|
related topics |
{states, state, optimal} |
{measurement, state, measurements} |
{time, decoherence, evolution} |
{alice, bob, state} |
{operator, operators, space} |
{let, theorem, proof} |
|
Deterministic Quantum State Transformations
Anthony Chefles
abstract: We derive a necessary condition for the existence of a completely-positive,
linear, trace-preserving map which deterministically transforms one finite set
of pure quantum states into another. This condition is also sufficient for
linearly-independent initial states. We also examine the issue of quantum
coherence, that is, when such operations maintain the purity of superpositions.
If, in any deterministic transformation from one linearly-independent set to
another, even a single, complete superposition of the initial states maintains
its purity, the initial and final states are related by a unitary
transformation.
- oai_identifier:
- oai:arXiv.org:quant-ph/9911086
- categories:
- quant-ph
- comments:
- Minor cosmetic changes
- doi:
- 10.1016/S0375-9601(00)00291-7
- arxiv_id:
- quant-ph/9911086
- created:
- 1999-11-19
- updated:
- 2000-03-07
Full article ▸
|
|
related documents |
0208080v2 |
0004071v2 |
0601017v4 |
0305117v3 |
0603168v1 |
0602112v1 |
9712019v3 |
0201097v1 |
0001091v5 |
0309161v1 |
0509100v3 |
9804001v1 |
0308089v2 |
9804064v1 |
0308008v2 |
0504016v2 |
0410054v1 |
0502103v2 |
9811036v1 |
0312024v2 |
0610196v2 |
9701028v1 |
0605041v4 |
0304117v2 |
0610058v2 |
|