Browsing by Subject "quantum"

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  • Equilibration towards generalized Gibbs ensembles in non-interacting theories 
    Gluza, Marek; Eisert, Jens; Farrelly, Terry (Amsterdam : SciPost Foundation, 2019)
    Even after almost a century, the foundations of quantum statistical mechanics are still not completely understood. In this work, we provide a precise account on these foundations for a class of systems of paradigmatic ...
  • Measurement of finite-frequency current statistics in a single-electron transistor 
    Ubbelohde, Niels; Fricke, Christian; Flindt, Christian; Hohls, Frank; Haug, Rolf J. (Lausanne : Frontiers Research Foundation, 2012-01)
    Electron transport in nanoscale structures is strongly influenced by the Coulomb interaction that gives rise to correlations in the stream of charges and leaves clear fingerprints in the fluctuations of the electrical ...
  • Non-equilibrium dynamics of dipolar polarons 
    Volosniev, Artem G.; Bighin, Giacomo; Santos, Luis; Peña Ardila, Luisllu A. (Amsterdam : SciPost Foundation, 2023)
    We study the out-of-equilibrium quantum dynamics of dipolar polarons, i.e., impurities immersed in a dipolar Bose-Einstein condensate, after a quench of the impurity-boson interaction. We show that the dipolar nature of ...
  • Number-phase uncertainty relations and bipartite entanglement detection in spin ensembles 
    Vitagliano, Giuseppe; Fadel, Matteo; Apellaniz, Iagoba; Kleinmann, Matthias; Lücke, Bernd; Klempt, Carsten; Tóth, Géza (Wien : Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2023)
    We present a method to detect bipartite entanglement based on number-phase-like uncertainty relations in split spin ensembles. First, we derive an uncertainty relation that plays the role of a number-phase uncertainty for ...
  • Perturbative 2-body parent Hamiltonians for projected entangled pair states 
    Brell, Courtney G.; Bartlett, Stephen D.; Doherty, Andrew C. (Bristol : IOP Publishing Ltd., 2014-12-22)
    We construct parent Hamiltonians involving only local 2-body interactions for a broad class of projected entangled pair states (PEPS). Making use of perturbation gadget techniques, we define a perturbative Hamiltonian ...
  • Phase magnification by two-axis countertwisting for detection-noise robust interferometry 
    Anders, Fabian; Pezze, Luca; Smerzi, Augusto; Klempt, Carsten (College Park : American Physical Society, 2018)
    Entanglement-enhanced atom interferometry has the potential of surpassing the standard quantum limit and eventually reaching the ultimate Heisenberg bound. The experimental progress is, however, hindered by various technical ...
  • Precision spectroscopy by photon-recoil signal amplification 
    Wan, Yong; Gebert, Florian; Wuebbena, Jannes B.; Scharnhorst, Nils; Amairi, Sana; Leroux, Ian D.; Hemmerling, Boerge; Loerch, Niels; Hammerer, Klemens; Schmidt, Piet O. (London : Nature Publishing Group, 2014)
    Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Quantum logic spectroscopy has overcome ...
  • Preparation of Ultracold Atom Clouds at the Shot Noise Level 
    Gajdacz, M.; Hilliard, A.J.; Kristensen, M.A.; Pedersen, P.L.; Klempt, Carsten; Arlt, Jan J.; Sherson, J.F. (College Park : American Physical Society, 2016)
    We prepare number stabilized ultracold atom clouds through the real-time analysis of nondestructive images and the application of feedback. In our experiments, the atom number N similar to 10(6) is determined by high ...
  • Prospect for precision quantum logic spectroscopy of vibrational overtone transitions in molecular oxygen ions 
    Wolf, Fabian; Heip, Jan C.; Zawierucha, Maximilian J.; Shi, Chunyan; Ospelkaus, Silke; Schmidt, Piet O. ([Bad Honnef] : Dt. Physikalische Ges., 2024)
    Precision spectroscopy has been the driving force for progress of our physical understanding and still is a promising tool for the investigation of new physics. Molecules offer transitions which allow tests that are not ...
  • Transmission amplitudes from Bethe ansatz equations 
    Doikou, Anastasia; Karaiskos, Nikos (New York, NY : Springer International Publishing, 2013)
    We consider the Heisenberg spin chain in the presence of integrable spin defects. Using the Bethe ansatz methodology, we extract the associated transmission amplitudes, that describe the interaction between the particle-like ...