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Updated: Aug 16, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

High-Fidelity Quantum Control by Polychromatic Pulse Trains.

Svetoslav S Ivanov¹, Boyan T Torosov², Nikolay V Vitanov¹

¹Department of Physics, St Kliment Ohridski University of Sofia, 5 James Bourchier Boulevard, 1164 Sofia, Bulgaria.

Physical Review Letters

|December 23, 2022

Summary

This summary is machine-generated.

This study presents a novel quantum control method using polychromatic pulse trains for high-fidelity qubit excitation. The technique offers robust or sensitive control profiles, enhancing quantum computing and sensing applications.

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Area of Science:

Quantum Information Science
Quantum Control Engineering
Superconducting Quantum Computing

Background:

Precise control of quantum systems is crucial for advancing quantum technologies.
Existing quantum control methods often face limitations in robustness or sensitivity.
Developing flexible and accurate control techniques is essential for scalable quantum computing and sensing.

Purpose of the Study:

To introduce and validate a novel quantum control technique utilizing polychromatic pulse trains.
To demonstrate the generation of diverse excitation profiles (broadband, narrowband, passband) with high fidelity.
To explore the application of this technique for robust quantum computing and sensitive quantum sensing.

Main Methods:

Derivation of polychromatic pulse trains with varying carrier frequencies (detunings).
Generation of target transition probabilities and excitation profiles.
Experimental validation on IBM's superconducting quantum processors.

Main Results:

Successful generation of high-fidelity excitation profiles, both robust and sensitive to experimental variations.
Demonstrated excellent agreement between theoretical predictions and experimental outcomes.
Showcased detuning as an effective control parameter comparable to pulse phase.

Conclusions:

The polychromatic pulse train technique offers a flexible and accurate approach to quantum control.
The method enhances robustness for quantum computing and sensitivity for quantum sensing.
This technique provides new avenues for quantum control, particularly where phase manipulation is challenging.