Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities



: Zhao-Di Liu, Henri Lyyra, Yong-Nan Sun, Bi-Heng Liu, Chuan-Feng Li, Guang-Can Guo, Sabrina Maniscalco, Jyrki Piilo

Publisher: NATURE PUBLISHING GROUP

: 2018

: Nature Communications

: NATURE COMMUNICATIONS

: NAT COMMUN

: ARTN 3453

: 9

: 7

: 2041-1723

DOI: https://doi.org/10.1038/s41467-018-05817-x

: https://research.utu.fi/converis/portal/detail/Publication/35817308


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, 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 nonpositive dynamical map. Our platform opens the possibility to simulate dephasing of any physical system and study fundamental questions on open quantum systems.

Last updated on 2024-26-11 at 23:09