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DTSTAMP:20261019T095213Z
LAST-MODIFIED:20200715T192538Z
DTSTART:20200717T150000Z
DTEND:20200717T160000Z
UID:event2350@bu.edu
URL:http://physics.bu.edu/internal/events/show/2350
SUMMARY:A general quantum advantage in quantum networks
DESCRIPTION:Featuring Xiangyi Meng\n\nPart of the Departmental Seminars.\n\
	nEstablishing long-distance quantum correlations in large-scale quantum net
	works (QN) is a key and timely challenge for developing secure quantum comm
	unication systems. In this talk\, I will explain how entanglement transmiss
	ion in QN can be comprehended by classical percolation theory\, which indic
	ates the existence of a non-trivial threshold---in terms of the entanglemen
	t per link---for establishing sufficient entanglement between two arbitrari
	ly distant nodes in QN. Interestingly\, however\, such a traditional compre
	hension is not complete. Indeed\, a lower entanglement transmission thresho
	ld than what classical percolation theory predicts does exist\, as demonstr
	ated on specific network topologies\, essentially exhibiting a "quantum adv
	antage".\nNaturally\, we ask: Is such a "quantum advantage" general regardl
	ess of topology? Is there a unique minimum threshold for entanglement trans
	mission which tells how much "quantum advantage" one can exploit at most? I
	f so\, can the threshold be governed by new statistics other than classical
	 percolation? I will address these questions by proving that there is one (
	and only) minimum threshold for infinite-range entanglement transmission in
	 QN by optimally establishing concurrence---a key measure of bipartite enta
	nglement---between two distant nodes. A fundamentally new statistical theor
	y\, concurrence percolation theory (ConPT) is then introduced\, which shows
	 that the existence of ``quantum advantage'' is indeed general on any QN.\n
	\n\n----\n\n\nJoin Zoom Meeting\nhttps://bostonu.zoom.us/j/98605833542?pwd=
	dUU3OXJ4K1FyeFZtV2dQV2Fqa0ZYUT09\n\nMeeting ID: 986 0583 3542\nPassword: 67
	4403
LOCATION: \, \, 
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