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Journal of the Optical Society of America B

Quantum holographic teleportation of entangled two-color optical images

M. Yu. Saygin, A. S. Chirkin, Mikhail I. Kolobov

Published Jul 20, 2012• 10 citations
Publisher

Abstract

We introduce and theoretically investigate a scheme for teleportation of two-frequency entangled optical images in which the quantum channel is formed by four-frequency multimode states, generated in a single nonlinear photonic crystal by coupled parametric interactions. We study in detail the performance of the scheme. Namely, we evaluate its fidelity and the spatial-frequency spectra of the quadrature components characterizing the deterioration of the entanglement in the initial images due to the teleportation process. We analyze the influence of the spatial bandwidth of entanglement on the fidelity of teleportation. We investigate the performance of the scheme both in the near and the far diffraction field. Our analysis suggests that bandwidth matching of the quantum channel field with that of the images is generally necessary for high-quality teleportation. We show that entangled images are more fragile and more difficult to teleport than their coherent counterparts.

DOI
10.1364/josab.29.002090

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We introduce and theoretically investigate a scheme for teleportation of two-frequency entangled optical images in which the quantum channel is formed by four-frequency multimode states, generated in a single nonlinear photonic crystal by coupled parametric interactions. We study in detail the performance of the scheme. Namely, we evaluate its fidelity and the spatial-frequency spectra of the quadrature components characterizing the deterioration of the entanglement in the initial images due to the teleportation process. We analyze the influence of the spatial bandwidth of entanglement on the fidelity of teleportation. We investigate the performance of the scheme both in the near and the far diffraction field. Our analysis suggests that bandwidth matching of the quantum channel field with that of the images is generally necessary for high-quality teleportation. We show that entangled images are more fragile and more difficult to teleport than their coherent counterparts.
The teleportation of entangled optical images is for the first time considered. The scheme offered is based on process of four-partite state generation in coupled parametric interactions realizing in an aperiodic nonlinear photonic crystal. The coupled nonlinear optical process consists of one parametric down-conversion process which is followed by two up-conversion ones. We study nonclassical properties of the generated fields by analyzing the EPR correlations for different pairs of modes and carry out the comparison of the EPR correlations of the input and images output images and also calculate fidelity of the teleportation exploiting the covariance matrices of the images. We take into account the difference of spatial frequency bandwidths of the entangled images and fields generated in the coupled process. It has been established that under certain parameters of the scheme one can be obtain rather high fidelity of the teleportation and good preservation of the quantum correlations of the input images for all details of the images.
We consider the forming of a four-mode entangled state for continuous variables (CV) in coupled optical parametric processes. The processes comprise one down-conversion process and two up-conversion ones. Such interactions can simultaneously be realized in a single aperiodical nonlinear photonic crystal. To reveal the entanglement between continuous variables at generated frequencies, the different criteria of the separability have been applied. We also consider teleportation of two-mode entangled CV state using the created four-mode state. It is shown that in the proposed scheme the fidelity of entangled CV teleportation can be almost perfect.
Quantum teleportation, lying at the heart of a variety of quantum technologies, has inspired a widespread of research activities, most of which focused on 2-dimensional qubit states. Multilevel systems, qudits, promise to upgrade and inspire new technical developments in high-dimensional Hilbert space. Whereas, for high-dimensional teleportation, it routinely necessitates several ancillary photons in linear optical schemes. A fundamental open challenge remains as to whether we can teleport qudit states with bipartite entanglement only. Here we demonstrate such a high-dimensional teleportation using photonic orbital angular momentum (OAM). The so-called "perfect vortices" are exploited both for conducting the prerequisite entanglement concentration to prepare high-dimensional yet maximal OAM entanglement, and for performing faithful high-dimensional Bell sate measurements (HDBSM) based on sum-frequency generation. We experimentally achieve the average teleportation fidelity 0.8788$\pm$0.048 for a complete set of 3-dimensional mutually unbiased bases, for instance, conditional on three specific HDBSM results. More importantly, we succeed in realizing the first quantum teleportation of optical images by exploring full transverse spatial entanglement. From the multi-pixel field of view in the teleported images recorded by the ICCD camera, we estimate the effective channel capacity up to \k{appa} > 100. Our scheme holds promise for future high-volume quantum image transmission.
Abstract Quantum teleportation lies at the heart of a variety of quantum technologies, most of which, however, focused on 2-dimensional qubit states only. A fundamental open challenge remains as to whether we can teleport multilevel qudit states with bipartite entanglement. Here, we demonstrate such a high-dimensional teleportation using photonic orbital angular momentum (OAM). We exploit “perfect vortices” for preparing high-dimensional yet maximal OAM entanglement and for performing faithful high-dimensional Bell sate measurements (HDBSM) based on sum-frequency generation. We experimentally achieve the average teleportation fidelity 0.8788±0.048 for a complete set of 3-dimensional mutually unbiased bases. More importantly, we succeed in realizing the first quantum teleportation of optical images, with the effective channel capacity κ > 100. Our scheme holds promise for future high-volume quantum image transmission.
Quantum teleportation allows protected information exchange between distant parties, a crucial resource in future quantum networks. Using high-dimensional quantum states for teleportation offers the promise of higher information capacity channels, protection against optimal cloning machines and improved resilience to noise. However, such promising advantages are limited by the commonly used linear optical detection schemes that require ancillary photons, where the number of entangled photons grows with the dimension of the quantum state to be teleported. Here we overcome this restriction and experimentally realise the teleportation of high-dimensional states with just three photons, enabled by nonlinear optical detection. To create high-dimensional quantum states we employ photonic spatial modes and demonstrate a ten-dimensional teleportation channel, exceeding the state-of-the-art of two spatial modes for qubit teleportation and qutrit teleportation with four and five photons. Our experimental scheme is not basis dependent and easily scaled in dimension without changing its three-photon configuration, making high-dimensional teleportation practically feasible for future high-bandwidth robust quantum networks.