Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities
Abstract
Engineering, controlling, and simulating quantum dynamics is a strenuous task. However, these techniques are crucial to develop quantum technologies, preserve quantum properties, and engineer decoherence. Earlier results have demonstrated reservoir engineering, construction of a quantum simulator for Markovian open systems, and controlled transition from Markovian to non-Markovian regime. Dephasing is an ubiquitous mechanism to degrade the performance of quantum computers. However, a fully controllable all-purpose quantum simulator for generic dephasing is still missing. Here we demonstrate full experimental control of dephasing allowing us to implement arbitrary decoherence dynamics of a qubit. As examples, we use a photon to simulate the dynamics of a qubit coupled to an Ising chain in a transverse field and also demonstrate a simulation of non-positive dynamical map. Our platform opens the possibility to simulate dephasing of any physical system and study fundamental questions on open quantum systems.
Cite
@article{arxiv.1712.08071,
title = {Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities},
author = {Zhao-Di Liu and Henri Lyyra and Yong-Nan Sun and Bi-Heng Liu and Chuan-Feng Li and Guang-Can Guo and Sabrina Maniscalco and Jyrki Piilo},
journal= {arXiv preprint arXiv:1712.08071},
year = {2018}
}
Comments
V2: Added some text and new figure