Events Calendar
On multi-parameter quantum metrology
Wednesday April 29, 2015
| 4:00 pm
Tweet |
Presenter: | Nan Li, CQuIC Visiting Faculty |
|---|---|---|
| Series: | CQuIC Seminars | |
| Abstract: | In order to estimate parameters encoded in quantum states, one usually performs quantum measurements and then constructs estimators of the parameters. For a single parameter scenario, the ultimate limit for such a scheme is quantified by the Fisher information in view of the celebrated Cramer-Rao bound. Whereas, for multiple parameters the Cramer-Rao bound can be quite loose and depends sensitively on the parameterization. Here we review the Gill-Massar's bound for the multi-parameter estimators, which is invariant under re-parameterization and give tight bounds for specific scenarios, and investigate this bound explicitly for single spin, parallel spins, antiparallel spins, and Bell-diagonal states. | |
| Host: | Akimasa Miyake | |
| Location: | PAIS-2540, PAIS | |
If you need an auxiliary aid or service to attend any Department of Physics and Astronomy event, please contact the department (phone: 505 277-2616; email: