{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,4,5]],"date-time":"2022-04-05T05:40:11Z","timestamp":1649137211049},"reference-count":9,"publisher":"World Scientific Pub Co Pte Lt","issue":"01","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Open Syst. Inf. Dyn."],"published-print":{"date-parts":[[2007,3]]},"abstract":"<jats:p> Fundamental studies of quantum measurements and their capacity to acquire information are typically based on scenarios in which the full Hilbert space of the measured quantum system is open to measurement interactions. In this work, we consider a class of incomplete quantum measurements \u2014 quantum subspace measurements (QSM's) \u2014 for which all measurement interactions are restricted to an arbitrary but specified subspace of the measured system Hilbert space. We define QSM's formally through a condition on the measurement Hamiltonian, obtain forms for the post-measurement states and positive operators (POVM elements) associated with QSM's acting in a specified subspace, and upper bound the accessible information for such measurements. Characteristic features of QSM's are identified and discussed. <\/jats:p>","DOI":"10.1007\/s11080-007-9035-5","type":"journal-article","created":{"date-parts":[[2007,3,1]],"date-time":"2007-03-01T17:31:27Z","timestamp":1172770287000},"page":"117-126","source":"Crossref","is-referenced-by-count":1,"title":["Quantum Subspace Measurements"],"prefix":"10.1142","volume":"14","author":[{"given":"Neal G.","family":"Anderson","sequence":"first","affiliation":[{"name":"Department of Electrical and Computer Engineering, University of Massachusetts at Amherst, Amherst, MA 01003-9292, USA"}]}],"member":"219","published-online":{"date-parts":[[2012,4,17]]},"reference":[{"key":"rf1","volume-title":"The Theory of Open Quantum Systems","author":"Brueuer H.-P.","year":"2002"},{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1002\/j.1538-7305.1948.tb01338.x"},{"key":"rf3","volume-title":"Information Theory and Reliable Communication","author":"Gallager R.","year":"1968"},{"key":"rf4","doi-asserted-by":"publisher","DOI":"10.1002\/0471200611"},{"key":"rf5","unstructured":"L. B.\u00a0Levitin, Proceedings of the Fourth Conference on Information Theory (Tashkent) (1969)\u00a0p. 111."},{"key":"rf6","first-page":"177","volume":"9","author":"Kholevo A. S.","journal-title":"Probl. Inf. Transm."},{"key":"rf7","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.76.3452"},{"key":"rf8","doi-asserted-by":"publisher","DOI":"10.1063\/1.2173682"},{"key":"rf9","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.26.1862"}],"container-title":["Open Systems &amp; Information Dynamics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.worldscientific.com\/doi\/pdf\/10.1007\/s11080-007-9035-5","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,8,7]],"date-time":"2019-08-07T04:33:08Z","timestamp":1565152388000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.worldscientific.com\/doi\/abs\/10.1007\/s11080-007-9035-5"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,3]]},"references-count":9,"journal-issue":{"issue":"01","published-online":{"date-parts":[[2012,4,17]]},"published-print":{"date-parts":[[2007,3]]}},"alternative-id":["10.1007\/s11080-007-9035-5"],"URL":"https:\/\/doi.org\/10.1007\/s11080-007-9035-5","relation":{},"ISSN":["1230-1612","1793-7191"],"issn-type":[{"value":"1230-1612","type":"print"},{"value":"1793-7191","type":"electronic"}],"subject":[],"published":{"date-parts":[[2007,3]]}}}