|
| related topics |
| {states, state, optimal} |
| {state, states, entangled} |
| {qubit, qubits, gate} |
| {entanglement, phys, rev} |
| {measurement, state, measurements} |
| {key, protocol, security} |
| {equation, function, exp} |
| {classical, space, random} |
| {group, space, representation} |
| {state, states, coherent} |
| {vol, operators, histories} |
|
Measuring Polynomial Invariants of Multi-Party Quantum States
M. S. Leifer, N. Linden, A. Winter
abstract: We present networks for directly estimating the polynomial invariants of
multi-party quantum states under local transformations. The structure of these
networks is closely related to the structure of the invariants themselves and
this lends a physical interpretation to these otherwise abstract mathematical
quantities. Specifically, our networks estimate the invariants under local
unitary (LU) transformations and under stochastic local operations and
classical communication (SLOCC). Our networks can estimate the LU invariants
for multi-party states, where each party can have a Hilbert space of arbitrary
dimension and the SLOCC invariants for multi-qubit states. We analyze the
statistical efficiency of our networks compared to methods based on estimating
the state coefficients and calculating the invariants.
- oai_identifier:
- oai:arXiv.org:quant-ph/0308008
- categories:
- quant-ph
- comments:
- 8 pages, 4 figures, RevTex4, v2 references updated
- doi:
- 10.1103/PhysRevA.69.052304
- arxiv_id:
- quant-ph/0308008
- journal_ref:
- Physical Review A 69, 052304 (2004)
- created:
- 2003-08-01
- updated:
- 2003-08-15
Full article ▸
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