期刊
PHYSICAL REVIEW A
卷 94, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.94.012118
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资金
- Engineering and Physical Sciences Research Council (EPSRC) (UK) DTA
- National Research Foundation (Singapore)
- Ministry of Education (Singapore)
- EPSRC
- Templeton Foundation (US)
- Leverhulme Trust (UK)
- Oxford Martin School, University of Oxford (UK)
- Wolfson College, University of Oxford (UK)
Frequent observation of a quantum system leads to quantum Zeno physics, where the system evolution is constrained to states commensurate with the measurement outcome. We show that, more generally, the system can evolve between such states through higher-order virtual processes that pass through states outside the measurement subspace. We derive effective Hamiltonians to describe this evolution, and the dependence on the time between measurements. We demonstrate application of this phenomena to prototypical quantum many-body system examples, spin chains and atoms in optical lattices, where it facilitates correlated dynamical effects.
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