|
| related topics |
| {state, phys, rev} |
| {key, protocol, security} |
| {entanglement, phys, rev} |
| {state, states, entangled} |
| {alice, bob, state} |
| {state, algorithm, problem} |
| {qubit, qubits, gate} |
| {energy, state, states} |
| {time, decoherence, evolution} |
|
Optimization of security costs in nested purification protocol
Radim Filip
abstract: We analyse security costs in one segment of nested purification protocol in a
large quantum cryptography network, employing the quantum switchers and
repeaters. We demonstrate that exponential or even super-exponential grow of
entanglement resources occurs in dependence on number of the network switchers.
For this reason, an optimization in the nested strategy is suggested,
preventing a stronger than the exponential grow of entanglement resources.
- oai_identifier:
- oai:arXiv.org:quant-ph/0202171
- categories:
- quant-ph
- comments:
- 4 pages and 3 figures
- arxiv_id:
- quant-ph/0202171
- created:
- 2002-02-28
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