Thermodynamic Advantage of Quantum Time-Reversal

TL;DR

This paper demonstrates that quantum memories can significantly reduce energy dissipation compared to classical memories by exploiting a continuum of time-reversal symmetries, thus offering a thermodynamic advantage.

Contribution

It introduces the concept that quantum memory's continuum of time-reversal symmetries enables minimized irreversibility and energy dissipation, surpassing classical memory capabilities.

Findings

Quantum memory reduces energy dissipation by orders of magnitude.

Quantum time-reversal symmetry continuum allows for optimized memory design.

Classical memories have discrete time-reversal symmetries, limiting efficiency.

Abstract

Classical computations inherently require energy dissipation that increases significantly as the reliability of the computation improves. This dissipation arises when transitions between memory states are not balanced by their time-reversed counterparts. While classical memories exhibit a discrete set of possible time-reversal symmetries, quantum memory offers a continuum. This continuum enables the design of quantum memories that minimize irreversibility. As a result, quantum memory reduces energy dissipation several orders of magnitude below classical memory.