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Quantum Nondemolition Detection of a Propagating Microwave Photon

Sankar Raman Sathyamoorthy (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; Lars Tornberg (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; Anton Frisk Kockum (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; B. Q. Baragiola ; J. Combes ; Christopher Wilson (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; T. M. Stace ; Göran Johansson (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik)
Physical Review Letters (0031-9007). Vol. 112 (2014), 9, p. art. no. 093601.
[Artikel, refereegranskad vetenskaplig]

The ability to nondestructively detect the presence of a single, traveling photon has been a long-standing goal in optics, with applications in quantum information and measurement. Realizing such a detector is complicated by the fact that photon-photon interactions are typically very weak. At microwave frequencies, very strong effective photon-photon interactions in a waveguide have recently been demonstrated. Here we show how this type of interaction can be used to realize a quantum nondemolition measurement of a single propagating microwave photon. The scheme we propose uses a chain of solid-state three-level systems (transmons) cascaded through circulators which suppress photon backscattering. Our theoretical analysis shows that microwave-photon detection with fidelity around 90% can be realized with existing technologies.

Nyckelord: FIELD, CIRCUIT, NUMBER



Denna post skapades 2014-04-03. Senast ändrad 2015-03-06.
CPL Pubid: 196143

 

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