Ultrafast Gates for Single Atomic Qubits

作者：Wesley C. Campbell, Jonathan Mizrahi, Qudsia Quraishi, Crystal Senko, David Hayes, David Hucul, Dzmitry Matsukevich, Peter Maunz, Christopher R. Monroe · 发表于：Physical Review Letters · 年份：2010 · DOI：10.1103/physrevlett.105.090502 · 被引用次数：159 · 研究领域：Quantum Information and Cryptography、Quantum optics and atomic interactions、Laser-Matter Interactions and Applications

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.