TY - JOUR
T1 - Null values and quantum state discrìmination
AU - Zilberberg, Oded
AU - Romito, Alessandro
AU - Starling, David J.
AU - Howland, Gregory A.
AU - Broadbent, Curtis J.
AU - Howell, John C.
AU - Gefen, Yuval
PY - 2013/4/25
Y1 - 2013/4/25
N2 - We present a measurement protocol for discriminating between two different quantum states of a qubit with high fidelity. The protocol, called null value, is comprised of a projective measurement performed on the system with a small probability (also known as partial collapse), followed by a tuned postselection. We report on an optical experimental implementation of the scheme. We show that our protocol leads to an amplified signal-to-noise ratio (as compared with a straightforward strong measurement) when discerning between the two quantum states.
AB - We present a measurement protocol for discriminating between two different quantum states of a qubit with high fidelity. The protocol, called null value, is comprised of a projective measurement performed on the system with a small probability (also known as partial collapse), followed by a tuned postselection. We report on an optical experimental implementation of the scheme. We show that our protocol leads to an amplified signal-to-noise ratio (as compared with a straightforward strong measurement) when discerning between the two quantum states.
UR - https://www.scopus.com/pages/publications/84877770251
U2 - 10.1103/PhysRevLett.110.170405
DO - 10.1103/PhysRevLett.110.170405
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AN - SCOPUS:84877770251
SN - 0031-9007
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
M1 - 170405
ER -