Quantum noise limits for a class of nonlinear amplifiers
ORAL
Abstract
We introduce a class of nonlinear amplifier input-output relations that allow the measurement of any normal operator using linear measurements with only vacuum fluctuations added at the output. In the limit of large gain, such devices would effectively implement perfect measurements of nonlinear operators in the same way that linear amplifiers permit effectively perfect linear measurements even when paired with realistic, noisy measurement devices. We analyze the application of these amplifiers to photon number measurements and state estimation.
*JE was supported by the Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program. JC was supported by the Australian Research Council through a Discovery Early Career Researcher Award (DE160100356)
and via the Centre of Excellence in Engineered Quantum Systems (EQuS), project number CE170100009.
–
Presenters
-
Jeffrey Epstein
- Physics, Univ of California - Berkeley
- Berkeley Quantum Information & Computation Center, University of California, Berkeley
- Physics, University of California, Berkeley
- University of California, Berkeley