URI | http://purl.tuc.gr/dl/dias/B2710AEF-4DE3-436A-9924-2F60D49AA503 | - |
Αναγνωριστικό | http://www.sciencedirect.com/science/article/pii/S0034487706800091 | - |
Αναγνωριστικό | https://doi.org/10.1016/S0034-4877(06)80009-1 | - |
Γλώσσα | en | - |
Μέγεθος | 19 pages | en |
Τίτλος | Region operators of wigner function: transformations, realizations and bounds | en |
Δημιουργός | Ellinas Dimosthenis | en |
Δημιουργός | Ελληνας Δημοσθενης | el |
Δημιουργός | Tsohantjis Ioannis | en |
Εκδότης | Elsevier | en |
Περίληψη | An integral of the Wigner function of a wave function ψ>, over some region S in classical phase space is identified as a (quasi)-probability measure (QPM) of S, and it can be expressed by the ψ> average of an operator referred to as the region operator (RO). Transformation theory is developed which provides the RO for various phase-space regions such as point, line, segment, disk and rectangle, and where all those ROs are shown to be interconnected by completely positive trace increasing maps. The latter are realized by means of unitary operators in Fock space extended by 2D vector spaces, physically identified with finite-dimensional systems. Bounds on QPMs for regions obtained by tiling with discs and rectangles are obtained by means of majorization theory. | en |
Τύπος | Peer-Reviewed Journal Publication | en |
Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
Ημερομηνία | 2015-11-09 | - |
Ημερομηνία Δημοσίευσης | 2006 | - |
Θεματική Κατηγορία | Wigner function | en |
Θεματική Κατηγορία | Region operators | en |
Θεματική Κατηγορία | Quantum mechanics | en |
Θεματική Κατηγορία | Quantum tomography | en |
Θεματική Κατηγορία | Completely positive maps | en |
Θεματική Κατηγορία | Majorization | en |
Βιβλιογραφική Αναφορά | D. Ellinas and I. Tsohantjis, "Region operators of wigner function: transformations, realizations and bounds," Rep. Math. Phys., vol. 57, no. 1, pp. 69-87, Feb. 2006. doi:10.1016/S0034-4877(06)80009-1 | en |