Quantum

Thermodynamics of Speed and Efficiency with Quantum Feedback

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 09/11/2026, 05:13:24 UTC.

Briefings

A new study derives a finite-time current-dissipation relation for open quantum dynamics with jump feedback, establishing quantum speed limits and power-efficiency trade-offs for stationary information engines. The research identifies how feedback influences state transformations and engine performance through informational entropy and direct dynamical contributions, offering a quantitative foundation for fast, low-dissipation quantum thermodynamics. This work exemplifies achieving the generalized Landauer bound in finite-time information erasure and approaching unit information efficiency at finite power in the large-system limit of a collective engine.

Key points

• The study derives a finite-time current-dissipation relation for continuously monitored open quantum dynamics with jump feedback.
• Quantum speed limits and power-efficiency trade-offs are established for stationary information engines through informational entropy and direct dynamical contributions.

Context

Quantum thermodynamics faces challenges in balancing speed and thermodynamic cost, particularly with feedback control. This research provides a fundamental relation for finite-time operations, enabling faster, more efficient quantum engines.

Limitations

The findings apply to continuously monitored open quantum dynamics with jump feedback. Results are based on theoretical derivation and do not include experimental validation or empirical data from specific systems.

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