Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime
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 stat...
| Main Authors: | , |
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| Format: | Journal article |
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American Physical Society
2016
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| _version_ | 1797086611383517184 |
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| author | Elliott, T Vedral, V |
| author_facet | Elliott, T Vedral, V |
| author_sort | Elliott, T |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-07T02:24:22Z |
| format | Journal article |
| id | oxford-uuid:a5159ebf-2cce-4563-9fd7-32586dd3722b |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:24:22Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:a5159ebf-2cce-4563-9fd7-32586dd3722b2022-03-27T02:37:59ZQuantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regimeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a5159ebf-2cce-4563-9fd7-32586dd3722bSymplectic Elements at OxfordAmerican Physical Society2016Elliott, TVedral, VFrequent 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. |
| spellingShingle | Elliott, T Vedral, V Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime |
| title | Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime |
| title_full | Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime |
| title_fullStr | Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime |
| title_full_unstemmed | Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime |
| title_short | Quantum quasi-Zeno dynamics: transitions mediated by frequent projective measurements near the Zeno regime |
| title_sort | quantum quasi zeno dynamics transitions mediated by frequent projective measurements near the zeno regime |
| work_keys_str_mv | AT elliottt quantumquasizenodynamicstransitionsmediatedbyfrequentprojectivemeasurementsnearthezenoregime AT vedralv quantumquasizenodynamicstransitionsmediatedbyfrequentprojectivemeasurementsnearthezenoregime |