New method achieves tenfold increase in quantum coherence time via destructive interference of correlated noise

Researchers have developed a new way to significantly boost the performance of quantum technology by exploiting the cross-correlation of two noise sources to extend coherence times, improve control fidelity, and increase the sensitivity of high-frequency sensing. This innovative strategy addresses a key challenge in quantum systems, increasing their stability by a factor of 10, paving the way for more reliable and versatile quantum devices.

This work Published In the journal Physics Review Letter.

The researchers: Quantum Technology We have developed a new method to dramatically improve the stability and performance of quantum systems. This pioneering work addresses the long-standing challenges of decoherence and imperfect control, paving the way to more reliable and sensitive quantum devices.

Quantum technologies, such as quantum computers and quantum sensors, have great potential to revolutionize many fields, including computing, encryption, and medical imaging. However, the development of quantum technologies has been hindered by the harmful effects of quantum computers. noiseThis can disrupt the quantum state and introduce errors.

Many previous approaches to mitigating noise in quantum systems focus primarily on temporal autocorrelation, which examines how the noise behaves over time. While these methods are effective to some extent, they fall short in the presence of other types of noise correlation.

The research was carried out by experts in quantum physics, including Alon Salkhov, a PhD student under the supervision of Professor Alex Retzker at the Hebrew University, Qingyun Cao, a PhD student under the supervision of Professor Fedor Jeretsko and Dr. Genko Genov at the University of Ulm, and Professor Jianming Cai at Huazhong University of Science and Technology. They introduced an innovative strategy that exploits the cross-correlation between two noise sources.

By exploiting the destructive interference of cross-correlated noise, the research team succeeded in significantly extending the coherence time of quantum states, improving the control fidelity and enhancing the sensitivity of high-frequency quantum sensing.

Key outcomes of this new strategy include:

• 10x increase in coherence time: Quantum Information Residuals remain intact for 10 times longer than with traditional methods.
• Increased control fidelity: The increased precision with which quantum systems can be operated allows for more accurate and reliable operation.
• Superior sensitivity: The ability to detect high frequency signals exceeds the current state of the art, enabling new applications in quantum sensing.

“Our innovative approach expands the conservation toolbox,” Salkhov said. Quantum Systems “By focusing on the interactions between multiple noise sources, we’ve achieved unprecedented levels of performance, bringing quantum technology closer to practical use.”

This advance not only represents a major leap in the field of quantum research, but also has the potential for a wide range of applications: industries that rely on extremely sensitive measurements, such as medicine, stand to benefit greatly from these improvements.