Fault-Tolerant Quantum Dynamical Decoupling
| dc.creator | Khodjasteh, K. | |
| dc.creator | Lidar, D. A. | |
| dc.date | 2004-08-20 | |
| dc.date | 2005-09-08 | |
| dc.date.accessioned | 2026-07-07T06:23:08Z | |
| dc.date.available | 2026-07-07T06:23:08Z | |
| dc.description | Dynamical decoupling pulse sequences have been used to extend coherence times in quantum systems ever since the discovery of the spin-echo effect. Here we introduce a method of recursively concatenated dynamical decoupling pulses, designed to overcome both decoherence and operational errors. This is important for coherent control of quantum systems such as quantum computers. For bounded-strength, non-Markovian environments, such as for the spin-bath that arises in electron- and nuclear-spin based solid-state quantum computer proposals, we show that it is strictly advantageous to use concatenated, as opposed to standard periodic dynamical decoupling pulse sequences. Namely, the concatenated scheme is both fault-tolerant and super-polynomially more efficient, at equal cost. We derive a condition on the pulse noise level below which concatenated is guaranteed to reduce decoherence. | |
| dc.description | 5 pages, 4 color eps figures. v3: Minor changes. To appear in Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0408128 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0408128 | |
| dc.identifier | Phys. Rev. Lett. 95, 180501 (2005) | |
| dc.identifier | doi:10.1103/PhysRevLett.95.180501 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96129 | |
| dc.subject | Quantum Physics | |
| dc.title | Fault-Tolerant Quantum Dynamical Decoupling | |
| dc.type | text |