Bulletin of the American Physical Society
50th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics APS Meeting
Volume 64, Number 4
Monday–Friday, May 27–31, 2019; Milwaukee, Wisconsin
Session V08: Quantum Optics and Simulations with Rydberg Atoms |
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Sponsoring Units: DQI Chair: John Bollinger, NIST Room: Wisconsin Center 103C |
Friday, May 31, 2019 8:00AM - 8:30AM |
V08.00001: Novel quantum devices based on atomic vapor cells Invited Speaker: Tilman Pfau Photonic quantum devices based on atomic vapors at room temperature combine the advantages of atomic vapors being intrinsically reproducible and highly nonlinear with scalability and integrability. We show the integration of photonic and electronic components into vapour cells. In the future integrated optical and electronic circuits in atomic vapor cells will enable applications in quantum sensing and quantum networks. As an example we report a first demonstration of an on-demand single-photon source based on four-wave mixing (FWM) and the Rydberg blockade effect. We also investigate an integrated optical chip immersed in atomic vapour providing several waveguide ge- ometries for spectroscopy applications. This includes integrated ring resonators, Mach Zehnder interferometers, slot waveguides and counter propagating coupling schemes. This work demonstrates a next step towards minia- turization and integration of alkali atom spectroscopy and provides a platform for further fundamental studies of strong atom light coupling. [1] Ripka, F., K\"{u}bler, H., L\"{o}w, R., Pfau, T.: Science. 362, 446 (2018). [Preview Abstract] |
Friday, May 31, 2019 8:30AM - 9:00AM |
V08.00002: Strong interactions between photons in a Rydberg medium Invited Speaker: Wenchao Xu Recent years have seen a remarkable development in our ability to manipulate individual photons and make them interact. I will present an unusual optical medium that is nonlinear at the individual-photon scale: In this medium, photons travel slowly, acquire mass, and exhibit strong mutual attraction, so strong that two photons can even form a bound state, or repel each other. The optical medium is an ultracold trapped atomic gas where photons travel under the conditions of electromagnetically induced transparency (EIT) that involves a highly excited Rydberg state. The strong interactions between two Rydberg atoms are then mapped onto the photons that travel through the medium as slow-light polaritons. Attractive interactions can be created in the standard EIT scheme, while repulsive interactions between photons are implemented in a double-EIT scheme. [Preview Abstract] |
Friday, May 31, 2019 9:00AM - 9:30AM |
V08.00003: Many-body dynamics and entanglement in Rydberg atom arrays Invited Speaker: Ahmed Omran Programmable arrays of neutral atoms provide an exciting avenue for quantum simulations and quantum information processing. We employ a 1D array of neutral atoms coupled to Rydberg states to simulate a transverse-field Ising model with long-range interactions. This system can undergo quantum phase transitions breaking different spatial symmetries, which we study in detail. I will present our studies of non-equilibrium dynamics across these phase transitions, which yields universal scaling laws consistent with the quantum Kibble-Zurek mechanism. Furthermore, I will describe a method we developed to rapidly and deterministically entangle a full chain of atoms using local engineering of the many-body spectrum and adiabatic transitions. The ability to reliably produce large-scale entanglement in neutral atom systems opens up a new route towards scalable quantum processors. [Preview Abstract] |
Friday, May 31, 2019 9:30AM - 10:00AM |
V08.00004: Nondestructive Rydberg-interaction-mediated cooling of neutral atoms Invited Speaker: Alexey Gorshkov We propose a protocol for sympathetically cooling neutral atoms without destroying the quantum information stored in their internal states. This is achieved by designing state-insensitive Rydberg interactions between the data-carrying atoms and cold auxiliary atoms. The resulting interactions give rise to an effective phonon coupling, which leads to the transfer of heat from the data atoms to the auxiliary atoms, where the latter can be cooled by conventional methods. This can be used to extend the lifetime of neutral-atom-based quantum storage and can have applications for long quantum computations. The protocol can also be modified to realize state-insensitive interactions between the data and the auxiliary atoms, but tunable and non-trivial interactions among the data atoms, allowing to simultaneously cool the data atoms and simulate a quantum spin-model. [Preview Abstract] |
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