Deterministic Loading of Microwaves Onto an Artificial Atom Using a Time-Reversed Waveform

Overview

Journal Nano Lett

Publisher American Chemical Society

Specialty Biotechnology

Date 2022 Oct 6

PMID 36200986

Authors

Wei-Ju Lin

Yong Lu

Ping Yi Wen

Yu-Ting Cheng

Ching-Ping Lee

Kuan Ting Lin

Kuan Hsun Chiang

Ming Che Hsieh

Ching-Yeh Chen

Chin-Hsun Chien

Jia Jhan Lin

Jeng-Chung Chen

Yen Hsiang Lin

Chih-Sung Chuu

Franco Nori

Anton Frisk Kockum

Guin Dar Lin

Per Delsing

Io-Chun Hoi

Affiliations

Soon will be listed here.

Abstract

Loading quantum information deterministically onto a quantum node is an important step toward a quantum network. Here, we demonstrate that coherent-state microwave photons with an optimal temporal waveform can be efficiently loaded onto a single superconducting artificial atom in a semi-infinite one-dimensional (1D) transmission-line waveguide. Using a weak coherent state (the number of photons () contained in the pulse ≪1) with an exponentially rising waveform, whose time constant matches the decoherence time of the artificial atom, we demonstrate a loading efficiency of 94.2% ± 0.7% from 1D semifree space to the artificial atom. The high loading efficiency is due to time-reversal symmetry: the overlap between the incoming wave and the time-reversed emitted wave is up to 97.1% ± 0.4%. Our results open up promising applications in realizing quantum networks based on waveguide quantum electrodynamics.

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