Single quark entropy and the Polyakov loop

Weber, Johannes Heinrich

doi:10.1142/s0217732316300408

Cited by 6 publications

(3 citation statements)

References 36 publications

(36 reference statements)

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“…Although the quark entropy (34) is not sensitive to the Z 3 center symmetry, it is expected to pinpoint a (phase) transition between the low-temperature and high-temperature regions. The entropy of the single heavy quark has a peak -a local maximum as a function of temperature at other parameters fixed -which is close to the pseudo-critical temperature of the chiral crossover [52].…”

Section: B Single-quark Entropymentioning

confidence: 69%

Finite-density QCD transition in a magnetic background field

et al. 2019

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Using numerical simulations of lattice QCD with physical quark masses, we reveal the influence of magnetic-field background on chiral and deconfinement crossovers in finite-temperature QCD at low baryonic density. In the absence of thermodynamic singularity, we identify these transitions with inflection points of the approximate order parameters: normalized light-quark condensate and renormalized Polyakov loop, respectively. We show that the quadratic curvature of the chiral transition temperature in the "temperature-chemical potential" plane depends rather weakly on the strength of the background magnetic field. At weak magnetic fields, the thermal width of the chiral crossover gets narrower as the density of the baryon matter increases, possibly indicating a proximity to a real thermodynamic phase transition. Remarkably, the curvature of the chiral thermal width flips its sign at eB fl 0.6 GeV 2 , so that above the flipping point B > B fl , the chiral width gets wider as the baryon density increases. Approximately at the same strength of magnetic field, the chiral and deconfining crossovers merge together at T ≈ 140 MeV. The phase diagram in the parameter space "temperature-chemical potential-magnetic field" is outlined, and single-quark entropy and single-quark magnetization are explored. The curvature of the chiral thermal width allows us to estimate an approximate position of the chiral critical endpoint at zero magnetic field: (T CEP c , µ CEP B ) = (100(25) MeV, 800(140) MeV).

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Section: B Single-quark Entropymentioning

confidence: 69%

Finite-density QCD transition in a magnetic background field

et al. 2019

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“…When calculated through temperature interpolation performed mass-by-mass, this shows a peak close to the corresponding pc , and this peak height decreases with quark mass. This behavior was proposed as a possible indicator of deconfinement and interpreted as a hint for the possible coincidence of the chiral and deconfinement crossover [67,68]. On the other hand the consistent description of mass and temperature variation of the HQFE and the mixed-susceptibility by the corresponding scaling functions, renders a scenario where peaks at finite quark masses eventually grow (expected at quark masses which are at least two orders of magnitude smaller than what is being used in the current day simulations) towards the chiral limit and show the characteristic ( ) cusp at [58].…”

Section: Pos(lattice2021)003 Pos(lattice2021)003mentioning

confidence: 98%

Aspects of finite temperature QCD towards the chiral limit

Lahiri¹

2022

Proceedings of the 38th International Symposium on Lattice Field Theory — PoS(LATTICE2021)

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QCD under extreme conditions has been studied for a long time, and the chiral limit has been a grey area mostly. In this write-up of my talk, I review some of the recent developments made by the community to unveil various features of QCD towards the chiral limit, which includes calculation of the chiral critical temperature and determination of the order of chiral phase transition for various numbers of flavors. Acknowledging the importance of the studies regarding the effective restoration of (1), I try to give a comprehensive overview about the various studies done in the last few years in a comparative manner to realize the current status of the community in this regard. I also discuss very recent efforts about the relevance of various energy-like observables w.r.t. the chiral phase transition.

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“…When calculated through temperature interpolation performed mass-by-mass, this shows a peak close to the corresponding 𝑇 pc , and this peak height decreases with quark mass. This behavior was proposed as a possible indicator of deconfinement and interpreted as a hint for the possible coincidence of the chiral and deconfinement crossover [67,68]. On the other hand the consistent description of mass and temperature variation of the HQFE and the mixed-susceptibility by the corresponding scaling functions, renders a scenario where peaks at finite quark masses eventually grow (expected at quark masses which are at least two orders of magnitude smaller than what is being used in the current day simulations) towards the chiral limit and show the characteristic 𝑂 (𝑁) cusp at 𝑇 𝑐 [58].…”

mentioning

confidence: 98%

Aspects of finite temperature QCD towards the chiral limit

Lahiri¹

2021

Preprint

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QCD under extreme conditions has been studied for a long time, and the chiral limit has been a grey area mostly. In this write-up of my talk, I review some of the recent developments made by the community to unveil various features of QCD towards the chiral limit, which includes calculation of the chiral critical temperature and determination of the order of chiral phase transition for various numbers of flavors. Acknowledging the importance of the studies regarding the effective restoration of 𝑈 𝐴 (1), I try to give a comprehensive overview about the various studies done in the last few years in a comparative manner to realize the current status of the community in this regard. I also discuss very recent efforts about the relevance of various energy-like observables w.r.t. the chiral phase transition.

show abstract

Single quark entropy and the Polyakov loop

Cited by 6 publications

References 36 publications

Finite-density QCD transition in a magnetic background field

Finite-density QCD transition in a magnetic background field

Aspects of finite temperature QCD towards the chiral limit

Aspects of finite temperature QCD towards the chiral limit

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