PIRSA:09090003

Video URL

https://pirsa.org/09090003

Innovations in Maximum Likelihood Quantum State Tomography

Glancy, S. (2009). Innovations in Maximum Likelihood Quantum State Tomography. Perimeter Institute for Theoretical Physics. https://pirsa.org/09090003

Glancy, Scott. Innovations in Maximum Likelihood Quantum State Tomography. Perimeter Institute for Theoretical Physics, Sep. 09, 2009, https://pirsa.org/09090003 

          @misc{ scivideos_PIRSA:09090003,
            doi = {10.48660/09090003},
            url = {https://pirsa.org/09090003},
            author = {Glancy, Scott},
            keywords = {Quantum Information},
            language = {en},
            title = {Innovations in Maximum Likelihood Quantum State Tomography},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {sep},
            note = {PIRSA:09090003 see, \url{https://scivideos.org/pirsa/09090003}}
          }

Scott Glancy National Institute of Standards and Technology

Talk numberPIRSA:09090003
DOI10.48660/09090003
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

At NIST we are engaged in an experiment whose goal is to create superpositions of optical coherent states (such superpositions are sometimes called "Schroedinger cat" states). We use homodyne detection to measure the light, and we apply maximum likelihood quantum state tomography to the homodyne data to estimate the state that we have created. To assist in this analysis we have made a few improvements to quantum state tomography: we have devised a new iterative method (that has faster convergence than R*\rho*R iterations) to find the maximum likelihood state, we have formulated a stopping criterion that can upper-bound the actual maximum likelihood, and we have implemented a bias-corrected resampling strategy to estimate confidence intervals.