期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.053601
关键词
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资金
- Swedish Research Council
- Wallenberg Foundation
- STINT
- EU through the ERC
- project SOLID
- project PROMISCE
- ARC Research Fellowship program
- ARC Centre of Excellence in Engineered Quantum Systems
We investigate the effective interaction between two microwave fields, mediated by a transmon-type superconducting artificial atom which is strongly coupled to a coplanar transmission line. The interaction between the fields and atom produces an effective cross-Kerr coupling. We demonstrate average cross-Kerr phase shifts of up to 20 degrees per photon with both coherent microwave fields at the single-photon level. Our results provide an important step toward quantum applications with propagating microwave photons.
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