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Ultrafast gates for single atomic qubits.

  • Author(s): Campbell, WC
  • Mizrahi, J
  • Quraishi, Q
  • Senko, C
  • Hayes, D
  • Hucul, D
  • Matsukevich, DN
  • Maunz, P
  • Monroe, C
  • et al.
Abstract

We demonstrate single-qubit operations on a trapped atom hyperfine qubit using a single ultrafast pulse from a mode-locked laser. We shape the pulse from the laser and perform a π rotation of the qubit in less than 50 ps with a population transfer exceeding 99% and negligible effects from spontaneous emission or ac Stark shifts. The gate time is significantly shorter than the period of atomic motion in the trap (Ω(Rabi)/ν(trap)>10(4)), demonstrating that this interaction takes place deep within the strong excitation regime.

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