Phase structure and critical phenomena in 2-flavor QCD by holography

Zhao, Yan-Qing; He, Song; Hou, Defu; Li, Li; Li, Zhibin

doi:10.1103/PhysRevD.109.086015

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Phase structure and critical phenomena in 2-flavor QCD by holography

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He, Song
Canonical and Covariant Dynamics of Quantum Gravity, AEI Golm, MPI for Gravitational Physics, Max Planck Society;

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Citation

Zhao, Y.-Q., He, S., Hou, D., Li, L., & Li, Z. (2024). Phase structure and critical phenomena in 2-flavor QCD by holography. Physical Review D, 109(8): 086015. doi:10.1103/PhysRevD.109.086015.

Cite as: https://hdl.handle.net/21.11116/0000-000D-D502-0

Abstract

We explore the phase structure of Quantum Chromodynamics (QCD) with two
dynamical quark flavors at finite temperature and baryon chemical potential,
employing the non-perturbative gauge/gravity duality approach. Our
gravitational model is tailored to align with state-of-the-art lattice data
regarding the thermal properties of multi-flavor QCD. Following a rigorous
parameter calibration to match equations of state and the QCD trace anomaly at
zero chemical potential derived from cutting-edge lattice QCD simulations, we
investigate thermodynamic quantities and order parameters. We predict the
location of the critical endpoint (CEP) at $(\mu_{\text{CEP}},
T_{\text{CEP}})=(219,182)$ MeV at which a line of first-order phase transitions
terminate. We compute critical exponents associated with the CEP and find that
they almost coincide with the critical exponents of the quantum 3D Ising model.