Department of Physics Professor Kevin Singh was recently published in Nature Physics (2024) alongside his co-authors, for their article "A dual-species Rydberg Array".

"Measurements play a profound role in quantum mechanics. We usually think of measurements as an action that destroys and collapses quantum wavefunctions. However, by measuring subsets of a quantum system at a time, measurements can be used to correct errors in quantum processors or to engineer intricate patterns of quantum entanglement. 

In this work, my team and I used two different species of atoms (Rubidium and Cesium) to create a quantum processor that allows measurements to be performed on one element without disturbing the other, naturally separating the quantum system into a set of data and auxiliary qubits. Using strong inter-species Rydberg interactions between Rb and Cs, we showed that we can create maximally-entangled quantum states called Bell states between the data and auxiliary qubits. These entanglement operations, combined with the ability to perform measurements on only the auxiliary qubits, create a quantum processor well-suited for detecting and correcting errors when running quantum computations." (Professor Singh)

You can read more about the group's research in this article for Physics Org, or on the Nature Physics website.

Congratulations, Professor Singh!