Quantum multimeters: A programmable state discriminator
| Authors | |
|---|---|
| Year of publication | 2002 |
| Type | Article in Periodical |
| Magazine / Source | Physical Review A |
| MU Faculty or unit | |
| Citation | |
| Field | Theoretical physics |
| Keywords | quantum information; quantum measurements; quantum processors |
| Description | We propose a ``programmable'' quantum device that is able to perform a specific generalized measurement from a certain set of measurements depending on a quantum state of a ``program register''. The state of the program register sets the measurement device to perform a specific measurement. In particular, we study a situation when the programmable measurement device serves for the unambiguous discrimination between non-orthogonal states. The particular pair of states that can be unambiguously discriminated is specified by the state of a program qubit. The probability of successful discrimination is not optimal for all admissible pairs. However, for some subsets it can be very close to the optimal value. |
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