TY - JOUR
T1 - Programmable quantum-state discriminator by nuclear magnetic resonance
AU - Gopinath, T.
AU - Das, Ranabir
AU - Kumar, Anil
PY - 2005/4
Y1 - 2005/4
N2 - A programmable quantum-state discriminator is implemented by using nuclear magnetic resonance. We use a two-qubit spin-1/2 system, one for the data qubit and one for the ancilla (program) qubit. This device does the unambiguous (error-free) discrimination of a pair of states of the data qubit that are symmetrically located about a fixed state. The device is used to discriminate both linearly polarized states and elliptically polarized states. The maximum probability of successful discrimination is achieved by suitably preparing the ancilla qubit. It is also shown that the probability of discrimination depends on the angle of the unitary operator of the protocol and ellipticity of the data qubit state.
AB - A programmable quantum-state discriminator is implemented by using nuclear magnetic resonance. We use a two-qubit spin-1/2 system, one for the data qubit and one for the ancilla (program) qubit. This device does the unambiguous (error-free) discrimination of a pair of states of the data qubit that are symmetrically located about a fixed state. The device is used to discriminate both linearly polarized states and elliptically polarized states. The maximum probability of successful discrimination is achieved by suitably preparing the ancilla qubit. It is also shown that the probability of discrimination depends on the angle of the unitary operator of the protocol and ellipticity of the data qubit state.
UR - http://www.scopus.com/inward/record.url?scp=26944487657&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=26944487657&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.71.042307
DO - 10.1103/PhysRevA.71.042307
M3 - Article
AN - SCOPUS:26944487657
SN - 1050-2947
VL - 71
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 042307
ER -