Ultrafast gates for single atomic qubits.
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.
Campbell
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WC
Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742 USA. wes3000@umd.edu
Mizrahi
J
J
Quraishi
Q
Q
Senko
C
C
Hayes
D
D
Hucul
D
D
Matsukevich
D N
DN
Maunz
P
P
Monroe
C
C