Now showing items 1-11 of 11

    • Cavity enhanced atomic magnetometry 

      Crepaz, Herbert; Ley, Li Yuan; Dumke, Rainer (2015)
      Atom sensing based on Faraday rotation is an indispensable method for precision measurements, universally suitable for both hot and cold atomic systems. Here we demonstrate an all-optical magnetometer where the optical ...
    • Design of an experimental platform for hybridization of atomic and superconducting quantum systems 

      Landra, Alessandro; Hufnagel, Christoph; Chean, Lim Chin; Weigner, Thomas; Yap, Yung Szen; Nguyen, Long Hoang; Dumke, Rainer (2019)
      Hybrid quantum systems have the potential of mitigating current challenges in developing a scalable quantum computer. Of particular interest is the hybridization between atomic and superconducting qubits. We demonstrate ...
    • Feedback control of persistent-current oscillation based on the atomic-clock technique 

      Yu, Deshui; Dumke, Rainer (2018)
      We propose a scheme of stabilizing the persistent-current Rabi oscillation based on the flux qubit-resonator-atom hybrid structure. The low-Q LC resonator weakly interacts with the flux qubit and maps the persistent-current ...
    • In-vivo biomagnetic characterisation of the American cockroach 

      Kong, Ling-Jun; Crepaz, Herbert; Górecka, Agnieszka; Urbanek, Aleksandra; Dumke, Rainer; Paterek, Tomasz (2018)
      We present a quantitative method, utilising a highly sensitive quantum sensor, that extends applicability of magnetorelaxometry to biological samples at physiological temperature. The observed magnetic fields allow for ...
    • Nonlinear circuit quantum electrodynamics based on the charge-qubit–resonator interface 

      Yu, Deshui; Kwek, Leong Chuan; Amico, Luigi; Dumke, Rainer (2018)
      We theoretically explore the applications of a nonlinear circuit QED system, where a charge qubit is inductively coupled to an LC resonator, in the photonic engineering and ultrastrong-coupling multiphoton quantum optics. ...
    • Optically tailored trapping geometries for ultracold atoms on a type-II superconducting chip 

      Tosto, Francesca; Swe, Phyo Baw; Nguyen, Nghia Tin; Hufnagel, Christoph; Valado, María Martínez; Prigozhin, Leonid; Sokolovsky, Vladimir; Dumke, Rainer (2019)
      Superconducting atom chips have very significant advantages in realizing trapping structures for ultracold atoms compared to conventional atom chips. We extend these advantages further by developing the ability to dynamically ...
    • Readout of the atomtronic quantum interference device 

      Haug, Tobias; Tan, Joel; Theng, Mark; Dumke, Rainer; Kwek, Leong-Chuan; Amico, Luigi (2018)
      A Bose-Einstein condensate confined in ring shaped lattices interrupted by a weak link and pierced by an effective magnetic flux defines the atomic counterpart of the superconducting quantum interference device: the ...
    • Superconducting atom chips : towards quantum hybridization 

      Hufnagel, Christoph; Landra, Alessandro; Lim, Chin Chean; Yu, Deshui; Dumke, Rainer (2017)
      Atomic-superconducting hybrid systems are of particular interest as they are combining the long coherence times of ultracold atoms and fast gate operation times of superconducting circuits. Here we discuss an experimental ...
    • Superconducting resonator and Rydberg atom hybrid system in the strong coupling regime 

      Yu, Deshui; Landra, Alessandro; Valado, María Martínez; Hufnagel, Christoph; Kwek, Leong Chuan; Amico, Luigi; Dumke, Rainer (2016)
      We propose a promising hybrid quantum system, where a highly excited atom strongly interacts with a superconducting LC oscillator via the electric field of capacitor. An external electrostatic field is applied to tune the ...
    • Superfluid qubit systems with ring shaped optical lattices 

      Amico, Luigi; Aghamalyan, Davit; Auksztol, Filip; Crepaz, Herbert; Dumke, Rainer; Kwek, Leong Chuan (2014)
      We study an experimentally feasible qubit system employing neutral atomic currents. Our system is based on bosonic cold atoms trapped in ring-shaped optical lattice potentials. The lattice makes the system strictly one ...
    • Two-dimensional network of atomtronic qubits 

      Safaei, S.; Grémaud, B.; Dumke, Rainer; Kwek, Leong-Chuan; Amico, L.; Miniatura, Christian (2018)
      Through a combination of laser beams, we engineer a two-dimensional optical lattice of Mexican hat potentials able to host atoms in its ring-shaped wells. When tunneling can be ignored (at high laser intensities), we show ...