Title:Quantization of dynamics in quasi-periodically driven systems
Abstract: In the past decade, quantum simulators have increased in their power and scope, offering exquisite dynamical control of tens or even hundreds of individual atoms/ions. Concurrently, a topological revolution in our understanding of electronic band structures has taken place, driven by the discovery of topological insulators, graphene and other topological materials. Remarkably, these advances can be connected --- the dynamics of driven few level systems can be described using band structures in ``synthetic dimensions,'' one per driving tone. Topological order in the synthetic band structure then leads to quantized dynamical responses in the quantum simulator.
In this talk, I will use a unifying frequency lattice construction to reveal non-adiabatic topological responses in quasi-periodically driven systems. We will find that quasi-periodically driven qubits already exhibit topologically distinct dynamical phases, and that a 2-tone driven wire can function as a quantized energy pump at any temperature. The latter system provides one of the few examples of many-body localization protected order that is absolutely stable. I will argue that the quantized energy pumping regime is accessible in near-term optical and microwave cavity-QED experiments, and that furthermore, it is useful to prepare highly excited non-classical cavity states and entangled cavity-qubit states.
Bio: Anushya Chandran studies the organizing principles of quantum systems far from equilibrium. Her research sheds light on the process of thermalization, designs protocols to achieve non-trivial quantum dynamics, and informs near-term quantum device design. Anushya hails from India, where she studied at the Indian Institute of Technology in Madras. She received her PhD from Princeton University and performed post-doctoral research at Perimeter Institute before joining Boston University. She is the recipient of the Sloan fellowship and the NSF young investigator career award.
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2022-10-13T10:00:002022-10-13T11:00:00CM seminar: Dr. Anushya Chandran - Quantization of dynamics in quasi-periodically driven systemsEvent Information:
Dr. Anushya Chandran: Boston University
Title: Quantization of dynamics in quasi-periodically driven systems
Abstract: In the past decade, quantum simulators have increased in their power and scope, offering exquisite dynamical control of tens or even hundreds of individual atoms/ions. Concurrently, a topological revolution in our understanding of electronic band structures has taken place, driven by the discovery of topological insulators, graphene and other topological materials. Remarkably, these advances can be connected --- the dynamics of driven few level systems can be described using band structures in ``synthetic dimensions,'' one per driving tone. Topological order in the synthetic band structure then leads to quantized dynamical responses in the quantum simulator.
In this talk, I will use a unifying frequency lattice construction to reveal non-adiabatic topological responses in quasi-periodically driven systems. We will find that quasi-periodically driven qubits already exhibit topologically distinct dynamical phases, and that a 2-tone driven wire can function as a quantized energy pump at any temperature. The latter system provides one of the few examples of many-body localization protected order that is absolutely stable. I will argue that the quantized energy pumping regime is accessible in near-term optical and microwave cavity-QED experiments, and that furthermore, it is useful to prepare highly excited non-classical cavity states and entangled cavity-qubit states.
Bio: Anushya Chandran studies the organizing principles of quantum systems far from equilibrium. Her research sheds light on the process of thermalization, designs protocols to achieve non-trivial quantum dynamics, and informs near-term quantum device design. Anushya hails from India, where she studied at the Indian Institute of Technology in Madras. She received her PhD from Princeton University and performed post-doctoral research at Perimeter Institute before joining Boston University. She is the recipient of the Sloan fellowship and the NSF young investigator career award.
Event Location:
BRIM 311