Quantum theory in external electromagnetic and gravitational fields: A comparison of some conceptual issues |
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| Authors: | T Padmanabhan |
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| Institution: | (1) Theoretical Astrophysics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005 Bombay, India |
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| Abstract: | The quantum theories of a scalar field interacting with external electromagnetic and gravitational fields respectively are
compared. It is shown that several peculiar features, like the ambiguity of particle definition, thermal effects etc., which
are thought to be special to quantum theory in curved spacetime, have analogues in the case of electromagnetism. |
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| Keywords: | Quantum theory quantum gravity Rindler frame Hawking radiation pair creation expanding universe back reaction |
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