Grainger College of Engineering Seminars & Speakers

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Anthony J Leggett Institute for Condensed Matter Theory Seminar - Gil Rafael (California Institute of Technology), "Self-correcting GKP qubit and gates in a driven-dissipative circuit"

Event Type
Seminar/Symposium
Sponsor
Physics - The Anthony J Leggett Institute for Condensed Matter Theory
Location
ESB 190
Date
Apr 21, 2025   12:00 pm  
Speaker
Gil Refael, California Institute of Technology
Contact
Stephen Bullwinkel
E-Mail
bullwink@illinois.edu
Views
64
Originating Calendar
Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar

Abstract: Gottesman, Kitaev, and Preskill proposed to encode a qubit in a remarkable wavefunction, which satisfy location and momentum constraints simultaneously. Such a state offers superior error correction, but is rather hard to achieve and stabilize. We propose a circuit architecture for a dissipatively error-corrected GKP qubit. The device consists of a high-impedance LC circuit coupled to a Josephson junction and a resistor via a controllable switch. When the switch is activated via a particular family of stepwise protocols, the resistor absorbs all noise-induced entropy, resulting in dissipative error correction of both phase and amplitude errors. Furthermore, the proposed architecture provides new implementation for gates and readout. In my talk I'll introduce the GKP construction and explore our proposal for its realization. 


The speaker sign-up sheet for our guest is available HERE.

Zoom Link: https://illinois.zoom.us/my/icmt.seminar?pwd=ZU1KbnBLeXZLUmJKc0oyU205cDNDdz09

Meeting ID: 791 382 8328

Password: 106237

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