Scientists Say Technique Can Enhance Quantum Technology Performance Tenfold

Insider Brief

• A Hebrew University-led team of researchers have developed a novel method that dramatically improves the stability and performance of quantum systems.
• The work addresses the longstanding challenges of decoherence and imperfect control.
• By exploiting the destructive interference of cross-correlated noise, the team significantly extended the coherence time of quantum states, improve control fidelity.

PRESS RELEASE — Researchers have made a significant advance in quantum technology by developing a novel method that dramatically improves the stability and performance of quantum systems. This pioneering work addresses the longstanding challenges of decoherence and imperfect control, paving the way for more reliable and sensitive quantum devices.

Quantum technologies, including quantum computers and sensors, hold immense potential for revolutionizing various fields such as computing, cryptography, and medical imaging. However, their development has been hampered by the detrimental effects of noise, which can disrupt quantum states and lead to errors.

Many traditional approaches to mitigating noise in quantum systems primarily focus on temporal autocorrelation, which examines how noise behaves over time. While effective to some extent, these methods fall short when other types of noise correlations are present.

The research was conducted by experts in quantum physics, PhD. student Alon Salhov under the guidance of Prof. Alex Retzker from Hebrew University, PhD. student Qingyun Cao under the guidance of Prof. Fedor Jelezko and Dr. Genko Genov from Ulm University and Prof. Jianming Cai from Huazhong University of Science and Technology. They have introduced an innovative strategy that leverages the cross-correlation between two noise sources. By exploiting the destructive interference of cross-correlated noise, the team has managed to significantly extend the coherence time of quantum states, improve control fidelity, and enhance sensitivity for high-frequency quantum sensing.

Key achievements of this new strategy include:

Tenfold Increase in Coherence Time: The duration for which quantum information remains intact is extended ten times longer compared to previous methods.

Improved Control Fidelity: Enhanced precision in manipulating quantum systems leads to more accurate and reliable operations.

Superior Sensitivity: The ability to detect high-frequency signals surpasses the current state-of-the-art, enabling new applications in quantum sensing.

Alon Salhov, said, “Our innovative approach extends our toolbox for protecting quantum systems from noise. By focusing on the interplay between multiple noise sources, we’ve unlocked unprecedented levels of performance, bringing us closer to the practical implementation of quantum technologies.”

This advancement not only marks a significant leap in the field of quantum research but also holds promise for a wide range of applications. Industries that rely on highly sensitive measurements, such as healthcare, stand to benefit enormously from these improvements.

The study titled “Protecting Quantum Information via Destructive Interference of Correlated Noise” is now available in Physical Review Letters and can be openly accessed at https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.223601