dc.contributor.author | Wang, J | |
dc.contributor.author | Wiseman, HM | |
dc.contributor.editor | Bernd Crasemann | |
dc.date.accessioned | 2017-05-03T13:32:04Z | |
dc.date.available | 2017-05-03T13:32:04Z | |
dc.date.issued | 2001 | |
dc.date.modified | 2009-12-01T05:29:44Z | |
dc.identifier.issn | 1050-2947 | |
dc.identifier.doi | 10.1103/PhysRevA.64.063810 | |
dc.identifier.uri | http://hdl.handle.net/10072/3761 | |
dc.description.abstract | Unit-efficiency homodyne detection of the resonance fluorescence of a two-level atom collapses the quantum state of the atom to a stochastically moving point on the Bloch sphere. Recently, Hofmann, Mahler, and Hess [Phys. Rev. A 57, 4877 (1998)] showed that by making part of the coherent driving proportional to the homodyne photocurrent one can stabilize the state to any point on the bottom-half of the sphere. Here we reanalyze their proposal using the technique of stochastic master equations, allowing their results to be generalized in two ways. First, we show that any point on the upper- or lower-half, but not the equator, of the sphere may be stabilized. Second, we consider nonunit-efficiency detection, and quantify the effectiveness of the feedback by calculating the maximal purity obtainable in any particular direction in Bloch space. | |
dc.description.peerreviewed | Yes | |
dc.description.publicationstatus | Yes | |
dc.format.extent | 382262 bytes | |
dc.format.mimetype | application/pdf | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | American Physical Society | |
dc.publisher.place | USA | |
dc.publisher.uri | https://journals.aps.org/pra/abstract/10.1103/PhysRevA.64.063810 | |
dc.relation.ispartofpagefrom | 063810.1 | |
dc.relation.ispartofpageto | 063810.9 | |
dc.relation.ispartofissue | 6 | |
dc.relation.ispartofjournal | Physical Review A: Atomic, Molecular and Optical Physics | |
dc.relation.ispartofvolume | 64 | |
dc.subject.fieldofresearch | Mathematical sciences | |
dc.subject.fieldofresearch | Physical sciences | |
dc.subject.fieldofresearch | Chemical sciences | |
dc.subject.fieldofresearchcode | 49 | |
dc.subject.fieldofresearchcode | 51 | |
dc.subject.fieldofresearchcode | 34 | |
dc.title | Feedback-stabilization of an arbitrary pure state of a two-level atom | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.faculty | Griffith Sciences, Griffith Institute for Drug Discovery | |
gro.rights.copyright | © 2001 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version. | |
gro.date.issued | 2001 | |
gro.hasfulltext | Full Text | |
gro.griffith.author | Wiseman, Howard M. | |