Speaker
Description
It is nowadays theoretically understood that in Quantum Mechanics (QM) the exponential decay is only an approximation. Deviations have been experimentally measured both at short and at long times. In turn, the non-exponential decay is responsible of the (also measured) Quantum Zeno Effect. Yet, an interesting open question, presented in this talk, is the emergence of non-exponential decay in the context of relativistic quantum field theory (QFT). Namely, this is the correct environment for creation and annihilation of particles. By using standard QFT techniques, we aim to evaluate the short-time behavior in a straightforward calculation. We shall find that non-exponential decay is also present in each QFT but is typically very small. An interesting exception is that of superrenormalizable theory, where deviations can be more sizable.
Summary
Non-exponential decay in Quantum Field theory
| Topic: | Mini-workshop: Quantum Foundations and Quantum Information |
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