• 18 Jun, 2024

Non-reciprocal quantum batteries exhibit excellent capacity and performance

Non-reciprocal quantum batteries exhibit excellent capacity and performance

New research has opened a new way to increase the energy storage capacity and efficiency of quantum batteries.

Researchers have discovered a remarkable way to boost the performance of quantum batteries using the concept of nonreciprocity. In physics, nonreciprocity refers to systems whose behavior differs depending on the direction of signal propagation, breaking a fundamental symmetry known as time-reversal symmetry.

While nonreciprocity has been leveraged in developing quantum technologies like directional signal flow and noise suppression, it had rarely been explored for enhancing quantum energy storage solutions – until now.

A team of scientists from the University of Gdansk in Poland and the University of Calgary in Canada have introduced groundbreaking nonreciprocal quantum batteries that exhibit exceptional energy capacity and efficiency. Their findings, published in Physical Review Letters, demonstrate the potential of using nonreciprocity to optimize the charging dynamics of quantum batteries.

By exploiting the breaking of time-reversal symmetry, the researchers designed quantum batteries that facilitate a one-way flow of energy from a quantum charger to the battery, preventing energy backflow. This is achieved through a process called reservoir engineering, where a dissipative environment, such as an auxiliary waveguide, enables effective energy transfer.

The nonreciprocal setup enhances energy accumulation by balancing dissipative interactions with coherent ones, resulting in a significant increase in stored energy, even in regimes with high energy dissipation. Remarkably, the researchers found that their nonreciprocal design led to a fourfold enhancement in energy storage efficiency compared to conventional quantum batteries.

"Our findings demonstrate that nonreciprocal quantum batteries can effectively overcome local dissipation and maintain high energy transfer rates," said Assistant Professor Shabir Barzanjeh, co-author of the study. "The practical implications are extensive, potentially revolutionizing energy storage in quantum technologies, enabling more efficient quantum sensing, energy capture, and even advancing the study of quantum thermodynamics."

The researchers plan to further explore the interplay between nonreciprocity and other quantum resources, such as entanglement and quantum catalysis, to boost energy storage capabilities even further. Additionally, they aim to experimentally implement their theoretical models in practical quantum circuits, validating their findings and refining the technology for real-world applications.

This groundbreaking research opens up exciting new avenues for using nonreciprocity to enhance the performance and reliability of quantum batteries and other quantum systems, paving the way for more efficient and powerful quantum technologies.