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SUMMARY:Duke and NC State Collaborative Quantum Computing Seminars
DESCRIPTION:Duke & NC State  will host a Collaborative Quantum Computing Seminar Sept 3\, 2021! \nTalk Title: Quantum computing with rotation-symmetric bosonic codes \nSpeaker: Josh Combes\, University of Colorado\, Boulder \nAbstract: Bosonic mode error-correcting codes are error-correcting codes where a qubit (or qudit) is encoded into one or multiple bosonic modes\, i.e.\, quantum oscillators with an infinite Hilbert space. In the first part of this talk I will give an introduction to codes that have a phase space translation symmetry\, i.e. the Gottesman-Kitaev-Preskill aka GKP\, and codes that have a rotation symmetry. Moreover\, I will survey the impressive experimental progress on these codes. The second part of the talk I focus on single-mode codes that obey rotation symmetry in phase space\, such as the well-known Cat and Binomial codes. I will introduce a universal scheme for this class of codes based only on simple and experimentally well-motivated interactions. The scheme is fault-tolerant in the sense that small errors are guaranteed to remain small under the considered gates. I will also introduce a fault-tolerant error correction scheme based on cross-Kerr interactions and imperfect destructive phase measurement (e.g.\, a marginal of heterodyne). Remarkably\, the error correction scheme approaches the optimal recovery map for Cat and Binomial codes when the auxiliary modes are error-free. We numerically compute break-even thresholds under loss and dephasing\, with ideal auxiliary systems.  If time permits I will discuss the search for optimized codes and progress towards genuine fault tolerance. \nThis is a Hybrid Collaborative Event with NC State and Duke. In Person location for NC State is Venture Place\, 2nd Floor\, Large Classroom. \nREGISTRATION: Form Link  \nFor more information email: \nquantumcomputing@ncsu.edu
URL:https://quantum.ncsu.edu/ibm-quantum/event/announcing-duke-nc-state-collaborative-quantum-computing-seminars/
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