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Quantum optics in One-dimensional photonic reservoirs

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We review the recent experimental progress on the use of quantum dots coupled to photonic-crystal waveguides [1]. We show that single photons can be channeled into the waveguide with an efficiency exceeding 98% [2] and discuss a how chiral photon-emission can be achieved in specifically prepared waveguides enabling construction of non-reciprocol integrated photonic devices [3]. Finally, we discuss the prospects of scaling the platform to larger quantum architectures for applications in quantum-information processing, such as efficient photon sorting [4]. References [1] P. Lodahl, S. Mahmoodian, and S. Stobbe, “Interfacing single photons and single quantum dots with photonic nanostructures.” To appear in Rev. Mod. Phys. arXiv:1312.1079. [2] M. Arcari, I. Söllner, A. Javadi, S.L. Hansen, S. Mahmoodian, J. Liu, H. Thyrrestrup, E.H. Lee, J.D. Song, S. Stobbe, and P. Lodahl, “Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide.” Physical Review Letters 113, 093603 (2014). [3] I. Söllner, S. Mahmoodian, S. Lindskov Hansen, L. Midolo, A. Javadi, G. Kiršanskė, T. Pregnolato, H. El-Ella, E.H. Lee, J.D. Song, S. Stobbe and P. Lodahl, “Deterministic photon-emitter coupling in chiral photonic circuits”. arXiv: 1406.4295. [4] T.C. Ralph, I. Söllner, S. Mahmoodian, A.G. White, and P. Lodahl, ”Photon sorting, efficient Bell measurements and a deterministic CZ gate using a passive two-level nonlinearity”, arXiv: 1502.04261.

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