Universite Claude Bernard – Lyon1

Ecole Normale Superieure De Lyon

Centre National De La Recherche Scientifique

Centre National De La Recherche Scientifique-Cnrs

Alice & Bob

Sébastien Jezouin

Théau Peronnin

Antoine Marquet

Benjamin Huard

Raphaël Lescanne

Antoine Essig

Disclosed is a system () for autonomous stabilisation of quantum states, comprising: a quantum harmonic oscillator (), an auxiliary device () dispersively coupled to the oscillator (), a dissipater (), an exciter () configured to generate first () and second () frequency combs, intended to be sent to at least one among the quantum harmonic oscillator (), the auxiliary device () and dissipater () characterised in that a first frequency difference separating two successive lines of the first frequency comb () is equal to twice a second frequency difference separating two successive lines of the second comb ().

System for autonomous stabilisation of quantum states having a predetermined parity for error correction

An electromagnetically insulated superconducting qubit device comprising an electrical conductor having a substantially planar face and an artificial magnetic conductor having a substantially planar face facing the face of said electrical conductor, and one or more qubits made on or in one of said electrical conductor and said artificial magnetic conductor, the dimensions of the constituent elements of the artificial magnetic conductor and the distance separating the face of said electrical conductor and the face of said artificial magnetic conductor being chosen so as to make an electromagnetic band gap structure which comprises the frequencies of said qubits.

Electromagnetically insulated superconducting qubit device

Control system () for a state of a quantum harmonic oscillator, comprising: —a harmonic oscillator () in a Schrödinger's cat type state, —a stabilisation device () with a predetermined parity of a number of bosons of the state, which device is configured to use first and second frequency combs each comprising at least as many rays as a mean number of bosons in the state, and —a multiphonic dissipation device () which is suitable for removing at least one pair of bosons simultaneously from the oscillator, the dissipation device being activated only between two successive time peaks of the frequency combs over a time period greater than the inverse of the product of the mean number and the inverse of the characteristic time of the multiphonic dissipation, a time period separating two activation periods being less than a characteristic loss time of a boson.

Control system for a state of a quantum harmonic oscillator

Growing community of inventors

Paris, France

Sébastien Jezouin