|
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 ▸
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