|
| related topics |
| {states, state, optimal} |
| {state, states, coherent} |
| {operator, operators, space} |
| {bell, inequality, local} |
| {state, phys, rev} |
| {group, space, representation} |
| {qubit, qubits, gate} |
| {measurement, state, measurements} |
| {photon, photons, single} |
| {state, states, entangled} |
| {information, entropy, channel} |
| {alice, bob, state} |
|
On the realization of Bell observables
Giacomo Mauro D'Ariano, Paolo Perinotti
abstract: We show how Bell observables on a bipartite quantum system can be obtained by
local observables via a controlled-unitary transformation. For continuous
variables this result holds for the Bell observable corresponding to the
non-conventional heterodyne measurement on two radiation modes, which is
connected through a 50-50 beam-splitter to two local observables given by
single-mode homodyne measurements. A simple scheme for a controlled-unitary
transformation of continuous variables is also presented, which needs only two
squeezers, a parametric downconverter and two beam splitters.
- oai_identifier:
- oai:arXiv.org:quant-ph/0406077
- categories:
- quant-ph
- comments:
- 9 pages, elsart, 1 figure
- doi:
- 10.1016/j.physleta.2004.07.006
- arxiv_id:
- quant-ph/0406077
- journal_ref:
- Phys. Lett. A, Vol. 329/3 pp 188-192 (2004)
- created:
- 2004-06-11
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