Browsing by Author "Berg, Erez"

Now showing items 1-8 of 8

    • Correlated Phases of Bosons in Tilted Frustrated Lattices 

      Pielawa, Susanne; Kitagawa, Takuya; Berg, Erez; Sachdev, Subir (American Physical Society, 2011)
      We study the "tilting" of Mott insulators of bosons into metastable states. These are described by Hamiltonians acting on resonant subspaces, and have rich possibilities for correlated phases with non-trivial entanglement ...

    • Exploring Topological Phases With Quantum Walks 

      Kitagawa, Takuya; Rudner, Mark; Berg, Erez; Demler, Eugene A. (American Physical Society, 2010)
      The quantum walk was originally proposed as a quantum mechanical analogue of the classical random walk, and has since become a powerful tool in quantum information science. In this paper, we show that discrete time quantum ...

    • Nematic Order in the Vicinity of a Vortex in Superconducting FeSe 

      Chowdhury, Debanjan; Berg, Erez; Sachdev, Subir (American Physical Society, 2011)
      We present a phenomenological theory of the interplay between nematic order and superconductivity in the vicinity of a vortex induced by an applied magnetic field. Nematic order can be strongly enhanced in the vortex core. ...

    • Observation of Topologically Protected Bound States in Photonic Quantum Walks 

      Kitagawa, Takuya; Broome, Matthew A.; Fedrizzi, Alessandro; Rudner, Mark S.; Berg, Erez; Kassal, Ivan; Aspuru-Guzik, Alan; Demler, Eugene A.; White, Andrew G. (Nature Publishing Group, 2012)
      Topological phases exhibit some of the most striking phenomena in modern physics. Much of the rich behaviour of quantum Hall systems, topological insulators, and topological superconductors can be traced to the existence ...

    • Singularity of the London Penetration Depth at Quantum Critical Points in Superconductors 

      Chowdhury, Debanjan; Swingle, Brian; Berg, Erez; Sachdev, Subir (American Physical Society (APS), 2013)
      We present a general theory of the singularity in the London penetration depth at symmetry-breaking and topological quantum critical points within a superconducting phase. While the critical exponents and ratios of amplitudes ...

    • Spin density wave order, topological order, and Fermi surface reconstruction 

      Sachdev, Subir; Berg, Erez; Chatterjee, Shubhayu; Schattner, Yoni (American Physical Society (APS), 2016)
      In the conventional theory of density wave ordering in metals, the onset of spin density wave (SDW) order coincides with the reconstruction of the Fermi surfaces into small “pockets.” We present models which display this ...

    • Superfluidity and Dimerization in a Multilayered System of Fermionic Polar Molecules 

      Potter, Andrew; Berg, Erez; Wang, Daw-Wei; Halperin, Bertrand I.; Demler, Eugene A. (American Physical Society, 2010)
      We consider a layered system of fermionic molecules with permanent dipole moments aligned by an external field. The dipole interactions between fermions in adjacent layers are attractive and induce inter-layer pairing. Due ...

    • Topological Characterization of Periodically-Driven Quantum Systems 

      Kitagawa, Takuya; Berg, Erez; Rudner, Mark; Demler, Eugene A. (American Physical Society, 2010)
      Topological properties of physical systems can lead to robust behaviors that are insensitive to microscopic details. Such topologically robust phenomena are not limited to static systems but can also appear in driven quantum ...