Deterministic Loading of Microwaves onto an Artificial Atom Using a Time-Reversed Waveform.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36200986.
- Also identified by DOI 10.1021/acs.nanolett.2c02578 and PMC identifier 9615994.
- Licence recorded as CC BY-NC-ND.
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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 (<i>N</i>) 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.