Optical parametric amplification protocols for quantum nondemolition measurement
AssigneesCalifornia Institute of Technology, The Board of Trustees of the Leland Stanford Junior University, NTT Research, Inc.
InventorsRajveer Nehra, Ryotatsu Yanagimoto, Ryan Hamerly, Edwin Ng, Alireza Marandi, Hideo Mabuchi
Life of this patent
Estimating the term…
Abstract
Methods and systems are presented for using optical parametric amplifiers in various ways that enhance a native quadratic coupling strength so that a photonic component of interest can be measured or otherwise observed without demolishing the component of interest at a system output. For example such components may include a number of signal Bogoliubov excitations, a pump modular quadrature, or a signal quadrature squared.
Claims19
A quantum detection method comprising:
- configuring a first quadratic coupling strength within one or more optical media that implement one or more optical parametric amplifiers (OPAs);
- obtaining a first input state including one or more photonic components;
- establishing a first nonlinearity enhancement coupling so that said first quadratic coupling strength in said one or more OPAs is enhanced with an additional quadratic coupling strength that is larger than said first quadratic coupling strength;
- transmitting a first output that includes a first photonic component of said one or more photonic components via a first output port;
- and
- transmitting via said first nonlinearity enhancement coupling a first extraction result that encodes said first photonic component of said first input state via a second output port without demolishing said first photonic component of said first output.
A quantum detection system comprising:
- means for obtaining a first input state including one or more photonic components;
- means for establishing a first nonlinearity enhancement coupling so that said first quadratic coupling strength in said one or more OPAs is enhanced with an additional quadratic coupling strength that is larger than said first quadratic coupling strength;
- means for transmitting a first output that includes a first photonic component of said one or more photonic components via a first output port;
- and
- means for transmitting via said first nonlinearity enhancement coupling a first extraction result that encodes said first photonic component of said first input state via a second output port without demolishing said first photonic component of said first output.
Dependencies are inferred from the claim text.