Coherence control for qubits
- We study the influence of an external driving field on the coherence properties of a qubit under the influence of bit-flip noise. In the presence of driving, two paradigmatic cases are considered: (i) a field that results for a suitable choice of the parameters in so-called coherent destruction of tunneling and (ii) one that commutes with the static qubit Hamiltonian. In each case, we give for high-frequency driving a lower bound for the coherence time. This reveals the conditions under which the external fields can be used for coherence stabilization.
| Author: | Karen M. Fonseca RomeroORCiD, Sigmund KohlerORCiDGND, Peter HänggiORCiDGND |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-2962 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/362 |
| Type: | Preprint |
| Language: | English |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2006/09/08 |
| Tag: | Decoherence; Quantum computation; Driven systems |
| GND-Keyword: | Qubit; Kohärenz; Quantencomputer |
| Source: | erschienen in: Chemical Physics 296, 307–314 (2004; DOI: 10.1016/j.chemphys.2003.09.015; URL: www.elsevier.com/locate/chemphys |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
