2012/07/31 by K. W. Murch, U. Vool, D. Zhou +3 · 3 citations
Physics and Astronomy · #quant-ph #cond-mat.mes-hall #cond-mat.supr-con #physics.atom-ph #physics.optics
paper · pdf · doi:10.1103/physrevlett.109.183602
published as Phys. Rev. Lett. 109, 183602 (2012)
arxiv created 2012/11/23 · arxiv updated 2013/05/29
We demonstrate quantum bath engineering for a superconducting artificial atom coupled to a microwave cavity. By tailoring the spectrum of microwave photon shot noise in the cavity, we create a dissipative environment that autonomously relaxes the atom to an arbitrarily specified coherent superposition of the ground and excited states. In the presence of background thermal excitations, this mechanism increases the state purity and effectively cools the dressed atom state to a low temperature.