Bounds on entanglement in qudit subsystems
نویسندگان
چکیده
Vivien M. Kendon,* Karol Życzkowski, and William J. Munro Optics Section, Blackett Laboratory, Imperial College, London SW7 2BW, United Kingdom Center for Theoretical Physics, Polish Academy of Sciences, Al. Lotników 32/44, 02-668 Warszawa, Poland Hewlett-Packard Laboratories, Filton Road, Stoke Gifford, Bristol BS34 8QZ, United Kingdom ~Received 18 March 2002; revised manuscript received 31 May 2002; published 12 December 2002!
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The entanglement in a pure state of N qudits (d-dimensional distinguishable quantum particles) can be characterised by specifying how entangled its subsystems are. A generally mixed subsystem of m qudits is obtained by tracing over the other N−m qudits. We examine the entanglement in this mixed space of m qudits. We show that for a typical pure state of N qudits, its subsystems smaller than N/3...
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تاریخ انتشار 2002