dorsal/arxiv
View SchemaMinimum-error discrimination between a pure and a mixed two-qubit state
| Authors | Ulrike Herzog |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307038 |
| URL | https://arxiv.org/abs/quant-ph/0307038 |
| DOI | 10.1088/1464-4266/6/3/005 |
Abstract
The problem of discriminating with minimum error between two mixed quantum states is reviewed, with emphasize on the detection operators necessary for performing the measurement. An analytical result is derived for the minimum probability of errors in deciding whether the state of a quantum system is either a given pure state or a uniform statistical mixture of any number of mutually orthogonal states. The result is applied to two-qubit states, and the minimum error probabilities achievable by collective and local measurements on the qubits are compared.
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"abstract": "The problem of discriminating with minimum error between two mixed quantum\nstates is reviewed, with emphasize on the detection operators necessary for\nperforming the measurement. An analytical result is derived for the minimum\nprobability of errors in deciding whether the state of a quantum system is\neither a given pure state or a uniform statistical mixture of any number of\nmutually orthogonal states. The result is applied to two-qubit states, and the\nminimum error probabilities achievable by collective and local measurements on\nthe qubits are compared.",
"arxiv_id": "quant-ph/0307038",
"authors": [
"Ulrike Herzog"
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"doi": "10.1088/1464-4266/6/3/005",
"title": "Minimum-error discrimination between a pure and a mixed two-qubit state",
"url": "https://arxiv.org/abs/quant-ph/0307038"
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