Phys. Rev. Lett. 102, 173602 (2009) [4 pages]Microwave Photon Detector in Circuit QEDReceived 23 December 2008; published 29 April 2009 In this Letter we design a metamaterial composed of discrete superconducting elements that implements a high-efficiency microwave photon detector. Our design consists of a microwave guide coupled to an array of metastable quantum circuits, whose internal states are irreversibly changed due to the absorption of photons. This proposal can be widely applied to different physical systems and can be generalized to implement a microwave photon counter. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.173602
DOI:
10.1103/PhysRevLett.102.173602
PACS:
42.50.−p, 85.25.Pb, 85.60.Gz
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