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

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Published on: May 30, 2014

Experimentally simulating quantum walks with self-collimated light.

F Qi^1,2,3, Y F Wang², Q Y Ma^1,2,3

¹State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, CAS, No. 35A, Qinghua East Road, Haidian District, Beijing, Post Code: 100083, China.

Scientific Reports

|June 30, 2016

Summary

This summary is machine-generated.

Researchers simulated single-photon quantum walks using classical light in a photonic crystal chip. This compact device demonstrates high similarity between theoretical predictions and experimental results, paving the way for quantum circuits.

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Area of Science:

Photonics
Quantum Optics
Condensed Matter Physics

Background:

Self-collimated photonic crystals feature sub-wavelength air holes.
These structures create flattened equi-frequency curves, enabling diffraction-free light propagation.
This property is crucial for guiding photons in a quasi-uniform medium.

Purpose of the Study:

To experimentally simulate four-step single-photon discrete time quantum walks.
To utilize classical light within a photonic crystal chip for quantum simulation.
To assess the feasibility of photonic crystals for constructing quantum circuits.

Main Methods:

Fabrication of a photonic crystal chip on a silicon-on-insulator platform.
Experimental simulation of discrete time quantum walks using classical light.
Comparison of experimental outcomes with theoretical predictions.

Main Results:

Successful simulation of four-step single-photon discrete time quantum walks.
Achieved a high similarity score (greater than 0.98) between theoretical and experimental results.
Demonstrated the compact nature of the functional area.

Conclusions:

Photonic crystal chips can effectively simulate quantum phenomena like quantum walks.
The experimental setup shows high fidelity, validating the theoretical models.
The compact and scalable design offers potential for building complex linear quantum circuits.