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Browsing by Subject "Skammtafræði"

Browsing by Subject "Skammtafræði"

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  • Lowe, David A.; Thorlacius, Larus (Springer Nature, 2018-01)
    Holographic theories representing black holes are expected to exhibit quantum chaos. We argue if the laws of quantum mechanics are expected to hold for observers inside such black holes, then such holographic theories must have a mean field approximation ...
  • Gudmundsson, Vidar; Gestsson, Hallmann; Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Moldoveanu, Valeriu (2019-03-01)
    In this work, we theoretically model the time-dependent transport through an asymmetric double quantum dot etched in a two-dimensional wire embedded in a far-infrared (FIR) photon cavity. For the transient and the intermediate time regimes, the current ...
  • Keränen, Ville; Sybesma, Watse; Szepietowski, Phillip; Thorlacius, Larus (Springer Nature, 2017-05)
    The 2+1 dimensional quantum Lifshitz model can be generalised to a class of higher dimensional free field theories that exhibit Lifshitz scaling. When the dynamical critical exponent equals the number of spatial dimensions, equal time correlation ...
  • Holmlid, Leif; Olafsson, Sveinn (Elsevier BV, 2019-06)
    This work reports identification of muons by their characteristic life-time of 2.20 μs after laser-induction of their precursor mesons, both kaons K± and KL 0 and pions π± in ultra-dense hydrogen H(0). The pair-production signal from scattered muons ...
  • Gudmundsson, Vidar; Abdullah, Nzar; Sitek, Anna; Goan, Hsi-Sheng; Tang, Chi-Shung; Manolescu, Andrei (Wiley-Blackwell, 2017-12-07)
    We show that a Rabi-splitting of the states of strongly interacting electrons in parallel quantum dots embedded in a short quantum wire placed in a photon cavity can be produced by either the para- or the dia-magnetic electron-photon interactions ...
  • Kolb, Manuel; Garden, Anna; Badan, Cansin; Garrido Torres, Jose Antonio; Skulason, Egill; Juurlink, Ludo; Jónsson, Hannes; Koper, Marc (Royal Society of Chemistry (RSC), 2019-07-16)
    In this work we compute high-coverage hydrogen adsorption energies and geometries on the stepped platinum surfaces Pt(211) and Pt(533) which contain a (100)-step type and the Pt(221) and Pt(553) surface with a (111) step edge. We discuss these results ...
  • Angel Ramelli, Juan Fernando; Giangreco Puletti, Valentina; Thorlacius, Larus (Springer Science and Business Media LLC, 2019-08-01)
    We compute universal finite corrections to entanglement entropy for generalised quantum Lifshitz models in arbitrary odd spacetime dimensions. These are generalised free field theories with Lifshitz scaling symmetry, where the dynamical critical exponent ...
  • Zuppardo, Margherita; Ganardi, Ray; Miller, Marek; Bandyopadhyay, Somshubhro; Paterek, Tomasz (American Physical Society (APS), 2019-04-10)
    We characterize nonselective global projective measurements capable of increasing quantum entanglement between two particles. In particular, by choosing negativity to quantify entanglement, we show that entanglement of any pure nonmaximally entangled ...
  • Shahnazaryan, Vanik; Mughnetsyan, Vram; Shelykh, Ivan; Sarkisyan, Hayk (MDPI AG, 2019-10-16)
    We study theoretically the quantum states of two interacting excitons in coaxial double quantum rings. An interplay between exciton-exciton Coulomb interactions and specific geometry of the structure leads to the emergence of peculiar energy spectrum ...
  • Brown, Adam R.; Gharibyan, Hrant; Streicher, Alexandre; Susskind, Leonard; Thorlacius, Larus; Zhao, Ying (American Physical Society (APS), 2018-12-28)
    The growth of the “size” of operators is an important diagnostic of quantum chaos. Susskind conjectured that the holographic dual of the size is proportional to the average radial component of the momentum of the particle created by the operator. Thus ...
  • Moldoveanu, Valeriu; Manolescu, Andrei; Gudmundsson, Vidar (MDPI AG, 2019-07-25)
    We recall theoretical studies on transient transport through interacting mesoscopic systems. It is shown that a generalized master equation (GME) written and solved in terms of many-body states provides the suitable formal framework to capture both the ...
  • Lowe, David A.; Thorlacius, Larus (Springer Nature, 2016-12)
    We explore a version of black hole complementarity, where an approximate semiclassical effective field theory for interior infalling degrees of freedom emerges holo-graphically from an exact evolution of exterior degrees of freedom. The infalling degrees ...
  • Grozdanov, Sašo; Lucas, Andrew; Poovuttikul, Napat (American Physical Society (APS), 2019-04-15)
    Hydrodynamics is a theory of long-range excitations controlled by equations of motion that encode the conservation of a set of currents (energy, momentum, charge, etc.) associated with explicitly realized global symmetries. If a system possesses ...
  • Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Gudmundsson, Vidar (MDPI AG, 2019-07-17)
    We study the transport properties of a wire-dot system coupled to a cavity and a photon reservoir. The system is considered to be microstructured from a two-dimensional electron gas in a GaAs heterostructure. The 3D photon cavity is active in the ...
  • Fernández, Daniel; Rajagopal, Aruna; Thorlacius, Larus (Springer Science and Business Media LLC, 2019-12-01)
    We study out-of-equilibrium energy transport in a quantum critical fluid with Lifshitz scaling symmetry following a local quench between two semi-infinite fluid reservoirs. The late time energy flow is universal and is accommodated via a steady state ...
  • Abdullah, Nzar; Marif, Rawezh Bakr; Rashid, Hunar Omar (MDPI AG, 2019-03-21)
    We theoretically consider a short quantum wire, which on both ends is connected to leads that have different temperatures. The quantum wire is assumed to be coupled to a cavity with a single-photon mode. We calculate the heat and thermoelectric currents ...
  • Ásgeirsson, Vilhjálmur; Bauer, Christoph A.; Grimme, Stefan (Royal Society of Chemistry (RSC), 2017)
    We introduce a fully stand-alone version of the Quantum Chemistry Electron Ionization Mass Spectra (QCEIMS) program [S. Grimme, Angew. Chem. Int. Ed., 2013, 52, 6306] allowing efficient simulations for molecules composed of elements with atomic numbers ...
  • Vlasov, Sergei M. (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2017-12)
    Nanomagnetic systems and transitions between magnetic states are currently an active topic of research. Spintronics is, in particular, a new branch of science and technology where spin degrees of freedom and spin currents are used in an analogous way ...
  • Abdullah, Nzar (Elsevier BV, 2019-12)
    The transport properties of a wire-dot system coupled to a quantized single photon with linear polarization in a 3D-cavity is theoretically studied using a quantum master equation. The system is also coupled to a photon reservoir, environment. We ...
  • Juliusson, Haraldur Y.; Sigurdsson, Snorri (American Chemical Society (ACS), 2020-02-27)
    Electron paramagnetic resonance (EPR) spectroscopy, coupled with site-directed spin labeling (SDSL), is a useful method for studying conformational changes of biomolecules in cells. To employ in-cell EPR using nitroxide-based spin labels, the structure ...