Adiabatic Echo Protocols for Robust Quantum Many-Body State Preparation

Area of Science:

• Quantum Information Science
• Condensed Matter Physics
• Quantum Computing

Background:

• Entangled many-body states are crucial for quantum technologies.
• Experimental imperfections hinder the preparation of these states using analog control.

Purpose of the Study:

• Introduce a general approach, the adiabatic echo protocol, for robust state preparation.
• Suppress the impact of static perturbations in quantum systems.

Main Methods:

• Analytical understanding of robustness via dynamically engineered destructive interference.
• Application of quantum optimal control methods.
• Demonstration across various quantum systems without assumptions on control fields.

Main Results:

• The adiabatic echo protocol naturally emerges in diverse settings.
• Successful Greenberger-Horne-Zeilinger state preparation in Ising spin chains and Rydberg atom arrays.
• Generation of quantum spin liquid states in frustrated Rydberg lattices.

Conclusions:

• The adiabatic echo protocol offers broad applicability for reliable many-body state preparation.
• Provides a practical framework for current quantum platforms.
• Enhances the feasibility of using entangled states in quantum technologies.