Shortcuts to Thermodynamic Quasistaticity

Area of Science:

• Quantum Control
• Thermodynamics
• Many-Body Systems

Background:

• Near-term quantum technologies need robust control strategies for complex many-body systems.
• Shortcuts to adiabaticity are effective but often system-specific.
• There is a need for approximate, broadly applicable control strategies.

Purpose of the Study:

• To develop a new, broadly applicable control strategy inspired by thermodynamics.
• To focus on system macrostates rather than microstates for robust quantum control.
• To systematically improve existing shortcuts to adiabaticity.

Main Methods:

• Inspired by thermodynamics, focusing on preserving the equation of state (macrostates).
• Utilized adiabatic perturbation theory to derive systematic corrections.
• Improved fast quasi-adiabatic driving and applied to the quantum Ising chain.

Main Results:

• Developed a novel approach to quantum system control based on macrostate preservation.
• Demonstrated improved performance over existing fast quasi-adiabatic driving.
• Successfully applied the method to the quantum Ising chain in a transverse field.

Conclusions:

• The proposed thermodynamic approach offers a robust and broadly applicable strategy for controlling complex quantum systems.
• This method provides a systematic way to improve existing shortcuts to adiabaticity.
• The findings are relevant for the development of near-term quantum technologies.