PIRSA:08080048

Phase estimation and Quantum Benchmarks for phase-covariant states

Calsamiglia, J. (2008). Phase estimation and Quantum Benchmarks for phase-covariant states. Perimeter Institute. https://pirsa.org/08080048

Calsamiglia, John. Phase estimation and Quantum Benchmarks for phase-covariant states. Perimeter Institute, Aug. 27, 2008, https://pirsa.org/08080048 

          @misc{ pirsa_PIRSA:08080048,
            doi = {10.48660/08080048},
            url = {https://pirsa.org/08080048},
            author = {Calsamiglia, John},
            keywords = {},
            language = {en},
            title = {Phase estimation and Quantum Benchmarks for phase-covariant states},
            publisher = {Perimeter Institute},
            year = {2008},
            month = {aug},
            note = {PIRSA:08080048 see, \url{https://pirsa.org}}
          }

John Calsamiglia Universitat Autònoma de Barcelona

Talk numberPIRSA:08080048
DOI10.48660/08080048
Collection
Talk Type Conference

Abstract

We study two related estimation problems involving phase- covariant quantum states. We first address the problem of phase estimation. We give optimal bounds for pure and mixed Gaussian states and find that for a fixed squeezing parameter a larger temperature can enhance the estimation fidelity. In addition we use state estimation concepts to give a benchmark that asses whether experimental implementations of quantum storage and teleportation protocols could be reproduced by classical means, i.e., by a measure and prepare strategy.