Geometric quantum drives: Hyperbolically driven quantum systems and beyond

Wen Wei Ho (NUS, Singapore)

May 22. 2025, 14:30 — 15:15

The high degree of controllability in modern day quantum simulators has enabled the engineering of Floquet topological Bloch bands and even the realization of novel non-equilibrium states like the discrete time crystal, through the implementation of time-dependent driving. Such drives, though, have so far been largely limited to time-periodic (i.e., Floquet) modulations, and their time-quasiperiodic (i.e., multi-tone) generalizations. This leads to a natural question: what are more general classes of  quantum drives, conceptually distinct from Floquet or time-quasiperiodic, which lead to interesting phase structure in dynamics? In this talk, I will present a general theoretical construction of quantum drives in which the position of a classical particle moving autonomously on a smooth connected manifold is used to steer a quantum Hamiltonian over time, thus leading to myriad time-dependent quantum Hamiltonians with properties dependent on the choice of underlying manifold and trajectory. Applying the construction we dub "geometric quantum driving" to a compact 2d hyperbolic Riemann surface, I will demonstrate a new class of drives called "hyperbolically driven quantum systems", and further show how in the adiabatic limit they are topologically classified by a quantized response that can be extracted through the dynamics of a simple local observable. We propose geometric quantum driving to be a general framework to chart the landscape of time-dependent quantum systems and investigate the universal phase structures they exhibit, as well as a useful tool to enhance the capabilities of modern day quantum simulators.

Further Information
Venue:
ESI Schrödinger and Boltzmann Lecture Hall
Recordings:
Recording
Associated Event:
Entanglement in Many-body Quantum Matter: Dynamics, Dissipation, Equilibration (Thematic Programme)
Organizer(s):
Mari Carmen Banuls (MPI of Quantum Optics, Garching)
Hannes Pichler (IQOQI, Innsbruck)
Norbert Schuch (U of Vienna)
Maksym Serbyn (ISTA, Klosterneuburg)