Gopinath, T and Das, Ranabir and Kumar, Anil (2005) Programmable quantum-state discriminator by nuclear magnetic resonance. In: Physical Review A, 71 (4). 042307-1.
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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.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to American physical society.|
|Keywords:||Transition-Selective Pulses;Nonorthogonal States;Computer;Computation;Implementation;Nmr;Algorithm;Gate;Differentiate;Spectroscopy|
|Department/Centre:||Division of Chemical Sciences > Sophisticated Instruments Facility
Division of Physical & Mathematical Sciences > Physics
|Date Deposited:||09 Feb 2010 11:53|
|Last Modified:||19 Sep 2010 04:56|
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