{
  "date" : "2005-06-10",
  "identifier_doecontract" : "",
  "subject" : "71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CORRELATION FUNCTIONS; DATA PROCESSING; ENERGY LEVELS; ENTROPY; INFORMATION THEORY; QUANTUM COMPUTERS; QUANTUM ENTANGLEMENT; QUANTUM INFORMATION; QUANTUM MECHANICS; SUPERCONDUCTIVITY",
  "description" : "Off-diagonal long-range order (ODLRO) which is believed to be one characteristic of superconductivity is a quantum phenomenon not describable in classical mechanical terms. The quantum state constructed by {eta}-pairing demonstrates ODLRO. Entanglement is a key concept of the quantum information processing and has no classical counterpart. We study the entanglement property of the {eta}-pairing quantum state by concurrence and entropy which are two measures of the entanglement. We show that the concurrence of entanglement between one-site and the rest sites is exactly the correlation function of the ODLRO for the {eta}-pairing state in the thermodynamic limit. So, when the {eta}-pairing state is entangled, it demonstrates ODLRO and is thus in the superconducting phase, if it is a separable state, there is no ODLRO. In the thermodynamical limit, the entanglement between the M-site and other sites of the {eta}-pairing state does not vanish. Other types of ODLRO of the {eta}-pairing state are presented. We show that the behaviour of the ODLRO correlation functions is equivalent to that of the entanglement of the {eta}-pairing state. The scaling of the entropy of the entanglement for the {eta}-pairing state is studied.",
  "language" : "English",
  "identifier_report" : "",
  "publisher_sponsor" : "",
  "publisher_country" : "United Kingdom",
  "source" : "GBN",
  "purl" : "",
  "title" : "Entanglement and off-diagonal long-range order of an {eta}-pairing state",
  "type" : "Journal Article",
  "subject_related" : "",
  "relation" : "Journal Name: Journal of Physics. A, Mathematical and General; Journal Volume: 38; Journal Issue: 23; Other Information: PII: S0305-4470(05)98308-X; DOI: 10.1088/0305-4470/38/23/014; Country of input: International Atomic Energy Agency (IAEA)",
  "entry_date" : "2010-12-31",
  "subject_list" : [ "71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS", "CORRELATION FUNCTIONS", "DATA PROCESSING", "ENERGY LEVELS", "ENTROPY", "INFORMATION THEORY", "QUANTUM COMPUTERS", "QUANTUM ENTANGLEMENT", "QUANTUM INFORMATION", "QUANTUM MECHANICS", "SUPERCONDUCTIVITY" ],
  "publisher_availability" : "Available online at http://stacks.iop.org/0305-4470/38/5285/a5_23_014.pdf or at the Web site for the Journal of Physics. A, Mathematical and General (ISSN 1361-6447) http://www.iop.org/;INIS",
  "rights" : "",
  "announced_date" : "2005-12-05",
  "type_qualifier" : "",
  "has_fulltext" : false,
  "coverage" : "",
  "identifier" : "",
  "journal_volume" : "38",
  "creator" : "Heng, Fan [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)]; Lloyd, Seth [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)]",
  "site_ownership_code" : "GBN",
  "osti_id" : "20657148",
  "journal_issue" : "23",
  "resource_type" : "JOUR",
  "format" : "Medium: X; Size: page(s) 5285-5292",
  "journal_name" : [ ],
  "contributing_organizations" : "",
  "citation_location" : "https://www.osti.gov/etdeweb/biblio/20657148",
  "publication_year" : 2005,
  "subject_list_commas" : "71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS, CORRELATION FUNCTIONS, DATA PROCESSING, ENERGY LEVELS, ENTROPY, INFORMATION THEORY, QUANTUM COMPUTERS, QUANTUM ENTANGLEMENT, QUANTUM INFORMATION, QUANTUM MECHANICS, SUPERCONDUCTIVITY",
  "publisher" : "",
  "identifier_other" : "Journal ID: ISSN 0305-4470; JPHAC5; TRN: GB05P3140095903",
  "publisher_research" : "Electrical Engineering Department, University of California at Los Angeles, Los Angeles, CA 90095, USA (United States)",
  "creators_list" : [ "Heng, Fan [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)]", "Lloyd, Seth [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)]" ],
  "doi" : "https://doi.org/10.1088/0305-4470/38/23/014"
}