Programmable Quantum Systems for Simulations, Computation and Networking
Realization of quantum systems that may be capable of outperforming the existing classical counterparts in executing useful tasks is a central challenge in quantum science and engineering. In this talk, I will describe two related examples of our recent work towards these goals. In the first example, I will describe the recent advances involving programmable, coherent manipulation of quantum many-body systems using atom arrays excited into Rydberg states. I will describe our recent technical upgrades that now allow the control over 200 atoms in two-dimensional arrays. Recent progress involving the exploration of exotic many-body phenomena, as well as realization and testing of quantum optimization algorithms using such systems, will be discussed. In the second example, I will report on our progress towards realization of quantum repeaters for long-distance quantum communication. Specifically, I will describe experimental realization of memory-enhanced quantum communication, which utilizes a solid-state spin memory integrated in a nanophotonic diamond resonator to implement asynchronous Bell-state measurements. This enables a four-fold increase in the secret key rate of measurement device independent quantum key distribution over the loss-equivalent direct-transmission method while operating at megahertz clock rates. Prospects for scaling up these techniques, including realization of larger quantum processors and quantum networks will be discussed.
About the Speaker
Mikhail Lukin received the Ph.D. degree from Texas A&M University in 1998. He has been a Professor of Physics at Harvard since 2004, where he is currently co-Director of the Harvard Quantum Initiative in Science and Engineering and co-Director of the Harvard-MIT Center for Ultracold Atoms. He has co-authored over 400 technical papers and has received a number of awards, including the Alfred P. Sloan Fellowship, David and Lucile Packard Fellowship for Science and Engineering, NSF Career Award, Adolph Lomb Medal of the Optical Society of America, AAAS Newcomb Cleveland Prize, APS I.I.Rabi Prize, Vannevar Bush Faculty Fellowship, Julius Springer Prize for Applied Physics, and the Willis E. Lamb Award for Laser Science and Quantum Optics. He is a fellow of the OSA, APS, and AAAS and a member of the National Academy of Sciences.
Mikhail Lukin's research is in the areas of quantum optics and quantum information science. His current interests include quantum manipulation of atomic and nanoscale solid-state systems, quantum metrology and its applications, quantum nonlinear optics and nanophotonics. He and his group are developing new techniques for controlling strongly interacting photons, ultracold atoms, and solid-state atom-like systems. These techniques are used to study fundamental physical phenomena associated with quantum dynamics of many-body systems and to facilitate implementation of novel applications in quantum information processing, quantum communication and quantum metrology. These include realization and studies of novel quantum states of matter away from equilibrium, realization of quantum computers and quantum networks, and development
of nanoscale quantum sensors with applications ranging from material science to biological imaging. In the course of this work they are also exploring the new scientific interfaces between quantum optics, atomic physics, condensed matter and information science.