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Related Experiment Video

Updated: May 8, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Non-classicality and the effect of one photon.

Christopher C Gerry¹, Richard J Birrittella², Paul M Alsing³

¹Department of Physics and Astronomy, Lehman College, The City University of New York, Bronx, NY 10468-1589, USA.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences

|December 24, 2024

Summary

Investigating quantum interference, this study shows how a single photon

Keywords:

non-classical quantum quantum interference

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Last Updated: May 8, 2025

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Area of Science:

Quantum optics
Quantum information science

Background:

Quantum states of light exhibit diverse properties, ranging from highly non-classical (number states) to classical-like (coherent states).
Understanding the interference effects between these distinct quantum states is crucial for advancing quantum technologies.

Purpose of the Study:

To investigate the quantum interference effects when mixing number states with coherent states of light.
To analyze how the non-classicality of a single photon influences the statistical properties of the output field.
To determine the dependence of output entanglement on the amplitude of the coherent state.

Main Methods:

Theoretical analysis of quantum interference between number states and coherent states.
Mathematical modeling of the transformation of statistical properties due to single-photon mixing.
Investigation of entanglement properties in the output field.

Main Results:

Mixing a single photon with a coherent state significantly alters the output's statistical properties.
The entanglement of the output field remains invariant, irrespective of the coherent state's amplitude.
Quantum interference effects are demonstrated to modify the non-classical characteristics of light.

Conclusions:

The non-classicality of a single photon plays a key role in modifying light's statistical properties upon mixing with coherent fields.
Entanglement in the output is robust against variations in the coherent state amplitude.
This research provides insights into controlling quantum states of light for potential applications in quantum information processing.