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Single calcium-40 ion as quantum memory for photon polarization: a case study

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Abstract

We present several schemes for heralded storage of polarization states of single photons in single ions, using the 40Ca+ ion and photons at 854 nm wavelength as specific example. We compare the efficiencies of the schemes and the requirements for their implementation with respect to the preparation of the initial state of the ion, the absorption process and its analysis. These schemes may be used to create and herald entanglement of two distant ions through entanglement swapping; they are easily adapted to other atomic systems and wavelengths.

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Acknowledgments

The authors wish to thank Nicolas Sangouard for motivating discussions. This work was partially supported by the BMBF (Verbundprojekt QuOReP, CHIST-ERA project QScale), the German Scholars Organization/Alfred Krupp von Bohlen und Halbach-Stiftung, the EU (AQUTE Integrating Project), and the ESF (IOTA COST Action).

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  1. Experimentalphysik, Universität des Saarlandes, Campus E 2 6, 66123, Saarbrücken, Germany

    Philipp Müller & Jürgen Eschner

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  1. Philipp Müller
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  2. Jürgen Eschner
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Correspondence to Philipp Müller.

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Müller, P., Eschner, J. Single calcium-40 ion as quantum memory for photon polarization: a case study. Appl. Phys. B 114, 303–306 (2014). https://doi.org/10.1007/s00340-013-5681-1

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