TY - JOUR
T1 - Adaptive versus nonadaptive strategies for quantum channel discrimination
AU - Harrow, Aram W.
AU - Hassidim, Avinatan
AU - Leung, Debbie W.
AU - Watrous, John
PY - 2010/3/31
Y1 - 2010/3/31
N2 - We provide a simple example that illustrates the advantage of adaptive over nonadaptive strategies for quantum channel discrimination. In particular, we give a pair of entanglement-breaking channels that can be perfectly discriminated by means of an adaptive strategy that requires just two channel evaluations, but for which no nonadaptive strategy can give a perfect discrimination using any finite number of channel evaluations.
AB - We provide a simple example that illustrates the advantage of adaptive over nonadaptive strategies for quantum channel discrimination. In particular, we give a pair of entanglement-breaking channels that can be perfectly discriminated by means of an adaptive strategy that requires just two channel evaluations, but for which no nonadaptive strategy can give a perfect discrimination using any finite number of channel evaluations.
UR - http://www.scopus.com/inward/record.url?scp=77950409787&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.81.032339
DO - 10.1103/PhysRevA.81.032339
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AN - SCOPUS:77950409787
SN - 1050-2947
VL - 81
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 3
M1 - 032339
ER -