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Resolved-Sideband Raman Cooling of a Bound Atom to the 3D Zero-Point Energy

1995; American Physical Society; Volume: 75; Issue: 22 Linguagem: Inglês

10.1103/physrevlett.75.4011

1092-0145

C. Monroe, D. M. Meekhof, B. E. King, Steven R. Jefferts, W. M. Itano, D. J. Wineland, Phillip L. Gould,

Quantum Mechanics and Applications

We report laser cooling of a single $^{9}\mathrm{Be}^{+}$ ion held in a rf (Paul) ion trap to where it occupies the quantum-mechanical ground state of motion. With the use of resolved-sideband stimulated Raman cooling, the zero point of motion is achieved 98% of the time in 1D and 92% of the time in 3D. Cooling to the zero-point energy appears to be a crucial prerequisite for future experiments such as the realization of simple quantum logic gates applicable to quantum computation.