Dephasing of entangled qubits
| dc.creator | Nalbach, P. | |
| dc.date | 2001-07-06 | |
| dc.date.accessioned | 2026-07-07T02:42:04Z | |
| dc.date.available | 2026-07-07T02:42:04Z | |
| dc.description | We investigate the influence of nearby two-level systems on the dynamics of a qubit. The intrinsic decoherence is given by a coupling of both the qubit and the two-level systems to a heat bath. Assuming weak interactions between the qubit and the two-level systems we show that the dephasing of the qubit follows a multi-exponential decay. For a flat distribution of energy splittings of the two-level systems the multi-exponential behavior simplifies to a good approximation to a single exponential decay. The rate is given by the sum of the dephasing rate of the isolated qubit plus all relaxation rates for the two-level systems out of their present state. This latter contribution sums up to a rate approximately given by the mean coupling between the qubit and the two-level systems times the number of thermally active neighbors. | |
| dc.description | 5 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0107156 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0107156 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/17992 | |
| dc.subject | Statistical Mechanics | |
| dc.title | Dephasing of entangled qubits | |
| dc.type | text |