Quantum Transport Enhancement by Time-Reversal Symmetry Breaking

Abstract

Quantum mechanics still provides new unexpected effects when considering the transport of energy and information. Models of continuous time quantum walks, which implicitly use time-reversal symmetric Hamiltonians, have been intensely used to investigate the effectiveness of transport. Here we show how breaking time-reversal symmetry of the unitary dynamics in this model can enable directional control, enhancement, and suppression of quantum transport. Examples ranging from exciton transport to complex networks are presented. This opens new prospects for more efficient methods to transport energy and information.

6+5 pages

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• Turnplate of quantum state
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• Continuous-Time Quantum Walks on Directed Bipartite Graphs
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• Topological classification of time-asymmetry in unitary quantum processes
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• Quantum walk processes in quantum devices
• Short time behavior of continuous time quantum walks on graphs
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• On the physical realizability of quantum stochastic walks
• How to Suppress Dark States in Quantum Networks and Bio-Engineered Structures
• Scalable Structure For Chiral Quantum Routing
• Quantum Simulation of a Discrete-Time Quantum Stochastic Walk
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• State Transfer in Complex Quantum Walks