|
| related topics |
| {state, states, coherent} |
| {photon, photons, single} |
| {measurement, state, measurements} |
| {state, phys, rev} |
| {states, state, optimal} |
| {key, protocol, security} |
| {equation, function, exp} |
| {cos, sin, state} |
| {qubit, qubits, gate} |
| {information, entropy, channel} |
| {state, algorithm, problem} |
| {vol, operators, histories} |
| {energy, gaussian, time} |
| {error, code, errors} |
|
Implementation of projective measurements with linear optics and
continuous photon counting
Masahiro Takeoka, Masahide Sasaki, Peter van Loock, Norbert Lütkenhaus
abstract: We investigate the possibility of implementing a given projection measurement
using linear optics and arbitrarily fast feedforward based on the continuous
detection of photons. In particular, we systematically derive the so-called
Dolinar scheme that achieves the minimum error discrimination of binary
coherent states. Moreover, we show that the Dolinar-type approach can also be
applied to projection measurements in the regime of photonic-qubit signals. Our
results demonstrate that for implementing a projection measurement with linear
optics, in principle, unit success probability may be approached even without
the use of expensive entangled auxiliary states, as they are needed in all
known (near-)deterministic linear-optics proposals.
- oai_identifier:
- oai:arXiv.org:quant-ph/0410133
- categories:
- quant-ph
- comments:
- 11 pages, 2 figures, updated to the published version
- doi:
- 10.1103/PhysRevA.71.022318
- arxiv_id:
- quant-ph/0410133
- journal_ref:
- Phys. Rev. A 71, 022318 (2005)
- created:
- 2004-10-18
- updated:
- 2005-03-03
Full article ▸
|
|
| related documents |
| 0003053v3 |
| 0307156v2 |
| 0312048v1 |
| 0701162v3 |
| 0403103v1 |
| 0605200v1 |
| 0605002v1 |
| 0608113v3 |
| 0206198v2 |
| 0702165v2 |
| 0603024v2 |
| 0112088v1 |
| 0609005v1 |
| 0407175v1 |
| 0607189v3 |
| 0508012v2 |
| 0703040v3 |
| 0601091v2 |
| 9903058v2 |
| 0602077v2 |
| 0502003v1 |
| 0503050v1 |
| 0503206v2 |
| 0602037v2 |
| 0411164v1 |
|