Abstract
A unified theory is given of dynamically modified decay and decoherence in driven two-level and multilevel quantum systems that are weakly coupled to arbitrary finitetemperature reservoirs and undergo random phase fluctuations. Criteria for the optimization of decoherence suppression and the limitations of this approach are obtained. For a driven qubit that is strongly coupled to the continuum edge of reservoir's spectrum, we demonstrate that only an appropriately ordered sequence of abrupt changes of the resonance frequency, near the continuum edge, can effectively protect the qubit state from decoherence.
| Original language | English |
|---|---|
| Pages (from-to) | 285-317 |
| Number of pages | 33 |
| Journal | Quantum Information & Computation |
| Volume | 5 |
| Issue number | 4-5 |
| Publication status | Published - Jul 2005 |
All Science Journal Classification (ASJC) codes
- Theoretical Computer Science
- Nuclear and High Energy Physics
- Statistical and Nonlinear Physics
- General Physics and Astronomy
- Mathematical Physics
- Computational Theory and Mathematics