Microwave Measurement beyond the Quantum Limit with a Nonreciprocal Amplifier
نویسندگان
چکیده
منابع مشابه
Microwave Amplifier Figure of Merit Measurement
Fig.2 Amplifier under test. Amplifiers can operate in classes A, B, AB, C, D, E and F [2]. We tested class A amplifier made by „Microwave Power Devices“, Model: LWA 4690-1/1837, based on bipolar devices (Fig.2). Usually, 1dB compression point, gain and two-tone third-order intercept point are measured as the amplifier figure of merit. As specified by manufacturer, the frequency range of the amp...
متن کاملThe Problem of Quantum Measurement Quantum Measurement as Thermodynamic Limit
We derive the probabilities of measurement results from Schroedinger’s equation plus a definition of macroscopic as a particular kind of thermodynamic limit. Bohr’s insight that a measurement apparatus must be classical in nature and classically describable is made precise in a mathematical sense analogous to the procedures of classical statistical mechanics and the study of Hamiltonian heat ba...
متن کاملNonreciprocal microwave band-gap structures.
An electrically controlled nonreciprocal electromagnetic band-gap material is proposed and studied. The new material is a periodic three-dimensional regular lattice of small magnetized ferrite spheres. In this paper, we consider plane electromagnetic waves in this medium and design an analytical model for the material parameters. An analytical solution for plane-wave reflection from a planar in...
متن کاملSideband Cooling Beyond the Quantum Limit with Squeezed Light
Quantum fluctuations of the electromagnetic vacuum produce measurable physical effects such as Casimir forces and the Lamb shift [1]. Similarly, these fluctuations also impose an observable quantum limit to the lowest temperatures that can be reached with conventional laser cooling techniques [2, 3]. As laser cooling experiments continue to bring massive mechanical systems to unprecedented temp...
متن کاملInformation for “ Quantum nondemolition measurement of mechanical squeezed state beyond the 3 dB limit ”
C. U. Lei, A. J. Weinstein, J. Suh, E. E. Wollman, A. Kronwald, F. Marquardt, A. A. Clerk, K. C. Schwab Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 7, D-91058 Erlangen, Germany Max Planck Institute for the Science of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Applied
سال: 2020
ISSN: 2331-7019
DOI: 10.1103/physrevapplied.13.044005