Seminar "Quantum Information and Quantum Computing": C. Delerue (IEMN) & F. Cléri (IEMN)

The "Maison de la Simulation" and the "Quantum Information and Quantum Computing" working group invite you to a set of two seminars given by C. Delerue (IEMN) and F. Cléri (IEMN)

Zoom link: https://univ-lille-fr.zoom.us/j/95182035177?pwd=M2JFSTUrQjRlcWhRUEV4RjNVMzlpQT09

Program:  15:30-16:15: Christophe Delerue. Silicon Spin Qubits Summary : Silicon is the semiconductor material in which most of today's components and integrated circuits are manufactured by the microelectronics industry. It is therefore at the heart of the technologies that have revolutionized information processing and communications. Will it also be at the heart of future quantum computers and simulators? This presentation will focus on the design of silicon qubits in which the intrinsic magnetic moment (spin) of a single electron supports the quantum information. Preserving, manipulating and measuring the quantum spin state in these systems are challenges that many researchers are trying to address. In this talk, I will present some of the principles and avenues being pursued. #Presentation prepared with the help of Yann-Michel Niquet, CEA/IRIG, Grenoble. 16:30-17:15: Fabrizio Cleri. Supremacy vs Thermodynamics in Quantum Computing The so-called “supremacy” in quantum information technologies originates from the observation that quantum computers can perform certain tasks exponentially faster than any classical hardware. A quantum computer has access to exponentially more logical states, and thus, it has the potential to process exponentially more information per logical operation. However, we have known since the 1960s that information is physical and that its processing consumes thermodynamic resources. Stochastic thermodynamics has been able to incorporate information in the expression of fluctuation theorems, but can it be extended to "quantum thermodynamics"? Quantum computing is in principle reversible, but activating the gates of the quantum circuit is not energetically free. What does it mean irreversibility, work, heat in the quantum realm? Will quantum computers necessitate exponentially more energy to operate compared to a classical computer, to sustain any possible quantum advantage?