Local Current Injection into Mesoscopic Superconductors for the Manipulation of Quantum States
نویسندگان
چکیده
منابع مشابه
Local current injection into mesoscopic superconductors for the manipulation of quantum states.
We perform strategic current injection in a small mesoscopic superconductor and control the (non)equilibrium quantum states in an applied homogeneous magnetic field. In doing so, we realize a current-driven splitting of multiquanta vortices, current-induced transitions between states with different angular momenta, and current-controlled switching between otherwise degenerate quantum states. Th...
متن کاملEntanglement-assisted local manipulation of pure quantum states
We demonstrate that local transformations on a composite quantum system can be enhanced in the presence of certain entangled states. These extra states act much like catalysts in a chemical reaction: they allow otherwise impossible local transformations to be realised, without being consumed in any way. In particular, we show that this effect can considerably improve the efficiency of entanglem...
متن کاملMesoscopic superconductors under irradiation: Microwave spectroscopy of Andreev states
We show that irradiation of a voltage-biased superconducting quantum point contact at frequencies of the order of the gap energy can remove the suppression of subgap dc transport through Andreev levels. Quantum interference among resonant scattering events involving photon absorption is furthermore shown to make microwave spectroscopy of the Andreev levels feasible. We also discuss how the same...
متن کاملSurface superconducting states and paramagnetism in mesoscopic superconductors
In the framework of the Ginzburg-Landau equation, the temperature dependence of the upper critical field of small ring-like superconductors is studied. At equilibrium small parts of the phase diagram show paramagnetism for width / radius ratios below 0.85. Their number and extension increase with the size of the hole. In these regions, only the inner part of the ring shows a positive magnetic m...
متن کاملExperimental entanglement distillation of mesoscopic quantum states
Ruifang Dong, Mikael Lassen, 2 Joel Heersink, Christoph Marquardt, Radim Filip, 3 Gerd Leuchs, and Ulrik L. Andersen 2 Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky-Str. 1, 91058, Erlangen, Germany Department of Physics, Technical University of Denmark, Building 309, 2800 Lyngby, Denmark Department of Optics, Palacký...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2009
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.103.217003