Conference in French: Quantum mechanical electrical circuits
by Daniel ESTEVE
3 February 2020 - 3 February 2020
Paris, France
Abstract:
Any physical system being in theory able to reach the quantum regime, searching for the quantum properties of non-microscopic systems developed noticeably for the mechanical variables on nano-objects, and for the electrical variables of non-dissipative superconducting circuits.
The discovery in the mid-1990s that quantum mechanics provides resources for performing computational tasks beyond reach of classical computers triggered intense research of the basic units, namely the quantum bit circuits, needed for implementing a quantum computer. I will describe the most advanced superconducting quantum bits and the elementary quantum processors made with them. I will explain the scalability challenge for making a useful quantum computer, and the solutions envisioned for solving it. I will introduce the hybrid route based on microscopic spins coupled to quantum electrical circuits that we presently develop in our team.
References:
• Antibunched Photons Emitted by a dc-Biased Josephson Junction, Rolland, C. et al., PHYSICAL REVIEW LETTERS 122, 186804, 2019; DOI: 10.1103/PhysRevLett.122.186804
• Inductive-detection electron-spin resonance spectroscopy with 65 spins/root Hz sensitivity, Probst, S. et al., APPLIED PHYSICS LETTERS 111, 202604, 2017; DOI: 10.1063/1.5002540
• Controlling spin relaxation with a cavity, Bienfait, A. et al., NATURE 531, 74, 2016; DOI: 10.1038/nature16944
• Coherent manipulation of Andreev states in superconducting atomic contacts, Janvier, C. et al., SCIENCE 349, 1199, 2015; DOI: 10.1126/science.aab2179
Any physical system being in theory able to reach the quantum regime, searching for the quantum properties of non-microscopic systems developed noticeably for the mechanical variables on nano-objects, and for the electrical variables of non-dissipative superconducting circuits.
The discovery in the mid-1990s that quantum mechanics provides resources for performing computational tasks beyond reach of classical computers triggered intense research of the basic units, namely the quantum bit circuits, needed for implementing a quantum computer. I will describe the most advanced superconducting quantum bits and the elementary quantum processors made with them. I will explain the scalability challenge for making a useful quantum computer, and the solutions envisioned for solving it. I will introduce the hybrid route based on microscopic spins coupled to quantum electrical circuits that we presently develop in our team.
References:
• Antibunched Photons Emitted by a dc-Biased Josephson Junction, Rolland, C. et al., PHYSICAL REVIEW LETTERS 122, 186804, 2019; DOI: 10.1103/PhysRevLett.122.186804
• Inductive-detection electron-spin resonance spectroscopy with 65 spins/root Hz sensitivity, Probst, S. et al., APPLIED PHYSICS LETTERS 111, 202604, 2017; DOI: 10.1063/1.5002540
• Controlling spin relaxation with a cavity, Bienfait, A. et al., NATURE 531, 74, 2016; DOI: 10.1038/nature16944
• Coherent manipulation of Andreev states in superconducting atomic contacts, Janvier, C. et al., SCIENCE 349, 1199, 2015; DOI: 10.1126/science.aab2179
Keywords
Quantum physics, electrical circuits, Quantum computer