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Curated by: Qiskit (180 videos)
Quantum Many-Body Jarzynski Equality and Dissipative Noise on a Digital Quantum Computer Your formal invite to weekly Qiskit videos ► https://ibm.biz/q-subscribe Speaker: Dominik Hahn Host: Zlatko Minev, PhD. Abstract: The quantum Jarzynski equality and the Crooks relation are fundamental laws connecting equilibrium processes with nonequilibrium fluctuations. They are promising tools to benchmark quantum devices and to measure free energy differences. While they are well established theoretically and also experimental realizations for few-body systems already exist, their experimental verification in the quantum many-body regime has remained an outstanding challenge. Here, I present results for nonequilibrium protocols in systems with up to sixteen interacting degrees of freedom obtained on trapped ion and superconducting qubit quantum computers, which verify the quantum Jarzynski equality and the Crooks relation in the many-body regime. To achieve this, we overcome present-day limitations in the preparation of thermal ensembles and in the measurement of work distributions on noisy intermediate-scale quantum devices. I discuss the accuracy to which the Jarzynski equality holds on different quantum computing platforms subject to platform-specific errors. The analysis reveals a novel dissipative nonequilibrium regime, where a fast unitary drive compensates for dissipation and restores the validity of Jarzynski's equality. These insights provide a new way approach to analyze errors in many-body quantum simulators. Bio: "I did my undergraduate in the University of Regensburg and I am third year PHD student at the Max Planck Institute for the physics of complex systems in Dresden, Germany. I work broadly on the field of quantum dynamics and thermalization, i.e the eigenstate thermalization hypothesis and cases where it breaks down (many-body localization, quantum scars etc.), Floquet prethermalization and the practical simulation of non-equilibrium dynamics on quantum computers." -- The Qiskit Seminar Series is a deep dive into various academic and research topics within the quantum community. It will feature community members and leaders every Friday, 12 PM EDT.