Work

Quantum simulation of quantum channels in nuclear magnetic resonance

Year: 2017

Type: article

Abstract: We propose and experimentally demonstrate an efficient framework for the quantum simulation of quantum channels in nuclear magnetic resonance (NMR). Our approach relies on the suitable decomposition of nonunitary operators in a linear combination of $d$ unitary ones, which can be then experimentally implemented with the assistance of a number of ancillary qubits that grows logarithmically in $d$. As a proof-of-principle demonstration, we realize the quantum simulation of three quantum channels for a single-qubit: phase damping, amplitude damping, and depolarizing channels. For these paradigmatic cases, we measure key features, such as the fidelity of the initial state and the associated von Neumann entropy for a qubit evolving through these channels. Our experiments are carried out using nuclear spins in a liquid sample and NMR control techniques.

Source: Physical Review A

DOI: 10.1103/physreva.96.062303

Authors: Tao Xin, Shi-Jie Wei, Julen S. Pedernales, Enrique Solano, Gui-Lu Long