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Waveguide QED in superconducting circuits
Nakamura, Yasunobu - University of Tokyo
Presentation on Thursday, Nov. 19, 2020, 6 p.m.
Location: Online
Photons are the quantum of the electromagnetic field. They are pretty wild if released in a two- or three-dimensional open space; then, it is rather difficult to tame them properly. On the other hand, in zero- and one-dimensional modes, they are much more obedient. That is why the ideas of cavity quantum electrodynamics (cavity QED) and waveguide quantum electrodynamics (waveguide QED) have been developed in order to control quantum properties of photons as well as their interaction with a matter, or another local excitation mode. We use superconducting circuits as a versatile platform for cavity- and waveguide-QED experiments in the microwave domain, where strong nonlinearity provided by Josephson junctions allows us to manipulate and measure quantum states of microwave modes. We will introduce implementations of quantum optical tools, such as microwave single-photon detectors [1, 2] and single-photon sources [3, 4] in the context of waveguide QED. They can be building blocks for a microwave quantum network.
References
[1] K. Inomata et al., Nature Commun. 7, 12303 (2016).
[2] S. Kono et al., Nature Physics 14, 546 (2018).
[3] J. Ilves et al., npj Quantum Information 6, 34 (2020).
[4] N. Gheeraert et al., arXiv:2004.01924 (2020).