TY - JOUR

T1 - Massless Thirring model in curved space

T2 - Thermal states and conformal anomaly

AU - Birrell, N. D.

AU - Davies, P. C.W.

PY - 1978/1/1

Y1 - 1978/1/1

N2 - The massless Thirring model of a self-interacting fermion field in a curved two-dimensional background spacetime is considered. The exact operator solution for the fields and the equation for the two-point function are given and used to examine the radiation emitted by a two-dimensional black hole. The radiation is found to be thermal in nature, confirming general predictions to this effect. We compute the particle spectrum of the Thirring fermions at finite temperature in Minkowski space and point out errors in a previous attempt at this calculation. Finally we calculate the vacuum expectation value of the stress tensor in an arbitrary two-dimensional spacetime by exploiting the connection between the thermal Hawking radiation from a black hole and the value of the so-called conformal trace anomaly. The latter is also computed quite independently, using dimensional regularization, from general considerations of the renormalization group. We find the stress tensor to be identical to the free-fermion case. Some discussion of the significance of this work for the second law of thermodynamics and black-hole entropy is given.

AB - The massless Thirring model of a self-interacting fermion field in a curved two-dimensional background spacetime is considered. The exact operator solution for the fields and the equation for the two-point function are given and used to examine the radiation emitted by a two-dimensional black hole. The radiation is found to be thermal in nature, confirming general predictions to this effect. We compute the particle spectrum of the Thirring fermions at finite temperature in Minkowski space and point out errors in a previous attempt at this calculation. Finally we calculate the vacuum expectation value of the stress tensor in an arbitrary two-dimensional spacetime by exploiting the connection between the thermal Hawking radiation from a black hole and the value of the so-called conformal trace anomaly. The latter is also computed quite independently, using dimensional regularization, from general considerations of the renormalization group. We find the stress tensor to be identical to the free-fermion case. Some discussion of the significance of this work for the second law of thermodynamics and black-hole entropy is given.

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U2 - 10.1103/PhysRevD.18.4408

DO - 10.1103/PhysRevD.18.4408

M3 - Article

AN - SCOPUS:4244153352

VL - 18

SP - 4408

EP - 4421

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 12

ER -