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Author During, G.; Josserand, C.; Rica, S. pdf  doi
openurl 
  Title Self-similar formation of an inverse cascade in vibrating elastic plates Type Journal Article
  Year 2015 Publication Physical Review E Abbreviated Journal Phys. Rev. E  
  Volume 91 Issue 5 Pages 10 pp  
  Keywords  
  Abstract The dynamics of random weakly nonlinear waves is studied in the framework of vibrating thin elastic plates. Although it has been previously predicted that no stationary inverse cascade of constant wave action flux could exist in the framework of wave turbulence for elastic plates, we present substantial evidence of the existence of a time-dependent inverse cascade, opening up the possibility of self-organization for a larger class of systems. This inverse cascade transports the spectral density of the amplitude of the waves from short up to large scales, increasing the distribution of long waves despite the short-wave fluctuations. This dynamics appears to be self-similar and possesses a power-law behavior in the short-wavelength limit which significantly differs from the exponent obtained via a Kolmogorov dimensional analysis argument. Finally, we show explicitly a tendency to build a long-wave coherent structure in finite time.  
  Address [Duering, Gustavo] Pontificia Univ Catolica Chile, Fac Fis, Santiago, Chile  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2470-0045 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000354983600007 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 493  
Permanent link to this record
 

 
Author Hojman, S.A.; Asenjo, F.A. pdf  doi
openurl 
  Title Supersymmetric Majorana quantum cosmologies Type Journal Article
  Year 2015 Publication Physical Review D Abbreviated Journal Phys. Rev. D  
  Volume 92 Issue 8 Pages 7 pp  
  Keywords  
  Abstract The Einstein equations for an isotropic and homogeneous Friedmann-Robertson-Walker universe in the presence of a quintessence scalar field are shown to be described in a compact way, formally identical to the dynamics of a relativistic particle moving on a two-dimensional spacetime. The correct Lagrangian for the system is presented and used to construct a spinor quantum cosmology theory using Breit's prescription. The theory is supersymmetric when written in the Majorana representation. The spinor field components interact through a potential that correlates the spacetime metric and the quintessence. An exact supersymmetric solution for k = 0 case is exhibited. This quantum cosmology model may be interpreted as a theory of interacting universes.  
  Address [Hojman, Sergio A.] Univ Adolfo Ibanez, Dept Ciencias, Fac Artes Liberales, Santiago 7941169, Chile, Email: sergio.hojman@uai.cl;  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2470-0010 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000362901900005 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 544  
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Author Ljubic, I.; Moreno, E. doi  openurl
  Title Outer approximation and submodular cuts for maximum capture facility location problems with random utilities Type Journal Article
  Year 2017 Publication European Journal Of Operational Research Abbreviated Journal Eur. J. Oper. Res.  
  Volume to appear Issue Pages  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0377-2217 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 762  
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Author Mellado, P.; Petrova, O.; Tchernyshyov, O. pdf  doi
openurl 
  Title Projective symmetry of partons in the Kitaev honeycomb model Type Journal Article
  Year 2015 Publication Physical Review B Abbreviated Journal Phys. Rev. B  
  Volume 91 Issue 4 Pages 4 pp  
  Keywords  
  Abstract Low-energy states of quantum spin liquids are thought to involve partons living in a gauge-field background. We study the spectrum of Majorana fermions of the Kitaev honeycomb model on spherical clusters. The gauge field endows the partons with half-integer orbital angular momenta. As a consequence, the multiplicities do not reflect the point-group symmetries of the cluster, but rather its projective symmetries, operations combining physical and gauge transformations. The projective symmetry group of the ground state is the double cover of the point group.  
  Address [Mellado, Paula] Adolfo Ibanez Univ, Sch Engn & Appl Sci, Santiago, Chile  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2469-9950 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000348568700001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 446  
Permanent link to this record
 

 
Author Muñoz, G.; Espinoza, D.; Goycoolea, M.; Moreno, E.; Queyranne, M.; Rivera, O. doi  openurl
  Title A study of the Bienstock-Zuckerberg algorithm, Applications in Mining and Resource Constrained Project Scheduling Type Journal Article
  Year 2017 Publication Computational Optimization And Applications Abbreviated Journal Comput. Optim. Appl.  
  Volume to appear Issue Pages  
  Keywords  
  Abstract We study a Lagrangian decomposition algorithm recently proposed by Dan Bienstock and Mark Zuckerberg for solving the LP relaxation of a class of open pit mine project scheduling problems. In this study we show that the Bienstock-Zuckerberg (BZ) algorithm can be used to solve LP relaxations corresponding to a much broader class of scheduling problems, including the well-known Resource Constrained Project Scheduling Problem (RCPSP), and multi-modal variants of the RCPSP that consider batch processing of jobs. We present a new, intuitive proof of correctness for the BZ algorithm that works by casting the BZ algorithm as a column generation algorithm. This analysis allows us to draw parallels with the well-known Dantzig-Wolfe (DW) algorithm. We discuss practical computational techniques for speeding up the performance of the BZ and DW algorithms on project scheduling problems. Finally, we present computational experiments independently testing the effectiveness of the BZ and DW algorithms on different sets of publicly available test instances. Our computational experiments confirm that the BZ algorithm significantly outperforms the DW algorithm for the problems considered. Our computational experiments also show that the proposed speed-up techniques can have a significant impact on solution time. We provide some insights on what might be explaining this significant difference in performance.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0926-6003 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 763  
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Author Petrova, O.; Mellado, P.; Tchernyshyov, O. pdf  doi
openurl 
  Title Unpaired Majorana modes in the gapped phase of Kitaev's honeycomb model Type Journal Article
  Year 2013 Publication Physical Review B Abbreviated Journal Phys. Rev. B  
  Volume 88 Issue 14 Pages 4 pp  
  Keywords  
  Abstract We study the gapped phase of Kitaev's honeycomb model (a Z(2) spin liquid) in the presence of lattice defects. We find that some dislocations and bond defects carry unpaired Majorana fermions. Physical excitations associated with these defects are (complex) fermion modes made out of two (real) Majorana fermions connected by a Z(2) gauge string. The quantum state of these modes is robust against local noise and can be changed by winding a Z(2) vortex around a dislocation. The exact solution respects gauge invariance and reveals a crucial role of the gauge field in the physics of Majorana modes.  
  Address [Petrova, Olga; Tchernyshyov, Oleg] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2469-9950 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000325556900001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 317  
Permanent link to this record
 

 
Author Petrova, O.; Mellado, P.; Tchernyshyov, O. pdf  doi
openurl 
  Title Unpaired Majorana modes on dislocations and string defects in Kitaev's honeycomb model Type Journal Article
  Year 2014 Publication Physical Review B Abbreviated Journal Phys. Rev. B  
  Volume 90 Issue 13 Pages 14 pp  
  Keywords  
  Abstract We study the gapped phase of Kitaev's honeycomb model (a Z(2) spin liquid) on a lattice with topological defects. We find that some dislocations and string defects carry unpaired Majorana fermions. Physical excitations associated with these defects are (complex) fermion modes made out of two (real) Majorana fermions connected by a Z(2) gauge string. The quantum state of these modes is robust against local noise and can be changed by winding a Z(2) vortex around one of the dislocations. The exact solution respects gauge invariance and reveals a crucial role of the gauge field in the physics of Majorana modes. To facilitate these theoretical developments, we recast the degenerate perturbation theory for spins in the language of Majorana fermions.  
  Address [Petrova, Olga] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2469-9950 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000342794300003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 417  
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