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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Published on: August 2, 2019

Interaction-induced directed transport in quantum chaotic subsystems.

Sanku Paul¹, J Bharathi Kannan², M S Santhanam²

¹Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 USA.

Physical Review. E

|November 18, 2023

Summary

This summary is machine-generated.

Directed quantum transport emerges in interacting chaotic systems. Interactions break symmetries, enabling quantum currents within subsystems, controllable by interaction strength.

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Area of Science:

Quantum physics
Chaos theory
Condensed matter physics

Background:

Directed quantum transport typically requires noninteracting systems with broken symmetries.
Interacting quantum systems present challenges due to complex dynamics and emergent phenomena.
Classical chaos in quantum systems offers a unique platform for exploring novel transport mechanisms.

Purpose of the Study:

To investigate the possibility of directed quantum transport in interacting two-body chaotic systems.
To identify mechanisms for generating quantum directed currents in systems with intrinsic symmetry breaking.
To explore the role of interactions in controlling directed transport phenomena.

Main Methods:

Analysis of interacting two-body quantum systems with chaotic classical limits.
Theoretical framework demonstrating how subsystem interactions induce temporal symmetry breaking.
Explicit demonstration using the two-body interacting kicked rotor model.

Main Results:

One subsystem acts as a noise source, breaking temporal symmetry and enabling directed currents.
Quantum directed currents are realized in subsystems, even when prohibited by the composite system's symmetries.
Current magnitude shows multiple reversals with varying interaction strength, allowing for control.

Conclusions:

A minimal framework for directed transport in interacting chaotic systems involves broken spatial symmetry and interactions.
Interaction-induced directed currents are of quantum origin, not semiclassical.
The proposed mechanism is applicable to a broader range of interacting quantum systems.