Negative energy density for a DiracMaxwell field
Abstract
It is well known that there can be negative energy densities in quantum field theory. Most of the work done in this area has involved free noninteracting systems. In this paper we show how a quantum state with negative energy density can be formulated for a Dirac field interacting with an Electromagnetic field. It will be shown that, for this case, there exist quantum states whose average energy density over an arbitrary volume is a negative number with an arbitrarily large magnitude.
 Publication:

arXiv eprints
 Pub Date:
 July 1999
 arXiv:
 arXiv:grqc/9907060
 Bibcode:
 1999gr.qc.....7060S
 Keywords:

 General Relativity and Quantum Cosmology
 EPrint:
 12 pages