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Related Experiment Video

Updated: Jun 14, 2026

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

Published on: May 8, 2021

Arbitrarily accurate dynamical control in open quantum systems.

Kaveh Khodjasteh¹, Daniel A Lidar, Lorenza Viola

¹Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, New Hampshire 03755, USA.

Physical Review Letters

|April 7, 2010

Summary

This summary is machine-generated.

Dynamical control techniques can synthesize quantum gates in open systems, perturbatively compensating for decoherence. This method enhances quantum gate fidelities by using concatenated dynamically corrected gates, independent of system details.

Related Experiment Videos

Last Updated: Jun 14, 2026

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

Published on: May 8, 2021

Area of Science:

Quantum Information Science
Quantum Control Theory
Open Quantum Systems

Background:

Decoherence poses a significant challenge for building robust quantum computers.
Controlling quantum systems precisely is essential for reliable quantum computation.

Purpose of the Study:

To develop a method for synthesizing unitary transformations in open quantum systems.
To achieve perturbative compensation of decoherence to enhance gate fidelities.

Main Methods:

Utilizing open-loop dynamical control techniques.
Employing concatenated dynamically corrected gates.
Developing a fully analytical solution.

Main Results:

Demonstrated that decoherence can be compensated to arbitrary accuracy.
The accuracy depends on error strength and control modulation rate.
The method is independent of detailed system-environment interaction knowledge.

Conclusions:

Proposed a viable strategy for improving quantum gate fidelities in realistic scenarios.
The technique offers a path towards more robust quantum information processing.
Highlights the potential of dynamical control in mitigating quantum decoherence.