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The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting

High-dimensional Quantum Teleportation, 12-photon Entanglement and Scattershot Boson Sampling based on Spontaneous Parametric Down-Conversion

Yi-Han Luo, Han-Sen Zhong, Manuel Erhard, Xi‐Lin Wang, Yuan Li, Li-Chao Peng, Mario Krenn, Xiao Qiang Jiang, Li Li, Nai-Le Liu, Chao‐Yang Lu, Anton Zeilinger, Jian-Wei Pan

Published Jan 1, 2019• 1 citation
Publisher

Abstract

We experimentally realize the first high-dimensional quantum teleportation experiment, and proposed a general method for teleporting n-dimensional photon. We developed an optimal SPDC entangled photon-pair source, and implement 12-photon entanglement and scattershot boson sampling.
DOI
10.1364/cqo.2019.w2b.3

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Entangled-photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design and realize a degenerate telecommunication wavelength entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which shows simultaneously 97% heralding efficiency and 96% indistinguishability between independent single photons without narrow-band filtering. Such a beamlike and frequency-uncorrelated SPDC source allows generation of the first 12-photon genuine entanglement with a state fidelity of 0.572±0.024. We further demonstrate a blueprint of scalable scattershot boson sampling using 12 SPDC sources and a 12×12 mode interferometer for three-, four-, and five-boson sampling, which yields count rates more than 4 orders of magnitude higher than all previous SPDC experiments.
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Quantum teleportation provides a way to transmit unknown quantum states from one location to another. In the quantum world, multilevel systems which enable high-dimensional systems are more prevalent. Therefore, to completely rebuild the quantum states of a single particle remotely, one needs to teleport multilevel (high-dimensional) states. Here, we demonstrate the teleportation of high-dimensional states in a three-dimensional six-photon system. We exploit the spatial mode of a single photon as the high-dimensional system, use two auxiliary entangled photons to realize a deterministic three-dimensional Bell state measurement. The fidelity of teleportation process matrix is F=0.596±0.037. Through this process matrix, we can prove that our teleportation is both nonclassical and genuine three dimensional. Our work paves the way to rebuild complex quantum systems remotely and to construct complex quantum networks.