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Laser-cooling atoms to indistinguishability: Atomic Hong-Ou-Mandel interference and entanglement through spin-exchange

Event Details

Event Dates: 

Thursday, May 7, 2015 - 10:00am

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Adam Kaufman

Speaker Affiliation(s): 

JILA (Regal group)
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Thesis Defense

Event Details & Abstract: 

In this thesis, I describe the development of and scientific results from a new platform for creating ultracold atoms via single-atom control.  We employ Raman-sideband cooling to isolated bosonic $^{87}$Rb atoms confined within sub-micron optical tweezers, yielding single particle three-dimensional ground-state fractions of 90%. We create multiple, independent, mobile optical tweezers, which simultaneously allows multi-particle studies with single-atom microscopy and highly tunable length-scales. We employ this toolset in both of the main experiments discussed in this thesis.  In one experiment, we observe Hong-Ou-Mandel interference of two bosonic atoms, each of which is independently prepared in spatially separated optical tweezers. The interference we observe is a direct consequence of the purity of the single particle quantum states produced, and the indistinguishability of the atoms. In a second experiment, we introduce a spin-degree of freedom and exploit spin-exchange dynamics, driven by the quantum-statistics of the particles, to create a spin-entangled pair of spatially separated atoms.