|
| related topics |
| {time, decoherence, evolution} |
| {spin, pulse, spins} |
| {qubit, qubits, gate} |
| {classical, space, random} |
| {information, entropy, channel} |
| {measurement, state, measurements} |
| {light, field, probe} |
| {phase, path, phys} |
| {time, wave, function} |
| {operator, operators, space} |
| {cos, sin, state} |
|
Generation and Suppression of Decoherence in Artificial Environment for
Qubit System
Yasushi Kondo, Mikio Nakahara, Shogo Tanimura, Sachiko Kitajima, Chikako Uchiyama, Fumiaki Shibata
abstract: It is known that a quantum system with finite degrees of freedom can simulate
a composite of a system and an environment if the state of the hypothetical
environment is randomized by external manipulation. We show theoretically that
any phase decoherence phenomena of a single qubit can be simulated with a
two-qubit system and demonstrate experimentally two examples: one is phase
decoherence of a single qubit in a transmission line, and the other is that in
a quantum memory. We perform NMR experiments employing a two-spin molecule and
clearly measure decoherence for both cases. We also prove experimentally that
the bang-bang control efficiently suppresses decoherence.
- oai_identifier:
- oai:arXiv.org:quant-ph/0608134
- categories:
- quant-ph
- comments:
- 25 pages, 7 figures; added references
- doi:
- 10.1143/JPSJ.76.074002
- arxiv_id:
- quant-ph/0608134
- created:
- 2006-08-17
- updated:
- 2007-02-10
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