|
| related topics |
| {states, state, optimal} |
| {qubit, qubits, gate} |
| {measurement, state, measurements} |
| {state, phys, rev} |
| {cos, sin, state} |
| {alice, bob, state} |
| {vol, operators, histories} |
| {bell, inequality, local} |
|
Quantum multimeters: A programmable state discriminator
Miloslav Dusek, Vladimir Buzek
abstract: We discuss a possibility to build a programmable quantum measurement device
(a "quantum multimeter"). That is, a device that would be able to perform
various desired generalized, positive operator value measure (POVM)
measurements depending on a quantum state of a "program register". As an
example, we present a "universal state discriminator". It serves for the
unambiguous discrimination of a pair of known non-orthogonal states (from a
certain set). If the two states are changed the apparatus can be switched via
the choice of the program register to discriminate the new pair of states
unambiguously. The proper POVM is determined by the state of an auxiliary
quantum system. The probability of successful discrimination is not optimal for
all pairs of non-orthogonal states from the given set. However, for some
subsets it can be very close to the optimal value.
- oai_identifier:
- oai:arXiv.org:quant-ph/0201097
- categories:
- quant-ph
- comments:
- 6 pages, 3 figures
- arxiv_id:
- quant-ph/0201097
- created:
- 2002-01-22
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