Quantum-information processing with solid-state single-photon sources

P. LodahlNiels Bohr Institute, University of Copenhagen, DenmarkWe review the recent experimental progress on the use of quantum dots coupled to photonic-crystalwaveguides enabling unique ways of engineering light-matter interaction [1]. We show that singlephotons and single quantum emitters can be deterministically coupled as a basis of single-photonsources [2] and single-photonnonlinearity [3]. Wefurthermore discuss how chiralphoton emission can beachieved in specifically preparedwaveguides enablingconstruction of non-reciprocalintegrated photonicdevices [4]. Finally, we discuss theprospects of scaling theplatform to larger quantumarchitectures forapplications in quantum-informationprocessing. Oneparticular application involves usingphoton scattering andnonlinear conversion to achieve photon sorting enabling deterministic Bell-state measurements [5].Other possible applications include boson sampling or the generation of large-scale entangledphoton-cluster states. Contact:Prof. Dr. Christine [email protected][1] P. Lodahl, S. Mahmoodian, and S. Stobbe, Reviews of Modern Physics 87, 347 (2015). [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, Physical Review Letters 113, 093603 (2014). [3] A. Javadi, I. Sollner, M. Arcari, S.L. Hansen, L. Midolo, S. Mahmoodian, G. Kirsanske, T.Pregnolato, E. H. Lee, J. D. Song, S. Stobbe, and P. Lodahl, Nature Communications 6, 8655(2015).[4] 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, Nature Nanotechnology 10, 775 (2015).[5] T.C. Ralph, I. Söllner, S. Mahmoodian, A.G. White, and P. Lodahl, Physical Review Letters 114,173603 (2015).