|
| related topics |
| {entanglement, phys, rev} |
| {group, space, representation} |
| {state, states, entangled} |
| {state, phys, rev} |
| {level, atom, field} |
| {temperature, thermal, energy} |
| {trap, ion, state} |
| {operator, operators, space} |
| {states, state, optimal} |
| {bell, inequality, local} |
| {energy, gaussian, time} |
| {state, states, coherent} |
| {cavity, atom, atoms} |
|
Collective multipole-like signatures of entanglement in symmetric
N-qubit systems
A. R. Usha Devi, R. Prabhu, A. K. Rajagopal
abstract: A cogent theory of collective multipole-like quantum correlations in
symmetric multiqubit states is presented by employing SO(3) irreducible
spherical tensor representation. An arbitrary bipartite division of this system
leads to a family of inequalities to detect entanglement involving averages of
these tensors expressed in terms of the total system angular momentum operator.
Implications of this theory to the quantum nature of multipole-like
correlations of all orders in the Dicke states are deduced. A selected set of
examples illustrate these collective tests. Such tests detect entanglement in
macroscopic atomic ensembles, where individual atoms are not accessible.
- oai_identifier:
- oai:arXiv.org:quant-ph/0612210
- categories:
- quant-ph
- comments:
- REVTEX, 4 pages with 1 figure; To appear in Phys. Rev. A
- doi:
- 10.1103/PhysRevA.76.012322
- arxiv_id:
- quant-ph/0612210
- journal_ref:
- Phys. Rev. A 76, 012322 (2007)
- created:
- 2006-12-27
- updated:
- 2007-06-22
Full article ▸
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