A new local invariant for quantum gates
| dc.creator | Koponen, Laura | |
| dc.creator | Bergholm, Ville | |
| dc.creator | Salomaa, Martti M. | |
| dc.date | 2005-03-16 | |
| dc.date.accessioned | 2026-07-07T07:50:31Z | |
| dc.date.available | 2026-07-07T07:50:31Z | |
| dc.description | In this paper we study the properties of two-qubit gates. We review the most common parameterizations for the local equivalence classes of two-qubit gates and the connections between them. We then introduce a new discrete local invariant, namely the number of local degrees of freedom that a gate can bind. The value of this invariant is calculated analytically for all the local equivalence classes of two-qubit gates. We find that almost all two-qubit gates can bind the full six local degrees of freedom and are in this sense more effective than the controlled-NOT gate, which only can bind four local degrees of freedom. | |
| dc.description | 8 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0503141 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0503141 | |
| dc.identifier | Quant. Inf. Comp. 6, 58 (2006) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/125188 | |
| dc.subject | Quantum Physics | |
| dc.title | A new local invariant for quantum gates | |
| dc.type | text |