dorsal/arxiv
View SchemaAnalysis for practical realization of number-state manipulation by number-sum Bell measurement with linear optics
| Authors | Akira Kitagawa, Katsuji Yamamoto |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0312171 |
| URL | https://arxiv.org/abs/quant-ph/0312171 |
| DOI | 10.1103/PhysRevA.70.052311 |
Abstract
We analyze the linear optical realization of number-sum Bell measurement and number-state manipulation by taking into account the realistic experimental situation, specifically imperfectness of single-photon detector. The present scheme for number-state manipulation is based on the number-sum Bell measurement, which is implemented with linear optical elements, i.e., beam splitters, phase shifters and zero-one-photon detectors. Squeezed vacuum states and coherent states are used as optical sources. The linear optical Bell state detector is formulated quantum theoretically with a probability operator measure. Then, the fidelity of manipulation and preparation of number-states, particularly for qubits and qutrits, is evaluated in terms of the quantum efficiency and dark count of single-photon detector. It is found that a high fidelity is achievable with small enough squeezing parameters and coherent state amplitudes.
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"abstract": "We analyze the linear optical realization of number-sum Bell measurement and\nnumber-state manipulation by taking into account the realistic experimental\nsituation, specifically imperfectness of single-photon detector. The present\nscheme for number-state manipulation is based on the number-sum Bell\nmeasurement, which is implemented with linear optical elements, i.e., beam\nsplitters, phase shifters and zero-one-photon detectors. Squeezed vacuum states\nand coherent states are used as optical sources. The linear optical Bell state\ndetector is formulated quantum theoretically with a probability operator\nmeasure. Then, the fidelity of manipulation and preparation of number-states,\nparticularly for qubits and qutrits, is evaluated in terms of the quantum\nefficiency and dark count of single-photon detector. It is found that a high\nfidelity is achievable with small enough squeezing parameters and coherent\nstate amplitudes.",
"arxiv_id": "quant-ph/0312171",
"authors": [
"Akira Kitagawa",
"Katsuji Yamamoto"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.052311",
"title": "Analysis for practical realization of number-state manipulation by number-sum Bell measurement with linear optics",
"url": "https://arxiv.org/abs/quant-ph/0312171"
},
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