|
| related topics |
| {key, protocol, security} |
| {state, states, coherent} |
| {photon, photons, single} |
| {alice, bob, state} |
| {state, phys, rev} |
| {information, entropy, channel} |
| {states, state, optimal} |
| {algorithm, log, probability} |
| {phase, path, phys} |
| {state, states, entangled} |
| {cos, sin, state} |
| {qubit, qubits, gate} |
|
Experimentally realizable quantum comparison of coherent states and its
applications
Erika Andersson, Marcos Curty, Igor Jex
abstract: When comparing quantum states to each other, it is possible to obtain an
unambiguous answer, indicating that the states are definitely different,
already after a single measurement. In this paper we investigate comparison of
coherent states, which is the simplest example of quantum state comparison for
continuous variables. The method we present has a high success probability, and
is experimentally feasible to realize as the only required components are beam
splitters and photon detectors. An easily realizable method for quantum state
comparison could be important for real applications. As examples of such
applications we present a "lock and key" scheme and a simple scheme for quantum
public key distribution.
- oai_identifier:
- oai:arXiv.org:quant-ph/0601130
- categories:
- quant-ph
- comments:
- 14 pages, 5 figures, version one submitted to PRA. Version two is the
final accepted version
- doi:
- 10.1103/PhysRevA.74.022304
- arxiv_id:
- quant-ph/0601130
- journal_ref:
- Phys. Rev. A 74, 022304 (2006)
- created:
- 2006-01-19
- updated:
- 2006-08-15
Full article ▸
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