Continuous quantum measurement for general Gaussian unravelings can exist
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Quantum measurements and the associated state changes are properly described in the language of instruments. We investigate the properties of a time continuous family of instruments associated with the recently introduced class of general Gaussian non-Markovian stochastic Schrödinger equations. In this article we find that when the covariance matrix for the Gaussian noise satisfies a particular δ-function constraint, the measurement interpretation is possible for a class of models with self-adjoint coupling operator. This class contains, for example the spin-boson and quantum Brownian motion models with colored bath correlation functions. Remarkably, due to quantum memory effects the reduced state, in general, does not obey a closed form master equation while the unraveling has a time continuous measurement interpretation.
Details
Originalsprache | Englisch |
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Seitenumfang | 8 |
Fachzeitschrift | Physical Review Research |
Jahrgang | 2 |
Publikationsstatus | Veröffentlicht - 2020 |
Peer-Review-Status | Ja |
Externe IDs
Scopus | 85110037364 |
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ORCID | /0000-0002-7806-3525/work/142234188 |
Schlagworte
Schlagwörter
- Gaussian unravelings, non-markovian, Schröder equations