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Applied Physics/Physics Colloquium presents "Quantum Science with Tweezer Arrays"

Topic: 
Quantum Science with Tweezer Arrays
Tuesday, February 11, 2020 - 4:30pm
Venue: 
Hewlett 200
Speaker: 
Manuel Endres (Caltech)
Abstract / Description: 

Recently cold atoms in optical tweezer arrays have emerged as a versatile platform for quantum science experiments. I will review some of these developments, specifically, atom-by-atom assembly [1] as a fast and simple method to generate defect-free atomic arrays and Rydberg-based quantum simulation of spin models. While already reaching competitive results, these systems are still in their infancy and limitations in coherence, detection fidelity, and scalability remain. I will outline how we can improve on these issues and open new avenues in quantum metrology by using alkaline earth atoms, followed by an overview of recent results: 1) A record in imaging-fidelity for neutral atoms and demonstration of narrow-line cooling in tweezers [2,3]. 2) High-fidelity Rydberg excitation from a clock state, including a record in entanglement-fidelity for two neutral atoms [4]. 3) Demonstration of an optical clock with single-atom detection in tweezer arrays [5].

 

[1] Endres et al., Science 354, 1024 (2016)

[2] Covey et. al, Phys. Rev. Lett. 122, 173201 (2019)

[3] Cooper et al., Phys. Rev. X 8, 041055 (2018)

[4] Madjarov*, Covey*, et al., arXiv:2001.04455 (2020)

[5] Madjarov et al., Phys. Rev. X 9, 041052 (2019)


Winter Qtr. Colloq. committee: M. Schleier-Smith (Chair), B. Cabrera, S. Dimopoulos, T. Heinz, S. Kachru & L. Tompkins
Location: Hewlett Teaching Center, Rm. 200