Detector of single microwave photons propagating in a guide
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 9, 2016
Grant Date -
Oct 24, 2013
app pub date -
Sep 20, 2011
filing date -
Sep 20, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention introduces a detector that is able to detect single microwave photons propagating in a waveguide. The waveguide of the invention is lowered to a temperature where it becomes superconductive. Disposed between a middle wire and a ground plane of the waveguide is a very small piece of a desired normal metal, whereby so-called SN contacts are formed between these materials. A separate reflection measurement circuit is coupled to the normal metal piece. When the impedance of the waveguide is matched to the impedance of the normal metal piece as well as possible, a photon propagating in the waveguide is most likely absorbed in the normal metal. The absorption slightly raises the temperature of the piece, which further changes the impedance observed in a so-called SIN junction between the reflection measurement circuit and the piece. The changed amplitude and phase are detectable at the outlet obtained from a mixer of the reflection measurement circuit, whereby a single absorbed photon can be detected. In principle, the present method and device enable quantum calculation in view of future applications.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully