Decoherence of an $n$-qubit quantum memory
| dc.creator | Gorin, Thomas | |
| dc.creator | Pineda, Carlos | |
| dc.creator | Seligman, Thomas H. | |
| dc.date | 2007-03-20 | |
| dc.date.accessioned | 2026-07-07T08:54:55Z | |
| dc.date.available | 2026-07-07T08:54:55Z | |
| dc.description | We analyze decoherence of a quantum register in the absence of non-local operations i.e. of $n$ non-interacting qubits coupled to an environment. The problem is solved in terms of a sum rule which implies linear scaling in the number of qubits. Each term involves a single qubit and its entanglement with the remaining ones. Two conditions are essential: first decoherence must be small and second the coupling of different qubits must be uncorrelated in the interaction picture. We apply the result to a random matrix model, and illustrate its reach considering a GHZ state coupled to a spin bath. | |
| dc.description | 4 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0703190 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0703190 | |
| dc.identifier | Phys. Rev. Lett. 99, 240405 (2007) | |
| dc.identifier | doi:10.1103/PhysRevLett.99.240405 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/146114 | |
| dc.subject | Quantum Physics | |
| dc.title | Decoherence of an $n$-qubit quantum memory | |
| dc.type | text |