Nonobservability of Early-Time Departures from Fermi's "Golden Rule"
- 25 June 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 52 (26) , 2309-2312
- https://doi.org/10.1103/physrevlett.52.2309
Abstract
The problem of the early-time decay rate of a model system is addressed by examining the evolution of the probability current at a detector located a macroscopic distance from the source. If one interprets this current as the flux of decay products, early-time departures from Fermi's "golden rule" are not, in principle, observable.Keywords
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