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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Fast Quantum Control of Cavities Using an Improved Protocol without Coherent Errors.

Jonas Landgraf^1,2,3, Christa Flühmann^4,5, Thomas Fösel^1,3

¹Max Planck Institute for the Science of Light, Staudtstraße 2, 91058 Erlangen, Germany.

Physical Review Letters

|January 29, 2025

Summary

This summary is machine-generated.

Selective number-dependent arbitrary phase gates achieve high performance by suppressing coherent errors with optimized pulse times. This quantum gate approach enhances fidelity and is compatible with fault-tolerant quantum computing.

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Area of Science:

Quantum Information Science
Quantum Optics
Quantum Computing

Background:

Selective number-dependent arbitrary phase gates impart chosen phases to cavity Fock states.
Coherent errors currently limit the performance of these quantum gates, particularly with short pulses.

Purpose of the Study:

To theoretically and experimentally demonstrate the suppression of coherent errors in arbitrary phase gates.
To achieve shorter gate times and reduce incoherent errors through optimized pulse durations.

Main Methods:

Utilizing a theoretical framework to identify optimal pulse times for error suppression.
Conducting experiments to validate the theoretical predictions on arbitrary phase gate performance.
Employing a small number of frequency components for pulse generation and interpretation.

Main Results:

Coherent errors in arbitrary phase gates can be completely suppressed when pulse times exceed a specific limit.
Optimized pulse durations lead to shorter gate times, consequently reducing incoherent errors.
The developed pulse scheme is easily interpretable and compatible with fault-tolerant quantum computing.

Conclusions:

The study presents a method to overcome performance limitations in arbitrary phase gates caused by coherent errors.
Optimized pulse timing offers a pathway to enhance the fidelity and efficiency of quantum gates.
This approach is practical, requiring minimal frequency components and aligning with fault-tolerant quantum computation strategies.