dc.contributor.author | Ralph, TC | |
dc.contributor.author | Lund, AP | |
dc.contributor.author | Wiseman, HM | |
dc.date.accessioned | 2017-05-03T11:51:15Z | |
dc.date.available | 2017-05-03T11:51:15Z | |
dc.date.issued | 2005 | |
dc.date.modified | 2009-10-08T06:30:35Z | |
dc.identifier.issn | 1464-4266 | |
dc.identifier.doi | 10.1088/1464-4266/7/10/007 | |
dc.identifier.uri | http://hdl.handle.net/10072/4932 | |
dc.description.abstract | Photon counting induces an effective non-linear optical phase shift in certain states derived by linear optics from single photons. Although this non-linearity is non-deterministic, it is sufficient in principle to allow scalable linear optics quantum computation (LOQC). The most obvious way to encode a qubit optically is as a superposition of the vacuum and a single photon in one mode-so-called 'single-rail' logic. Until now this approach was thought to be prohibitively expensive (in resources) compared to 'dual-rail' logic where a qubit is stored by a photon across two modes. Here we attack this problem with real-time feedback control, which can realize a quantum-limited phase measurement on a single mode, as has been recently demonstrated experimentally. We show that with this added measurement resource, the resource requirements for single-rail LOQC are not substantially different from those of dual-rail LOQC. In particular, with adaptive phase measurements an arbitrary qubit state a|0> + 1> can be prepared deterministically. | |
dc.description.peerreviewed | Yes | |
dc.description.publicationstatus | Yes | |
dc.format.extent | 97519 bytes | |
dc.format.mimetype | application/pdf | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Institute of Physics Publishing Ltd | |
dc.publisher.place | Bristol, UK | |
dc.publisher.uri | https://iopscience.iop.org/article/10.1088/1464-4266/7/10/007 | |
dc.relation.ispartofstudentpublication | N | |
dc.relation.ispartofpagefrom | S245 | |
dc.relation.ispartofpageto | S249 | |
dc.relation.ispartofjournal | Journal of Optics B: Quantum and semiclassical optics | |
dc.relation.ispartofvolume | 7 | |
dc.rights.retention | Y | |
dc.subject.fieldofresearchcode | 240402 | |
dc.title | Adaptive Phase Measurements in Linear Optical Quantum Computation | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.rights.copyright | © 2005 Institute of Physics Publishing. 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 | 2005 | |
gro.hasfulltext | Full Text | |
gro.griffith.author | Wiseman, Howard M. | |