dorsal/arxiv
View SchemaExperimental Realization of Maximum Confidence State Discrimination for the Extraction of Quantum Information
| Authors | Peter J. Mosley, Sarah Croke, Ian A. Walmsley, Stephen M. Barnett |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0610237 |
| URL | https://arxiv.org/abs/quant-ph/0610237 |
| DOI | 10.1103/PhysRevLett.97.193601 |
Abstract
We present the first experimental demonstration of the maximum confidence measurement strategy for quantum state discrimination. Applying this strategy to an arbitrary set of states assigns to each input state a measurement outcome which, when realized, gives the highest possible confidence that the state was indeed present. The theoretically optimal measurement for discriminating between three equiprobable symmetric qubit states is implemented in a polarization-based free-space interferometer. The maximum confidence in the measurement result is 2/3. This is the first explicit demonstration that an improvement in the confidence over the optimal minimum error measurement is possible for linearly dependent states.
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"abstract": "We present the first experimental demonstration of the maximum confidence\nmeasurement strategy for quantum state discrimination. Applying this strategy\nto an arbitrary set of states assigns to each input state a measurement outcome\nwhich, when realized, gives the highest possible confidence that the state was\nindeed present. The theoretically optimal measurement for discriminating\nbetween three equiprobable symmetric qubit states is implemented in a\npolarization-based free-space interferometer. The maximum confidence in the\nmeasurement result is 2/3. This is the first explicit demonstration that an\nimprovement in the confidence over the optimal minimum error measurement is\npossible for linearly dependent states.",
"arxiv_id": "quant-ph/0610237",
"authors": [
"Peter J. Mosley",
"Sarah Croke",
"Ian A. Walmsley",
"Stephen M. Barnett"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.97.193601",
"title": "Experimental Realization of Maximum Confidence State Discrimination for the Extraction of Quantum Information",
"url": "https://arxiv.org/abs/quant-ph/0610237"
},
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