Many-Body Cavity QED
What is a quantum neural network and how might it exhibit computational advantage? Can we create a spin glass made of atomic spins and photons and use it to resolve longstanding mysteries surrounding spin-glass order? Could BEC matter waves interacting via photons mimic the quantum liquid crystals found in high-Tc superconductors? If so, what might we learn? We are tackling these fundamental and technologically relevant questions using our novel multimode cavity QED-BEC apparatus. The system provides strong, photon-mediated interactions among atoms trapped within the cavity resonator. Photons virtually scattered among the atoms cause the system to superradiate and self-organize into various exotic forms of quantum matter such as quantum spin glasses---which can be used as quantum neural networks---and quantum liquid crystals. We have recently demonstrated the necessary ingredients needed to realize these exotic systems. Moreover, we are investigating whether quantum neural networks based on these driven-dissipative quantum systems may provide for finding solutions to NP-hard optimization problems.
We made a spinor polariton condensate. Published in PRL. Read more... Read More
A new nonequilibrium state of matter. To appear in Phys Rev Applied. ArXiv version
Congratulations Alicia Kollár, PhD!
Digital Micromirror Devices (DMD) provide a robust platform with which to implement digital holography, in principle providing the means to... Read More
V. D. Vaidya, Y. Guo, R. M. Kroeze, K. E. Ballantine, A. J. Kollár, J. Keeling, and B. L. Lev
Tunable-range, photon-mediated atomic interactions in multimode cavity QED
Physical Review X 8, 011002 (2018). pdf
Selected for a Viewpoint in APS Physics:
H. Türeci, A Multimode Dial for Interatomic Interactions, pdf
S. Gopalakrishnan, B. L. Lev, and P. Goldbart
Exploring models of associative memory via cavity quantum electrodynamics
Philosophical Magazine, 92, 353 (2012).
Special issue in honor of David Sherrington