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  1. No Access

    Article

    Magnetic properties of commensurate Bose-Bose mixtures in one-dimensional optical lattices

    We investigate magnetic properties of strongly interacting bosonic mixtures confined in one dimensional geometries, focusing on recently realized 87Rb-41K gases with tunable interspecies interactions. By combinin...

    M. Dalmonte, E. Ercolessi, M. Mattioli… in The European Physical Journal Special Topi… (2013)

  2. No Access

    Article

    From the equations of motion to the canonical commutation relations

    The problem of whether or not the equations of motion of a quantum system determine the commutation relations was posed by E. P. Wigner in 1950. A similar problem (known as “The Inverse Problem in the Calculus of...

    E. Ercolessi, G. Marmo, G. Morandi in La Rivista del Nuovo Cimento (2010)

  3. No Access

    Article

    Ray space ‘Riccati’ evolution and geometric phases for N-level quantum systems

    We present a simple derivation of the matrix Riccati equations governing the reduced dynamics as one descends from the group $$ \mathb...

    S. Chaturvedi, E. Ercolessi, G. Marmo, G. Morandi, N. Mukunda, R. Simon in Pramana (2007)

  4. No Access

    Article

    Stable particles in anisotropic spin-1 chains

    Motivated by field-theoretic predictions we investigate the stable excitations that exist in two characteristic gapped phases of a spin-1 model with Ising-like and single-ion anisotropies. The sine-Gordon the...

    L. Campos Venuti, C. Degli Esposti Boschi… in The European Physical Journal B - Condense… (2006)

  5. No Access

    Article

    Wigner distributions for finite dimensional quantum systems: An algebraic approach

    We discuss questions pertaining to the definition of ‘momentum’, ‘momentum space’, ‘phase space’ and ‘Wigner distributions’; for finite dimensional quantum systems. For such systems, where traditional concepts...

    S. Chaturvedi, E. Ercolessi, G. Marmo, G. Morandi, N. Mukunda, R. Simon in Pramana (2005)

  6. No Access

    Chapter and Conference Paper

    Low-Dimensional Spin Systems: Hidden Symmetries, Conformal Field Theories and Numerical Checks

    We review here some general properties of antiferromagnetic Heisenberg spin chains, emphasizing and discussing the rôle of hidden symmetries in the classification of the various phases of the models. We presen...

    C. Degli Esposti Boschi, E. Ercolessi, G. Morandi in Symmetries in Science XI (2005)

  7. No Access

    Article

    On \(\mathsf{c = 1}\) critical phases in anisotropic spin-1 chains

    Quantum spin-1 chains may develop massless phases in presence of Ising-like and single-ion anisotropies. We have studied c = 1 critical phases by means of both analytical techniques, including a map** of the la...

    C. Degli Esposti Boschi, E. Ercolessi… in The European Physical Journal B - Condense… (2003)

  8. No Access

    Article

    Multiparticle continuum in the excitation spectrum of the compound CsNiCl

    Recent neutron scattering experiments on CsNiCl3 reveal some features that are not well described by the standard nonlinear σ model, nor by numerical simulations, for isolated S = 1 spin chains. In particular, i...

    E. Ercolessi, G. Morandi, M. Roncaglia in The European Physical Journal B - Condense… (2003)