effective Lagrangian models at zero temperature [PDF]
Physical Review D, 2018 We perform a systematic study of the modifications to the QCD vacuum energy density $\epsilon_{vac}$ in the zero-temperature case ($T=0$) caused by a small, but non-zero, value of the parameter $\theta$, using different effective Lagrangian models which ...
F. Luciano, E. Meggiolaro
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The sphaleron rate from 4D Euclidean lattices
Journal of High Energy Physics, 2023 We develop a new method to determine thermal activation rates, such as for bubble nucleation, topology change, etc., using 4-dimensional Euclidean methods. This allows nonperturbative study on the lattice. We then investigate the strong sphaleron rate in
Marc Barroso Mancha, Guy D. Moore
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Chiral symmetry restoration in the three-dimensional four-fermion model at nonzero temperature and density [PDF]
Physical Review D, 2001 The three-dimensional four-fermion model with a Z_2 chiral symmetry and N=4 fermion species in the system is investigated numerically at non-zero temparature and chemical potential. The phase diagram in the (chemical potential, temperature) plane is mapped out quantitatively.
Kogut, J. B., Strouthos, C. G.
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