SAMOP 2023 – scientific programme

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QI: Fachverband Quanteninformation

QI 6: Poster I (joint session QI/Q)

QI 6.14: Poster

Monday, March 6, 2023, 16:30–19:00, Empore Lichthof

Quantum transport in noisy networks of coupled harmonic oscillators — •Emma King, Raphael Menu, and Giovanna Morigi — Theoretische Physik, Universitat des Saarlandes, D-66123 Saarbruecken, Germany

In recent years rapid progress has been made towards the realisation of scalable quantum computers. While devices with an increasing number of qubits are being realised, the present size does not yet allow for the efficient implementation of error-correction schemes. This highlights the importance of understanding the role of an environment on the target quantum coherent dynamics. In this work we address the question as to which properties of an external environment are detrimental, and, in contrast, which properties can be used as resources for quantum transport. For this purpose we consider two chains of coupled harmonic oscillators with long range interactions that decay in a power law fashion. The one chain acts as the system while the other is the environment. In this setting we derive a quantum master equation starting from the Liouville-von Neumann equation and identify the requirements on the environment for which the master equation has the Lindblad form. We then analyse transport in the chain as a function of the environment characteristics, identifying the regime(s) in which it leads to faster propagation of information along the chain.