|
| related topics |
| {photon, photons, single} |
| {state, phys, rev} |
| {measurement, state, measurements} |
| {equation, function, exp} |
| {state, states, entangled} |
| {cos, sin, state} |
| {operator, operators, space} |
| {state, states, coherent} |
|
Projection Measurement of the Maximally Entangled N-Photon State for a
Demonstration of N-Photon de Broglie Wavelength
F. W. Sun, Z. Y. Ou, G. C. Guo
abstract: We construct a projection measurement process for the maximally entangled
N-photon state (the NOON-state) with only linear optical elements and
photodetectors. This measurement process will give null result for any N-photon
state that is orthogonal to the NOON state. We examine the projection process
in more detail for N=4 by applying it to a four-photon state from type-II
parametric down-conversion. This demonstrates an orthogonal projection
measurement with a null result. This null result corresponds to a dip in a
generalized Hong-Ou-Mandel interferometer for four photons. We find that the
depth of the dip in this arrangement can be used to distinguish a genuine
entangled four-photon state from two separate pairs of photons. We next apply
the NOON state projection measurement to a four-photon superposition state from
two perpendicularly oriented type-I parametric down-conversion processes. A
successful NOON state projection is demonstrated with the appearance of the
four-photon de Broglie wavelength in the interference fringe pattern.
- oai_identifier:
- oai:arXiv.org:quant-ph/0511189
- categories:
- quant-ph
- comments:
- 8 pages, 3 figures, new title, some content change, replaced Fig.1
- doi:
- 10.1103/PhysRevA.73.023808
- arxiv_id:
- quant-ph/0511189
- created:
- 2005-11-18
- updated:
- 2005-12-11
Full article ▸
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