Generalizations of normal ordering and applications to quantization in classical backgrounds (CROSBI ID 114699)
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Podaci o odgovornosti
Nikolić, Hrvoje
engleski
Generalizations of normal ordering and applications to quantization in classical backgrounds
A nonlocal method of extracting the positive (or the negative) frequency part of a field, based on knowledge of a 2-point function, leads to certain natural generalizations of the normal ordering of quantum fields in classical gravitational and electromagnetic backgrounds and illuminates the origin of the recently discovered nonlocalities related to a local description of particles. A local description of particle creation by gravitational backgrounds is given, with emphasis on the case of black-hole evaporation. The formalism reveals a previously hidden relation between various definitions of the particle current and those of the energy-momentum tensor. The implications to particle creation by classical backgrounds, as well as to the relation between vacuum energy, dark matter, and cosmological constant, are discussed.
normal ordering ; quantization ; classical background
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Podaci o izdanju
37 (2)
2005.
297-311
objavljeno
0001-7701
1572-9532
10.1007/s10714-005-0020-4