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Measurements continuous in time and a posteriori states in quantum mechanics
Open accessAbstract
Measurements continuous in time have been consistently introduced in quantum mechanics and applications worked out, mainly in quantum optics. In this context a quantum filtering theory has been developed giving the reduced state after a measurement when a certain trajectory of the measured observables is registered (the a posteriori states). In this paper a new derivation of filtering equations is presented for the cases of counting processes and of measurement processes of diffusive type. It is also shown that the equation for the a posteriori dynamics in the diffusive case can be obtained, by a suitable limit, from that in the counting case. Moreover, the paper is intended to clarify the meaning of the various concepts involved and to discuss the connections among them. As an illustration of the theory, simple models are worked out.
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Citations
Cites
On the generators of quantum dynamical semigroups
Lindblad, G. (1976) · Communications in Mathematical Physics · doi:10.1007/bf01608499 · Cited by 7,548 · cited 2×
“Let L0(t) be a Liouvillian the generator of a completely positive dynamics [ 29 ] on T (H) � and Jj(t), j = 1;:::;d, be completely positive maps on”
BackgroundAn operational approach to quantum probability
Davies, E. B., & Lewis, J. T. (1970) · Communications in Mathematical Physics · doi:10.1007/bf01647093 · Cited by 888
Quantum measuring processes of continuous observables
Ozawa, M. (1984) · Journal of Mathematical Physics · doi:10.1063/1.526000 · Cited by 504
Cited by
The quantum-jump approach to dissipative dynamics in quantum optics
Plenio, M. B., & Knight, P. L. (1998) · Reviews of Modern Physics · doi:10.1103/revmodphys.70.101 · Cited by 1,515
Entangling Distant Atoms by Interference of Polarized Photons
Feng, X.-L., Zhang, Z.-M., Li, X.-D., Gong, S.-Q., & Xu, Z.-Z. (2003) · Physical Review Letters · doi:10.1103/physrevlett.90.217902 · Cited by 227
Percival, I. C. (1994) · Proceedings of the Royal Society of London Series A Mathematical and Physical Sciences · doi:10.1098/rspa.1994.0135 · Cited by 115
Stochastic path integrals and open quantum systems
Strunz, W. T. (1996) · Physical Review A · doi:10.1103/physreva.54.2664 · Cited by 87
Metadata
- Authors
- Barchielli, A., & Belavkin, V. P.
- Venue
- Journal of Physics A: Mathematical and General
- Publisher
- IOP Publishing
- Published
- 1991-04-07
- Volume
- 24
- Issue
- 7
- Pages
- 1495-1514
- ISSN
- 0305-4470 (ISSN-L)
- 1361-6447
- OpenAlex
- W2088145502
- Cited by
- 316
- References
- 3
- FWCI
- 4.80
- Type
- journal article
- Language
- en
- Open access
- green
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- Barchielli, A., & Belavkin, V. P. (1991). Measurements continuous in time and a posteriori states in quantum mechanics. Journal of Physics A: Mathematical and General. https://doi.org/10.1088/0305-4470/24/7/022
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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