Naslov
Analogue surface gravity near the QCD chiral phase transition

Autori
Bilić, Neven ; Tolić, Dijana

Izvornik
Physics letters. B (0370-2693) 718 (2012), 1; 223-227

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
analogue gravity ; QCD ; chiral phase transition

Sažetak
Using the formalism of relativistic acoustic geometry we study the expanding chiral fluid in the regime of broken chiral symmetry near the QCD chiral phase transition temperature T_c. The dynamics of pions below T_c is described by the equation of motion for a massless scalar field propagating in curved spacetime similar to an open FRW universe. The metric tensor depends locally on the soft pion dispersion relation and the four-velocity of the fluid. In the neighborhood of the critical point an analogue trapped region forms with the analogue trapped horizon as its boundary. We show that the associated surface gravity diverges near the critical point as 1/(T_c-T). Hence, if the horizon forms close to the critical temperature the analogue Hawking temperature may be comparable with or even larger than the background fluid temperature.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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