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 Thursday, 13 June 2024

    Video-Recording for any system with MP4-support

   - Video.mp4  (ca. 415 Mb)

 15:15 – 16:18


                                     "Listening to Quantum Sound"


                                                 Prof. John Teufel




Quantum mechanics is traditionally considered when measuring at the extreme

microscopic scale, i.e. single photons, electrons or atoms.  However, even the

early pioneers of the quantum theory postulated gedanken experiments in which

quantum effects would manifest on an everyday scale. I will present recent

experiments in which we engineer and measure microelectromechanical (MEMs)

circuits to observe and to exploit quantum behavior at an increasingly

macroscopic scale.  By embedding mechanical resonators in superconducting

microwave circuits, we achieve strong radiation-pressure coupling between fields

and motion that allows us to perform quantum experiments of massive objects.

 I review our experimental progress in cooling, squeezing and entangling motion,

as well as ongoing efforts toward arbitrary quantum control of mechanical systems.

The ability to prepare and to “listen” to quantum sound has implications for

fundamental science as well as many powerful applications including the processing,

storage and networking of quantum information.


About the Speaker:


Dr. John D. Teufel is an experimental physicist in the Applied Physics Division of

NIST Boulder. He received his PhD in physics from Yale University on a fellowship

from NASA studying superconducting photon detectors. Now as a project leader

in the Advanced Microwave Photonics group at NIST, he uses the tools of

nanofabrication and precision microwave measurements at cryogenic temperatures

to explore the quantum behavior of macroscopic systems. This includes development

and metrology of superconducting qubits, optomechanical circuits and Josephson

parametric technology.


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