Purification of photon subtraction from continuous squeezed light by filtering

Abstract

Photon subtraction from squeezed states is a powerful scheme to create good approximation of so-called Schrödinger cat states. However, conventional continuous-wave-based methods actually involve some impurity in squeezing of localized wavepackets, even in the ideal case of no optical losses. Here we theoretically discuss this impurity, by introducing mode-match of squeezing. Furthermore, here we propose a method to remove this impurity by filtering the photon-subtraction field. Our method in principle enables creation of pure photon-subtracted squeezed states, which was not possible with conventional methods.

10 pages, 6 figures

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Cited by in corpus (2)

• Generation of highly pure Schrödinger's cat states and real-time quadrature measurements via optical filtering
• Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime