Ultraviolet Laser System for Quantum Many-Body Physics with Rydberg-Dressed Atoms
Abstract
Major Goals: A high-power, narrow-linewidth ultraviolet laser system will be employed to induce long-range interactions among laser-cooled atoms by the method of Rydberg dressing. Two broad areas of scientific inquiry will be enabled by the Rydberg dressing laser: the study of frustrated quantum magnets; and the investigation of many-body spin dynamics as a route to generating metrologically useful entanglement. We will generate the requisite magnetic interactions by using light of 320-nm wavelength to off-resonantly couple two ground hyperfine states of cesium to highly polarizable Rydberg states. The resulting pair of Rydberg-dressed ground states, which form the effective spin degree of freedom for simulations, will acquire tunable interactions extending over a range of several microns. The commercial laser system enabling the Rydberg dressing outputs 150 mW of single-mode 320-nm light, obtained via two stages of resonant frequency doubling seeded by the amplified output of a 1280-nm diode laser. By electro-optic modulation of the fundamental radiation, it will be possible to generate two output frequencies, separated by 9 GHz, for indepedent dressing of two distinct hyperfine states. This capability is crucial for varing the isotropy of the spin-spin couplings to implement not only Ising but also Heisenberg spin models of interest for the study of topologically ordered many-body states. Besides enabling fundamental research in many-body quantum physics, the long-range interactions obtained by Rydberg dressing can be harnessed to generate specific entangled states with applications in quantum metrology. Accomplishments: The high-power ultraviolet laser system purchased under the DURIP grant has enabled advances in control and coherence of long-range interactions among cold atoms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 08, 2018
- Accession Number
- AD1229270
Entities
People
- Monika Schleier-Smith
Organizations
- Stanford University