dorsal/arxiv
View SchemaQuantum Communication Protocol Employing Weak Measurements
| Authors | Alonso Botero, Benni Reznik |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9908006 |
| URL | https://arxiv.org/abs/quant-ph/9908006 |
| DOI | 10.1103/PhysRevA.61.050301 |
| Journal | Phys. Rev. A 61, 050301 (R), (2000). |
Abstract
We propose a communication protocol exploiting correlations between two events with a definite time-ordering: a) the outcome of a {\em weak measurement} on a spin, and b) the outcome of a subsequent ordinary measurement on the spin. In our protocol, Alice, first generates a "code" by performing weak measurements on a sample of N spins. The sample is sent to Bob, who later performs a post-selection by measuring the spin along either of two certain directions. The results of the post-selection define the "key', which he then broadcasts publicly. Using both her previously generated code and this key, Alice is able to infer the {\em direction} chosen by Bob in the post-selection. Alternatively, if Alice broadcasts publicly her code, Bob is able to infer from the code and the key the direction chosen by Alice for her weak measurement. Two possible experimental realizations of the protocols are briefly mentioned.
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"abstract": "We propose a communication protocol exploiting correlations between two\nevents with a definite time-ordering: a) the outcome of a {\\em weak\nmeasurement} on a spin, and b) the outcome of a subsequent ordinary measurement\non the spin. In our protocol, Alice, first generates a \"code\" by performing\nweak measurements on a sample of N spins.\n The sample is sent to Bob, who later performs a post-selection by measuring\nthe spin along either of two certain directions. The results of the\npost-selection define the \"key\u0027, which he then broadcasts publicly. Using both\nher previously generated code and this key, Alice is able to infer the {\\em\ndirection} chosen by Bob in the post-selection. Alternatively, if Alice\nbroadcasts publicly her code, Bob is able to infer from the code and the key\nthe direction chosen by Alice for her weak measurement. Two possible\nexperimental realizations of the protocols are briefly mentioned.",
"arxiv_id": "quant-ph/9908006",
"authors": [
"Alonso Botero",
"Benni Reznik"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.61.050301",
"journal_ref": "Phys. Rev. A 61, 050301 (R), (2000).",
"title": "Quantum Communication Protocol Employing Weak Measurements",
"url": "https://arxiv.org/abs/quant-ph/9908006"
},
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