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Updated: Jun 4, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A multidimensional pseudospectral method for optimal control of quantum ensembles.

Justin Ruths¹, Jr-Shin Li

¹Department of Electrical and Systems Engineering, Washington University in St. Louis, St. Louis, Missouri 63130 USA.

The Journal of Chemical Physics

|February 2, 2011

Summary

This study introduces an optimal ensemble control method using a multidimensional pseudospectral approach to design control pulses for quantum systems with varying parameters, focusing on experimental viability.

Related Experiment Videos

Last Updated: Jun 4, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

Quantum Control
Spectroscopy
Computational Physics

Background:

Optimal control of quantum systems relies on effective pulse derivation.
Real-world quantum systems exhibit parameter variations, complicating control.
Previous work established the pseudospectral method for quantum pulse design.

Purpose of the Study:

To address the challenge of controlling quantum systems with parameter variations.
To develop an optimal ensemble control framework for such systems.
To demonstrate the efficacy of a multidimensional pseudospectral method for designing robust quantum control pulses.

Main Methods:

Formulated pulse design as an optimal ensemble control problem.
Applied a multidimensional pseudospectral method to solve the control problem.
Tested the method on challenging closed and open quantum systems in liquid nuclear magnetic resonance spectroscopy.

Main Results:

Successfully derived control pulses for ensembles of quantum systems with varying parameters.
Demonstrated the method's applicability to both closed and open quantum systems.
Showcased the ability to generate experimentally viable pulses with minimized energy or duration.

Conclusions:

The multidimensional pseudospectral method is effective for optimal ensemble quantum control.
This approach enables robust control of quantum systems despite parameter variations.
The derived pulses are practical for experimental implementation, offering energy and time efficiency.