Minimising quantum back action noise in quantum state tomography of cavities
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Minimising Quantum Back-Action Noise in Quantum State Tomography of Cavities. Bence Börcsök Mentors : Rana Adhikari , Yanbei Chen and Nicolas Smith-Lefebvre. Quantum Tomography. Reconstructing the quantum state of the system Deduce the Wigner-function. Broadband cavity.

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Minimising quantum back action noise in quantum state tomography of cavities

Minimising Quantum Back-Action Noise in Quantum State Tomography of Cavities

Bence Börcsök

Mentors: RanaAdhikari, YanbeiChenand Nicolas Smith-Lefebvre


Quantum tomography
Quantum Tomography of CavitiesTomography

  • Reconstructing the quantum state of the system

  • DeducetheWigner-function


Broadband cavity
Broadband Tomography of Cavitiescavity


Cavity with finite bandwidth
Cavity Tomography of Cavitieswithfinitebandwidth


Homodyne detection
Homodyne Tomography of Cavitiesdetection


Homodyne detection1
Homodyne Tomography of Cavitiesdetection

Outgoingopticalfield:Local oscillator:Photocurrent:Signal:


Normalisation
Normalisation Tomography of Cavities

We want:Constraints:


Result so far
Result Tomography of Cavitiesso far


Further work
Further Tomography of Cavitieswork

  • Calculatingthefullfilteringfunctionforboth quadratures

  • Obtainingthecovariancematrix

  • Comparingresultswithactualexperiments


Acknowledgement s
Acknowledgement Tomography of Cavitiess

  • RanaAdhikari, YanbeiChenand Nicolas Smith-Lefebvre

  • BassamHelou

  • Michael Coughlin

  • Alan Weinstein


General method
General Tomography of Cavitiesmethod


Solution in the frequency domain
Solution Tomography of Cavitiesinthefrequencydomain


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