PIRSA:14020138

Video URL

https://pirsa.org/14020138

Probabilistic protocols in quantum information

Combes, J. (2014). Probabilistic protocols in quantum information. Perimeter Institute for Theoretical Physics. https://pirsa.org/14020138

Combes, Joshua. Probabilistic protocols in quantum information. Perimeter Institute for Theoretical Physics, Feb. 13, 2014, https://pirsa.org/14020138 

          @misc{ scivideos_PIRSA:14020138,
            doi = {10.48660/14020138},
            url = {https://pirsa.org/14020138},
            author = {Combes, Joshua},
            keywords = {Quantum Information},
            language = {en},
            title = {Probabilistic protocols in quantum information},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2014},
            month = {feb},
            note = {PIRSA:14020138 see, \url{https://scivideos.org/pirsa/14020138}}
          }

Joshua Combes University of Colorado Boulder

Talk numberPIRSA:14020138
DOI10.48660/14020138
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Probabilistic protocols in quantum information are an attempt to improve performance by occasionally reporting a better result than could be expected from a deterministic protocol. Here we show that probabilistic protocols can never improve performance beyond the quantum limits on the corresponding deterministic protocol. To illustrate this result we examine three common probabilistic protocols: probabilistic amplification, weak value amplification, and probabilistic metrology. In each of these protocols we show explicitly that the optimal deterministic protocol is better than the corresponding probabilistic protocol when the probabilistic nature of the protocol is correctly accounted for.