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SUMMARY:Quantum computing with neutral ytterbium atoms - Jeff Thompson\, D
 epartment of Electrical and Computer Engineering Princeton University
DTSTART:20230418T090000Z
DTEND:20230418T100000Z
UID:TALK199540@talks.cam.ac.uk
CONTACT:111806
DESCRIPTION:Quantum computing with neutral atoms has progressed rapidly in
  recent years\, combining large system sizes\, flexible and dynamic connec
 tivity\, and quickly improving gate fidelities. The pioneering work in thi
 s field has been implemented using alkali atoms\, primarily rubidium and c
 esium. However\, divalent\, alkaline-earth-like atoms such as ytterbium of
 fer significant technical advantages. In this talk\, I will present our pr
 ogress on quantum computing using 171-Yb atoms\, including high-fidelity i
 maging\, nuclear spin qubits with extremely long coherence times\, and two
 -qubit gates on nuclear spins using Rydberg states [1\,2]. I will also dis
 cuss several unexpected benefits of alkaline-earth-atoms: an extremely rob
 ust and power-efficient local gate addressing scheme [3]\, and a novel app
 roach to quantum error correction called “erasure conversion”\, which 
 has the potential to implement the surface code with a threshold exceeding
  4%\, using the unique level structure of 171-Yb to convert spontaneous em
 ission events into erasure errors [4]. Time permitting\, I will also prese
 nt some recent work towards telecom-band quantum networks with single Er3+
  ions in silicon nanophotonic circuits [5].\n\n\n\n[1] S. Saskin et al\, P
 hys. Rev. Lett. 122\, 143002 (2019).\n[2] A. P. Burgers et al\, PRX Quantu
 m 3\, 020326 (2022).\n[3] S. Ma\, A. P. Burgers\, et al\, Phys. Rev. X 12\
 , 021028 (2022).\n[4] Y. Wu\, et al\, Nat. Comms. 13\, 4657 (2022).\n[5] S
 . Ourari et al.\, 2301.03564 (2023)\n\n\n\n
LOCATION: Small Lecture Theatre\, Cavendish Laboratory\, J.J. Thomson Aven
 ue
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