Event Details

Many quantum sensors transduce an environmental signal to the energy difference between two quantum states. The gold standard technique for detecting this energy difference is a Ramsey experiment, where the sensor is prepared in an equal quantum superposition of the two states and allowed to evolve freely, picking up a complex phase signal that depends on the energy difference. However, environmental noise causes random evolution of the quantum state, degrading signal to noise ratio. Often, this noise can be modeled very simply, and so we can use our knowledge of the noise to mitigate its impacts. I will discuss the challenges of quantum sensing and present our results showing how completely deterministic control of a quantum system can give almost a factor of 2 boost in signal to noise ratio compared to a Ramsey experiment. I will discuss limitations and extensions of our technique, including how it can be used for time-varying signals and on distributed entangled sensors.

Join Zoom Webinar

https://usc.zoom.us/j/97981256792?pwd=ajTdLLR1iDuU8BrbBaG7BEJqOwQVj5.1

Meeting ID# 979 8125 6792

Passcode # 324264

Host: Ajey Jacob and Steve Crago
POC: Peter Zamar

Speaker Bio

Eli Levenson-Falk is an Associate Professor in the Department of Physics & Astronomy and the Ming Hsieh Department of Electrical & Computer Engineering at the University of Southern California. He runs LFL, an experimental research group that focuses on using superconducting electrical circuits for quantum information applications. He received his PhD from the University of California Berkeley in 2013 and conducted postdoctoral studies at Stanford University.