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Preprints, Working Papers, ... Year : 2022

From Non-Markovian Dissipation to Spatiotemporal Control of Quantum Nanodevices

Abstract

Nanodevices exploiting quantum effects are critically important elements of future quantum technologies (QT), but their real-world performance is strongly limited by decoherence arising from local `environmental' interactions. Compounding this, as devices become more complex, i.e. contain multiple functional units, the `local' environments begin to overlap, creating the possibility of environmentally mediated decoherence phenomena on new time- and length-scales. Such complex and inherently non-Markovian dynamics could present a challenge for scaling up QT, but - on the other hand - the ability of environments to transfer `signals' and energy might also enable sophisticated spatiotemporal coordination of inter-component processes, as is suggested to happen in biological nanomachines, like enzymes and photosynthetic proteins. Exploiting numerically exact many body methods (tensor networks) we study a general, fully quantum model that allows us to explore how propagating environmental dynamics can instigate and direct the evolution of spatially remote, non-interacting quantum systems. We demonstrate how energy dissipated into the environment can be remotely harvested to create transient excited/reactive states, and also identify how reorganisation triggered by system excitation can qualitatively and reversibly alter the `downstream' kinetics of a functional site. With access to complete system-environment wave functions, we elucidate the microscopic processes underlying these phenomena, providing new insight into how they could be exploited for energy efficient quantum devices.

Dates and versions

hal-03866095 , version 1 (22-11-2022)

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Thibaut Lacroix, Brendon W. Lovett, Alex W. Chin. From Non-Markovian Dissipation to Spatiotemporal Control of Quantum Nanodevices. 2022. ⟨hal-03866095⟩
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