dorsal/arxiv
View SchemaAscertaining the Values of $\sigma_x$, $\sigma_y$, and $\sigma_z$ of a Polarization Qubit
| Authors | Oliver Schulz, Ruprecht Steinhübl, Markus Weber, Berthold-Georg Englert, Christian Kurtsiefer, Harald Weinfurter |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0209127 |
| URL | https://arxiv.org/abs/quant-ph/0209127 |
| DOI | 10.1103/PhysRevLett.90.177901 |
| Journal | Physical Review Letters, vol. 90, art. 177901 (2003) |
Abstract
In the 1987 spin retrodiction puzzle of Vaidman, Aharonov, and Albert one is challenged to ascertain the values of $\sigma_x$, $\sigma_y$, and $\sigma_z$ of a spin-1/2 particle by utilizing entanglement. We report the experimental realization of a quantum-optical version in which the outcome of an intermediate polarization projection is inferred by exploiting single-photon two-qubit quantum gates. The experimental success probability is consistently above the 90.2% threshold of the optimal one-qubit strategy, with an average success probability of 95.6%.
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"abstract": "In the 1987 spin retrodiction puzzle of Vaidman, Aharonov, and Albert one is\nchallenged to ascertain the values of $\\sigma_x$, $\\sigma_y$, and $\\sigma_z$ of\na spin-1/2 particle by utilizing entanglement. We report the experimental\nrealization of a quantum-optical version in which the outcome of an\nintermediate polarization projection is inferred by exploiting single-photon\ntwo-qubit quantum gates. The experimental success probability is consistently\nabove the 90.2% threshold of the optimal one-qubit strategy, with an average\nsuccess probability of 95.6%.",
"arxiv_id": "quant-ph/0209127",
"authors": [
"Oliver Schulz",
"Ruprecht Steinh\u00fcbl",
"Markus Weber",
"Berthold-Georg Englert",
"Christian Kurtsiefer",
"Harald Weinfurter"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.90.177901",
"journal_ref": "Physical Review Letters, vol. 90, art. 177901 (2003)",
"title": "Ascertaining the Values of $\\sigma_x$, $\\sigma_y$, and $\\sigma_z$ of a Polarization Qubit",
"url": "https://arxiv.org/abs/quant-ph/0209127"
},
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