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- W4281387847 abstract "Time has different meanings in classical general relativity and in quantum theory. While all choices of a time function yield the same local classical geometries, quantum theories built on different time functions are not unitarily equivalent. This incompatibility is most vivid in model systems for which exact quantum descriptions in different time variables are available. One such system is a spherically symmetric, thin dust shell. In this essay we will compare the quantum theories of the shell built on proper time and on a particular coordinate time. We find wholly incompatible descriptions: whereas the shell quantum mechanics in coordinate time admits no solutions when the mass is greater than the Planck mass, its proper time quantum mechanics only admits solutions when the mass is greater than the Planck mass. The latter is in better agreement with what is expected from observation. We argue that proper time quantization provides a superior approach to the problem of time in canonical quantization." @default.
- W4281387847 created "2022-05-25" @default.
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- W4281387847 date "2022-06-27" @default.
- W4281387847 modified "2023-10-18" @default.
- W4281387847 title "Proper time quantization of a thin shell" @default.
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- W4281387847 doi "https://doi.org/10.1142/s0218271822410012" @default.
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