• α clustering in ²⁸Si probed through the identification of high-lying 0⁺ states 

      Adsley, P.; Jenkins, D. G.; Cseh, J.; Dimitriova, S. S.; Brummer, J. W.; Li, K. C. W.; Marin-Lambarri, D. J.; Lukyanov, K.; Kheswa, N. Y.; Neveling, R.; Papka, P.; Pellegri, L.; Pesudo, V.; Pool, L. C.; Riczu, G.; Smit, F. D.; Van Zyl, J. J.; Zemlyanaya, E. (American Physical Society, 2017)
      Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as ¹²C and ¹⁶O. Such structures are ...
    • Vacuum polarization energy for general backgrounds in one space dimension 

      Weigel, H. (Elsevier, 2017)
      For field theories in one time and one space dimensions we propose an efficient method to compute the vacuum polarization energy of static field configurations that do not allow a decomposition into symmetric and anti-symmetric ...
    • Universal equilibrium scaling functions at short times after a quench 

      Karl, Markus; Cakir, Halil; Halimeh, Jad C.; Oberthaler, Markus K.; Kastner, Michael; Gasenzer, Thomas (American Physical Society, 2017)
      By analyzing spin-spin correlation functions at relatively short distances,we showthat equilibrium near-critical properties can be extracted at short times after quenches into the vicinity of a quantum critical point. The ...
    • Superfluid filaments of dipolar bosons in free space 

      Cinti, Fabio; Cappellaro, Alberto; Salasnich, Luca; Macri, Tommaso (American Physical Society, 2017)
      We systematically investigate the zero temperature phase diagram of bosons interacting via dipolar interactions in three dimensions in free space via path integral Monte Carlo simulations with a few hundreds of particles ...
    • Solving Dirac equations on a 3D lattice with inverse Hamiltonian and spectral methods 

      Ren, Z. X.; Zhang, S. Q.; Meng, J. (American Physical Society, 2017)
      A new method to solve the Dirac equation on a 3D lattice is proposed, in which the variational collapse problem is avoided by the inverse Hamiltonian method and the fermion doubling problem is avoided by performing spatial ...
    • Self-consistent relativistic quasiparticle random-phase approximation and its applications to charge-exchange excitations 

      Niu, Z. M.; Niu, Y. F.; Liang, H. Z.; Long, W. H.; Meng, J. (American Physical Society, 2017)
      The self-consistent quasiparticle random-phase approximation (QRPA) approach is formulated in the canonical single-nucleon basis of the relativistic Hatree–Fock–Bogoliubov (RHFB) theory. This approach is applied to study ...
    • Search for highly excited states in ²⁸Si 

      Montanari, D.; Courtin, S.; Jenkins, D. G.; Diget, C.; Yavuzkanat, N.; Neveling, R.; Mira, J. P.; Nemulodi, F.; Smit, F. D.; Usman, I.; Papka, P.; Swartz, J. A.; Van Zyl, J. J.; Orce, N. (IOP Publishing, 2017)
      The theoretical and experimental determination of superdeformed states in nuclei in the mass region A≤40 has been since a long time one of the major challenges of nuclear structure studies. Despite the considerable ...
    • Scattering in a three-dimensional fuzzy space 

      Kriel, J. N.; Groenewald, H. W.; Scholtz, F. G. (American Physical Society, 2017)
      We develop scattering theory in a noncommutative space defined by an su(2) coordinate algebra. By introducing a positive operator valued measure as a replacement for strong position measurements, we are able to derive ...
    • Quantum stabilization of a hedgehog type of cosmic string 

      Quandt, M.; Graham, N.; Weigel, H. (Elsevier, 2017)
      Within a slightly simplified version of the electroweak standard model we investigate the stabilization of cosmic strings by fermion quantum fluctuations. Previous studies of quantum energies considered variants of the ...
    • Quantum effects in the cooperative scattering of light by atomic clouds 

      Pucci, Lorenzo; Roy, Analabha; Santo, Tiago Santiago do Espirito; Kaiser, Robin; Kastner, Michael; Bachelard, Romain (American Physical Society, 2017)
      Scattering of classical light by atomic clouds induces photon-mediated effective long-range interactions between the atoms and leads to cooperative effects even at low atomic densities. We introduce a simulation technique ...
    • PT-symmetric waveguide system with evidence of a third-order exceptional point 

      Schnabel, Jan; Cartarius, Holger; Main, Jorg; Wunner, Gunter; Heiss, Walter Dieter (American Physical Society, 2017)
      An experimental setup of three coupled PT -symmetric waveguides showing the characteristics of a third-order exceptional point (EP3) has been investigated by Heiss and Wunner in an idealized model of three δ-function waveguides ...
    • Prethermalization and persistent order in the absence of a thermal phase transition 

      Halimeh, Jad C.; Zauner-Stauber, Valentin; McCulloch, Ian P.; De Vega, Ines; Schollwock, Ulrich; Kastner, Michael (American Physical Society, 2017)
      We numerically study the dynamics after a parameter quench in the one-dimensional transverse-field Ising model with long-range interactions (∝1/rα with distance r), for finite chains and also directly in the thermodynamic ...
    • A pilot study investigating the presence of voids in bulk fill flowable composites 

      Mulder, R.; Mohammed, N.; Du Plessis, A.; Le Roux, S. G. (South African Dental Association, 2017)
      OBJECTIVE: To investigate the presence of voids in bulk fill flowable composites. METHODS: This study investigated two well-known bulk-fill flowable composites, Smart Dentin Replacement (SDR) (Dentsply/Caulk, Milford, ...
    • Phases of dipolar bosons in a bilayer geometry 

      Cinti, Fabio; Wang, Daw-Wei; Boninsegni, Massimo (American Physical Society, 2017)
      We study, by first-principles computer simulations, the low-temperature phase diagram of bosonic dipolar gases in a bilayer geometry as a function of the two control parameters, i.e., the in-plane density and the ...
    • Nuclear matter properties with nucleon-nucleon forces up to fifth order in the chiral expansion 

      Hu, Jinniu; Zhang, Ying; Epelbaum, Evgeny; Meibner, Ulf G. (American Physical Society, 2017)
      The properties of nuclear matter are studied using state-of-the-art nucleon-nucleon forces up to fifth order in chiral effective field theory. The equations of state of symmetric nuclear matter and pure neutron matter are ...
    • Nuclear matrix element of neutrinoless double-β decay : relativity and short-range correlations 

      Song, L. S.; Yao, J. M.; Ring, P.; Meng, J. (American Physical Society, 2017)
      Background:The discovery of neutrinoless double-β (0νββ) decay would demonstrate the nature of neutrinos, have profound implications for our understanding of matter-antimatter mystery, and solve the mass hierarchy problem ...
    • Noninvasive measurement of dynamic correlation functions 

      Uhrich, Philipp; Castrignano, Salvatore; Uys, Hermann; Kastner, Michael (American Physical Society, 2017)
      The measurement of dynamic correlation functions of quantum systems is complicated by measurement backaction. To facilitate such measurements we introduce a protocol, based on weak ancilla-system couplings, that is ...
    • ¹³⁷,¹³⁸,¹³⁹La(n,γ) cross sections constrained with statistical decay properties of ¹³⁸,¹³⁹,¹⁴⁰La nuclei 

      Kheswa, B. V.; Wiedeking, M.; Brown, J. A.; Larsen, A. C.; Goriely, S.; Guttormsen, M.; Garrote, F. L. Bello; Bernstein, L. A.; Bleuel, D. L.; Eriksen, T. K.; Giacoppo, F.; Gorgen, A.; Goldblum, B. L.; Hagen, T. W.; Koehler, P. E.; Klintefjord, M.; Malatji, K. L.; Midtbo, J. E.; Nyhus, H. T.; Papka, P.; Renstrm, T.; Rose, S. J.; Sahin, E.; Siem, S.; Tornyi, T. G. (American Physical Society, 2017)
      The nuclear level densities and γ-ray strength functions of ¹³⁸,¹³⁹,¹⁴⁰La were measured using the ¹³⁹La(³He,α), ¹³⁹La(³He,'³He), and ¹³⁹La(d,p) reactions. The particle-γ coincidences were recorded with the silicon particle ...
    • Influence of pairing correlations on the radius of neutron-rich nuclei 

      Zhang, Ying; Chen, Ying; Meng, Jie; Ring, Peter (American Physical Society, 2017)
      The influence of pairing correlations on the neutron root mean square (rms) radius of nuclei is investigated in the framework of self-consistent Skyrme Hartree-Fock-Bogoliubov calculations. The continuum is treated ...
    • Influence of nuclear cluster structure in proton-induced pre-equilibrium composite particle emission 

      Cowley, A. A. (IOP Publishing, 2017)
      Recent statistical multistep analyses of the pre-equilibrium reaction⁹³Nb(p, α) at incident energies of 65 and 100 MeV are reviewed. It is shown that the α-cluster structure of the target nucleus is prominently displayed ...