|
| related topics |
| {key, protocol, security} |
| {states, state, optimal} |
| {group, space, representation} |
| {field, particle, equation} |
| {alice, bob, state} |
| {information, entropy, channel} |
| {phase, path, phys} |
| {error, code, errors} |
| {state, algorithm, problem} |
| {bell, inequality, local} |
| {entanglement, phys, rev} |
| {measurement, state, measurements} |
|
Security Trade-offs in Ancilla-Free Quantum Bit Commitment in the
Presence of Superselection Rules
D. P. DiVincenzo, J. A. Smolin, B. M. Terhal
abstract: Security trade-offs have been established for one-way bit commitment in
quant-ph/0106019. We study this trade-off in two superselection settings. We
show that for an `abelian' superselection rule (exemplified by particle
conservation) the standard trade-off between sealing and binding properties
still holds. For the non-abelian case (exemplified by angular momentum
conservation) the security trade-off can be more subtle, which we illustrate by
showing that if the bit-commitment is forced to be ancilla-free an
asymptotically secure quantum bit commitment is possible.
- oai_identifier:
- oai:arXiv.org:quant-ph/0405111
- categories:
- quant-ph
- comments:
- 7 pages Latex; v2 has 8 pages and additional references and
clarifications, this paper is to appear in the New Journal of Physics
- doi:
- 10.1088/1367-2630/6/1/080
- arxiv_id:
- quant-ph/0405111
- journal_ref:
- New Journal of Physics 6, 80 (2004)
- created:
- 2004-05-19
- updated:
- 2004-06-17
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