Exploiting Kerr Cross Non-linearity in Circuit Quantum Electrodynamics for Non-demolition Measurements

Exploiting Kerr Cross Non-linearity in Circuit Quantum Electrodynamics for Non-demolition Measurements

We propose a scheme for dispersive readout of stored energy in one mode of a nonlinear superconducting microwave ring resonator by detection of the frequency shift of a second mode coupled to the first via a Kerr nonlinearity. Symmetry is used to enhance the device responsivity while minimizing self...

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Veröffentlicht in:arXiv.org 2010-02
Hauptverfasser: Kumar, Shwetank, DiVincenzo, David P
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Sprache:eng
Schlagworte:
Coupled modes
Demolition
Frequency shift
Internal energy
Linearity
Nonlinearity
Physics - Mesoscale and Nanoscale Physics
Physics - Quantum Physics
Quantum electrodynamics
Quantum theory
Signal to noise ratio
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description We propose a scheme for dispersive readout of stored energy in one mode of a nonlinear superconducting microwave ring resonator by detection of the frequency shift of a second mode coupled to the first via a Kerr nonlinearity. Symmetry is used to enhance the device responsivity while minimizing self nonlinearity of each mode. Assessment of the signal to noise ratio indicates that the scheme will function at the single photon level, allowing quantum non-demolition measurement of the photon number state of one mode. Experimental data from a simplified version of the device demonstrating the principle of operation are presented.
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subjects Coupled modes
Demolition
Frequency shift
Internal energy
Linearity
Nonlinearity
Physics - Mesoscale and Nanoscale Physics
Physics - Quantum Physics
Quantum electrodynamics
Quantum theory
Signal to noise ratio
title Exploiting Kerr Cross Non-linearity in Circuit Quantum Electrodynamics for Non-demolition Measurements
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