Abstract
The ground-state density matrix for a massless free field is traced over the degrees of freedom residing inside an imaginary sphere; the resulting entropy is shown to be proportional to the area (and not the volume) of the sphere. Possible connections with the physics of black holes are discussed.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 1993
- DOI:
- arXiv:
- arXiv:hep-th/9303048
- Bibcode:
- 1993PhRvL..71..666S
- Keywords:
-
- 05.30.-d;
- 11.10.-z;
- 97.60.Lf;
- Quantum statistical mechanics;
- Field theory;
- Black holes;
- High Energy Physics - Theory;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Lattice
- E-Print:
- 10 pages, in Plain TeX with one figure included, LBL-33754. (Revised version adds an important reference and corrects minor typos.)