Deterministic loading and phase shaping of microwaves onto a single artificial atom
arXiv:2012.15084 · doi:10.1021/acs.nanolett.2c02578
Abstract
Loading quantum information deterministically onto a quantum node is an important step towards 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 (average photon number N<<1 with an exponentially rising waveform, whose time constant matches the decoherence time of the artificial atom, we demonstrate a loading efficiency of above 94% from 1D semi-free space to the artificial atom. We also show that Fock-state microwave photons can be deterministically loaded with an efficiency of 98.5%. We further manipulate the phase of the coherent state exciting the atom, enabling coherent control of the loading process. Our results open up promising applications in realizing quantum networks based on waveguide quantum electrodynamics (QED).
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- Microwave amplification via interfering multi-photon processes in a half-waveguide quantum electrodynamics system
- Microwave interference from a spin ensemble and its mirror image in waveguide magnonics
- Loss-induced quantum nonreciprocity and entanglement in superconducting qubits
- Tunable frequency conversion and comb generation with a superconducting artificial atom
- Realizing on-demand all-to-all selective interactions between distant spin ensembles