Quantum Sensors: Data at the Information Frontier of Physics

10:00 AM - 11:00 AM
Raphael Pooser, Computational Sciences & Engineering Division
CSED Data Science Seminar Series
Joint Institute for Computational Sciences (Building 5100), Auditorium (Room 128)
Email: Raju Vatsavai


Quantum information processing has a host of applications, including quantum key distribution and quantum computing as some of the most prominent. In all of these applications, sensing and control are needed in order to maintain the fidelity of quantum information. In quantum sensors, information stored in quantum mechanical systems is extracted and put to use, either in subsequent control signals, or in general information processing applications. Some famous examples of quantum sensors include atomic clocks, cold atom interferometers, or Bose-Einstein condensates used in gravimeters, accelerometers, etc. Some of the original proposals for quantum sensors involved optical fields. In particular, sensors that exploit continuously variable degrees of freedom have been of interest since the discovery of quantum noise reduction. One of the first examples proposed by Caves is the use quantum noise reduction to achieve interferometric sensitivity in the quantum regime. Advanced LIGO is an example of an upcoming application. In addition to LIGO, in recent years continuous variables have seen renewed interest. In this talk we will discuss quantum sensors and their applications with a focus on the sensors developed at ORNL. We use quantum noise reduction to produce sub-shot-noise limited sensing devices, particularly in quantum plasmonic sensors and displacement sensors using MEMS cantilevers. Some applications for these devices include trace detection or quantum information applications, such as removing bias from QRNGs through adaptive control. We will also discuss other sensing types that use discrete variables, such as single photon detection applications.

About the Speaker

Raphael Pooser is a research scientist in the Cyberspace Sciences and Information Intelligence Research (CSIIR) Group, currently serving as a Wigner Fellow at the Quantum Science and Technology Center since September, 2009. Pooser¹s research interests focus on nonlinear optics in atomic vapors in order to produce quantum-entangled beams of light. The entangled light source has a number of applications, including quantum imaging, quantum communication, quantum memory, and low-noise amplification of quantum states, in addition to the potential applicability to quantum computing. Other ongoing projects include quantum key distribution with discrete photons as well as continuous variables and efficient ultrafast detection of entangled photons. Pooser holds a Bachelor's of Science degree in physics from New York University and a PhD in Engineering Physics from University of Virginia. Prior to coming to ORNL, he trained as an Intelligence Community postdoctoral fellow in the Laser Cooling and Trapping Group at the National Institute of Standards and Technology. He is also currently a member of the Optical Society of America and the American Physical Society.


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