Dissipation-assisted quantum gates with cold trapped ions

Details Dissipation-assisted quantum gates with cold trapped ions Dissipation-assisted quantum gates with cold trapped ions

2002-05-13

arxiv.org/abs/quant-ph/0205070v2

Phys. Rev. A 67, 020301(R) (2003).

Physics

Quantum Physics

4 pages, 5 figures, substantially revised version

Scientific paper

10.1103/PhysRevA.67.020301

It is shown that a two-qubit phase gate and SWAP operation between ground states of cold trapped ions can be realised in one step by simultaneously applying two laser fields. Cooling during gate operations is possible without perturbing the computation and the scheme does not require a second ion species for sympathetic cooling. On the contrary, the cooling lasers even stabilise the desired time evolution of the system. This affords gate operation times of nearly the same order of magnitude as the inverse coupling constant of the ions to a common vibrational mode.

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