As quantum computing systems scale toward thousands—if not millions—of qubits, the role of the often overlooked quantum amplifier that listens to each qubit becomes increasingly critical. Researchers in Sweden have reported that the development of a smarter, ultra-low-power quantum amplifier could significantly alleviate one of quantum computing‘s major engineering challenges.
Researchers in Sweden say they’ve engineered a smarter, ultra-low-power quantum amplifier that could dramatically ease one of quantum computing’s biggest engineering headaches.
A new study from Chalmers University of Technology, in collaboration with Low Noise Factory AB, unveils a cryogenic amplifier that switches on only when needed. This reduces energy consumption and thermal noise that threaten the fragile state of quantum bits or qubits.
The breakthrough, detailed in IEEE Transactions on Microwave Theory and Techniques, has the potential to pave the way for the realization of truly large-scale, fault-tolerant quantum computers, marking a significant advancement in the field.
“This is the most sensitive amplifier that can be built today using transistors,” lead author and doctoral student at Chalmers, Yin Zeng, said in the Chalmers press release. “We’ve now managed to reduce its power consumption to just one-tenth of that required by today’s best amplifiers – without compromising performance. We hope and believe that this breakthrough will enable more accurate readout of qubits in the future.”
Hellbound and Down 