"Quantum devices as a meeting point for
thermodynamics and machine learning"

by Dr. Natalia Ares (University of Oxford, UK)
14 March 2023 (Tuesday), 12:00 – 13:00
Room 741, Blackett Building, Imperial College London
QOLS Seminar

Abstract

As we miniaturize devices to reach the quantum regime, the need arises to test the laws of thermodynamics in a new realm, in which fluctuations and quantum effects play a very important role. I will discuss how to explore the thermodynamics of semiconductor devices at nanometer scales, and I will explain how we measured the thermodynamic cost of recording the passage of time.
Electromechanical devices have great potential to build nanoscale motors. Fully suspended carbon nanotube devices allow us to control mechanical and electronic degrees of freedom with high accuracy. Using these devices we show that the transport of an electron can strongly couple to the nanotube motion. I will discuss how these experiments can be extended to study engines where the gas is one or two electrons and the piston is the movement of the nanotube.
These experiments and many others require increased levels of sophistication in quantum device control. The calibration and detailed characterization of these devices are tasks that become impossible as the number and complexity of the quantum devices we use grows. I will show that artificial intelligence algorithms are capable of characterizing and calibrating quantum devices fully automatically and even more efficiently than human experts.