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| related topics |
| {states, state, optimal} |
| {group, space, representation} |
| {alice, bob, state} |
| {information, entropy, channel} |
| {key, protocol, security} |
| {entanglement, phys, rev} |
| {spin, pulse, spins} |
| {cos, sin, state} |
| {field, particle, equation} |
| {state, phys, rev} |
| {error, code, errors} |
| {temperature, thermal, energy} |
| {qubit, qubits, gate} |
|
Efficient use of quantum resources for the transmission of a reference
frame
G. Chiribella, G. M. D'Ariano, P. Perinotti, M. F. Sacchi
abstract: We propose a covariant protocol for transmitting reference frames encoded on
$N$ spins, achieving sensitivity $N^{-2}$ without the need of a pre-established
reference frame and without using entanglement between sender and receiver. The
protocol exploits the use of equivalent representations, which were overlooked
in the previous literature.
- oai_identifier:
- oai:arXiv.org:quant-ph/0405095
- categories:
- quant-ph
- comments:
- 4 pages, no figures; added new references and improved introduction.
Accepted for publication on PRL
- doi:
- 10.1103/PhysRevLett.93.180503
- arxiv_id:
- quant-ph/0405095
- journal_ref:
- Phys. Rev. Lett 93, 180503 (2004)
- created:
- 2004-05-17
- updated:
- 2004-08-24
Full article ▸
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