Measuring quantum entanglement without prior state reconstruction
| dc.creator | Horodecki, Pawel | |
| dc.date | 2001-11-14 | |
| dc.date | 2002-12-05 | |
| dc.date.accessioned | 2026-07-07T06:03:02Z | |
| dc.date.available | 2026-07-07T06:03:02Z | |
| dc.description | It is shown that, despite strong nonlinearity, entanglement of formation of two-qubit state can be measured without prior state reconstruction. Collective measurements on small number of copies are provided that allow to determine quantum concurrence {\it via} estimation of only {\it four} parameters. It is also pointed out that another entanglement measure based on so called negativity can also be measured in similar way. The result is related to general problem: what kind of information can be extracted efficiently from unknown quantum state ? | |
| dc.description | Improved version. For two qubits number of estimated parameters reduced to four; title changed; list of references extended. RevTeX | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0111082 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0111082 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/89838 | |
| dc.subject | Quantum Physics | |
| dc.title | Measuring quantum entanglement without prior state reconstruction | |
| dc.type | text |