Ultrafast Gates for Single Atomic Qubits

Details Ultrafast Gates for Single Atomic Qubits Ultrafast Gates for Single Atomic Qubits

2010-05-22

arxiv.org/abs/1005.4144v1

Phys. Rev. Lett. 105, 090502 (2010)

Physics

Atomic Physics

10 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.105.090502

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 pi 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 (Rabi frequency / trap frequency > 10000), demonstrating that this interaction takes place deep within the strong excitation regime.

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