Group seminar at MPQ and Zoom: Stable Quantum-Correlated Many Body States via Engineered Dissipation

Alexios Michailidis, University of Geneva, Switzerland
Groupseminar at MPQ lecture hall and Zoom
Thursday, November, 23 at 9:00am (MEZ)

Abstract:
Engineered dissipation has been an essential tool for steering many-body quantum systems towards low temperature states. Techniques ranging from optical pumping to laser cooling have been instrumental in enabling experimentalists to drive quantum systems into novel phases of matter. Despite its general success, its application to quantum simulation was so far limited to the preparation of simple quantum states. In this talk, I will introduce a versatile framework for preparing and studying non-equilibrium steady states in synthetic quantum matter [1]. The framework consists of controlling the dissipation of qubits to their ground state, effectively allowing the exchange of energy (or other interesting information) between the system and its environment. I will present experimental results using superconducting qubits, to illustrate the effectiveness of the cooling protocol in 1D and 2D quantum systems, together with a theoretical analysis that gives quantitative predictions in certain limits [2]. Finally, I will show how dissipative preparation can be employed to experimentally study novel quantum transport phenomena, by exploring the “strong pumping” limit of an integrable spin chain.

[1] arXiv:2304.13878 (Science in press)
[2] In preparation