Now showing items 1-6 of 6

    • Long-term laser frequency stabilization using fiber interferometers 

      Kong, Jia; Lucivero, Vito Giovanni; Jiménez-Martínez, Ricardo; Mitchell, Morgan W. (AIP, 2015-07-09)
      Article
      Open Access
      We report long-term laser frequency stabilization using only the target laser and a pair of 5 m fiber interferometers, one as a frequency reference and the second as a sensitive thermometer to stabilize the frequency ...
    • Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres 

      Hensen, B.; Bernien, H.; Dréau, A. E.; Reiserer, A.; Kalb, N.; Blok, M. S.; Ruitenberg, J.; Vermeulen, R. F. L.; Schouten, R. N.; Abellán, Carlos, 1990-; Amaya, W.; Pruneri, P.; Mitchell, Morgan W.; Markham, M.; Twitchen, D. J.; Elkouss, D.; Wehner, S.; Taminiau, T. H.; Hanson, R. (Nature Publishing Group, 2015-10-21)
      Article
      Restricted access - publisher's policy
      More than 50 years ago1, John Bell proved that no theory of nature that obeys locality and realism2 can reproduce all the predictions of quantum theory: in any local-realist theory, the correlations between outcomes of ...
    • Macroscopic Quantum State Analyzed Particle by Particle 

      Beduini, Federica A.; Zielińska, Joanna Ada; Lucivero, Vito G.; Icaza Astiz, Yannick A. de; Mitchell, Morgan W. (ACS Publications, 2015-03-27)
      Article
      Open Access
      Macroscopic quantum phenomena, e.g., superconductivity and squeezing, are believed to result from entanglement of macroscopic numbers of particles. We report the first direct study of this kind of entanglement: we use ...
    • Passive Decoy-State Quantum Key Distribution with Coherent Light 

      Curty, Marcos; Jofre, Marc; Pruneri, Valerio; Mitchell, Morgan W. (MDPI, 2015-06-12)
      Article
      Open Access
      Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ...
    • Phase-stable source of polarization-entangled photons in a linear double-pass configuration 

      Steinlechner, F.; Ramelow, Sven; Jofre, Martí; Gilaberte, Marta; Jennewein, Thomas; Pérez Torres, Juan; Mitchell, Morgan W.; Pruneri, Valerio (2013-05)
      Article
      Open Access
      We demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional down-conversion in a novel ‘folded sandwich’ configuration. Bi-directionally pumping a single ...
    • Quantum atom-light interfaces in the Gaussian description for spin-1 systems 

      Colangelo, Giorgio; Sewell, Robert J.; Behbood, Naeimeh; Ciurana, Ferran Martin; Triginer Cahelles, Joaquim; Mitchell, Morgan W. (2013-10)
      Article
      Open Access
      We extend the covariance matrix description of atom–light quantum interfaces, originally developed for real and effective spin-1/2 atoms, to include ‘spin alignment’ degrees of freedom. This allows accurate modelling ...