Now showing items 1-20 of 161

    • Adiabatic Preparation of Many-Body States in Optical Lattices 

      Sorensen, Anders; Altman, Ehud; Gullans, Michael John; Porto, J.; Lukin, Mikhail D.; Demler, Eugene A. (American Physical Society, 2010)
      We analyze a technique for the preparation of low-entropy many-body states of atoms in optical lattices based on adiabatic passage. In particular, we show that this method allows preparation of strongly correlated states ...
    • Anomalous Expansion of Attractively Interacting Fermionic Atoms in an Optical Lattice 

      Hackermuller, Lucia; Schneider, Ulrich; Moreno-Cardoner, Maria; Kitagawa, Takuya; Will, Sebastian; Best, Thorsten; Demler, Eugene A.; Altman, Ehud; Bloch, Immanuel; Paredes, Belen (American Association for the Advancement of Science, 2010)
      Strong correlations can dramatically modify the thermodynamics of a quantum many-particle system. Especially intriguing behaviour can appear when the system adiabatically enters a strongly correlated regime, for the interplay ...
    • Antiferromagnetic noise correlations in optical lattices 

      Bruun, G. M.; Syljuåsen, O. F.; Pedersen, Kine; Andersen, B. M.; Demler, Eugene A.; Sørensen, A. S. (American Physical Society (APS), 2009)
      We analyze how noise correlations probed by time-of-flight experiments reveal antiferromagnetic (AF) correlations of fermionic atoms in two-dimensional and three-dimensional optical lattices. Combining analytical and quantum ...
    • Anyonic Interferometry and Protected Memories in Atomic Spin Lattices 

      Jiang, Liang; Brennen, Gavin; Gorshkov, Alexey Vyacheslavovich; Hammerer, Klemens; Hafezi, Mohammad; Demler, Eugene A.; Luki, Mikhail; Zoller, Peter (Nature Publishing Group, 2008)
      Strongly correlated quantum systems can exhibit exotic behavior called topological order which is characterized by non-local correlations that depend on the system topology. Such systems can exhibit remarkable phenomena ...
    • Bilayer Coherent and Quantum Hall Phases: Duality and Quantum Disorder 

      Demler, Eugene A.; Nayak, Chetan; Das Sarma, S. (American Physical Society (APS), 2001)
      We consider a fully spin-polarized quantum Hall system with no interlayer tunneling at total filling factor n 3 1 k (where k is an odd integer) using the Chern-Simons-Ginzburg-Landau theory. Exploit- ing particle-vortex ...
    • Bilayer paired quantum Hall states and Coulomb drag 

      Kim, Yong Baek; Nayak, Chetan; Demler, Eugene A.; Read, N.; Das Sarma, S. (American Physical Society (APS), 2001)
      We consider a number of strongly correlated quantum Hall states that are likely to be realized in bilayer quantum Hall systems at total Landau level filling fraction T 1. One state, the (3,3, 1) state, can occur as an ...
    • Bilayer quantum Hall systems: spin–pseudospin symmetry breaking and quantum phase transitions 

      Das Sarma, Sankar; Demler, Eugene A. (Elsevier BV, 2001)
      We discuss and review recent advances in our understanding of quantum Hall systems where additional quantum numbers associated with spin and/or layer (pseudospin) indices play crucial roles in creating exotic quantum phases. ...
    • Bloch oscillations of bosonic lattice polarons 

      Grusdt, Fabian; Shashi, A.; Abanin, Dmitry; Demler, Eugene A. (American Physical Society (APS), 2014)
      We consider a single-impurity atom confined to an optical lattice and immersed in a homogeneous Bose-Einstein condensate (BEC). Interaction of the impurity with the phonon modes of the BEC leads to the formation of a stable ...
    • Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps 

      Imambekov, Adilet; Bolech, C. J.; Lukin, Mikhail D.; Demler, Eugene A. (American Physical Society (APS), 2006)
      We consider spin-polarized mixtures of cold fermionic atoms on the BEC side of the Feshbach resonance. We demonstrate that a strongly anisotropic confining potential can give rise to a double-peak structure in the axial ...
    • Characterization of Topological States on a Lattice with Chern Number 

      Hafezi, Mohammad; Sørensen, Anders; Lukin, Mikhail D.; Demler, Eugene A. (Institute of Physics, 2008)
      We study Chern numbers to characterize the ground state of strongly interacting systems on a lattice. This method allows us to perform a numerical characterization of bosonic fractional quantum Hall (FQH) states on a lattice ...
    • Chiral Prethermalization in Supersonically Split Condensates 

      Agarwal, Kartiek; Torre, Emanuele G. Dalla; Rauer, Bernhard; Langen, Tim; Schmiedmayer, Jörg; Demler, Eugene A. (American Physical Society (APS), 2014)
      We study the dynamics of phase relaxation between a pair of one-dimensional condensates created by a supersonic unzipping of a single condensate. We use the Lorentz invariance of the low energy sector of such systems to ...
    • Classifying Novel Phases of Spinor Atoms 

      Barnett, Ryan; Turner, Ari; Demler, Eugene A. (American Physical Society (APS), 2006)
      We consider many-body states of bosonic spinor atoms which, at the mean-field level, can be characterized by a single-particle wave function for the Bose-Einstein condensation and Mott insulating states. We describe and ...
    • Classifying vortices in S = 3 Bose-Einstein condensates 

      Barnett, Ryan; Turner, Ari; Demler, Eugene A. (American Physical Society (APS), 2007)
      Motivated by the recent realization of a 52Cr Bose-Einstein condensate, we consider the phase diagram of a general spin-three condensate as a function of its scattering lengths. We classify each phase according to its ...
    • Coexistence of Gapless Excitations and Commensurate Charge-Density Wave in the 2H Transition Metal Dichalcogenides 

      Barnett, Ryan L.; Polkovnikov, Anatoli; Demler, Eugene A.; Yin, Wei-Guo; Ku, Wei (American Physical Society (APS), 2006)
      An unexpected feature common to 2H transition metal dichalcogenides (2H TMDs) is revealed with a first-principles Wannier function analysis of the electronic structure of the prototype 2H TaSe2: The lowenergy Ta ‘‘5dz2 ’’ ...
    • Collective Phenomena in Quasi-Two-Dimensional Fermionic Polar Molecules: Band Renormalization and Excitons 

      Babadi, Mehrtash; Demler, Eugene A. (American Physical Society, 2011)
      We theoretically analyze a quasi-two-dimensional system of fermionic polar molecules in a harmonic transverse confining potential. The renormalized energy bands are calculated by solving the Hartree-Fock equation numerically ...
    • Competing orders in a magnetic field: Spin and charge order in the cuprate superconductors 

      Zhang, Ying; Demler, Eugene A.; Sachdev, Subir (American Physical Society (APS), 2002)
      We describe two-dimensional quantum spin fluctuations in a superconducting Abrikosov flux lattice induced by a magnetic field applied to a doped Mott insulator. Complete numerical solutions of a self-consistent large- N ...
    • Competing orders in thermally fluctuating superconductors in two dimensions 

      Sachdev, Subir; Demler, Eugene A. (American Physical Society (APS), 2004)
      We extend recent low-temperature analyses of competing orders in the cuprate superconductors to the pseudogap regime where all orders are fluctuating. A universal continuum limit of a classical Ginzburg-Landau functional ...
    • Competition Between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases Near Feshbach Resonances 

      Pekker, David; Babadi, Mehrtash; Sensarma, Rajdeep; Zinner, Nikolaj; Pollet, Lode; Zwierlein, Martin; Demler, Eugene A. (American Physical Society, 2011)
      We study the quench dynamics of a two-component ultracold Fermi gas from the weak into the strong interaction regime, where the short time dynamics are governed by the exponential growth rate of unstable collective modes. ...
    • Competition between triplet superconductivity and antiferromagnetism in quasi-one-dimensional electron systems 

      Podolsky, Daniel; Altman, Ehud; Rostunov, Timofey; Demler, Eugene A. (American Physical Society (APS), 2004)
      We investigate the competition between antiferromagnetism and triplet superconductivity in quasi-one-dimensional electron systems. We show that the two order parameters can be unified using a SO(4) symmetry and demonstrate ...