Classical capacity of fermionic product channels
| dc.creator | Bravyi, Sergey | |
| dc.date | 2005-07-29 | |
| dc.date.accessioned | 2026-07-07T06:13:17Z | |
| dc.date.available | 2026-07-07T06:13:17Z | |
| dc.description | We study multi-qubit quantum channels that can be represented as a product of one-mode fermionic attenuation channels. An explicit formula for the classical capacity $C_1$ and for the minimum output entropy $S_{min}$ of these channels is proposed. We compute $S_{min}$ analytically for any number of qubits under assumption that the minimum is achieved on a Gaussian input. Apart from that, a simple numerical method for evaluating $S_{min}$ is developed. The method is applicable to any channels that are sufficiently noisy. For fermionic product channels the proposed formula for $S_{min}$ agrees with the numerical results with a precision about $10^{-9}$. | |
| dc.description | 12 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0507282 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0507282 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/93051 | |
| dc.subject | Quantum Physics | |
| dc.title | Classical capacity of fermionic product channels | |
| dc.type | text |