#### Filter Results:

- Full text PDF available (27)

#### Publication Year

1971

2018

- This year (1)
- Last 5 years (12)
- Last 10 years (26)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

The Mallows measure on the symmetric group Sn is the probability measure such that each permutation has probability proportional to q raised to the power of the number of inversions, where q is a… (More)

The Mallows model on Sn is a probability distribution on permutations, q d(π,e) /Pn(q), where d(π, e) is the distance between π and the identity element, relative to the Coxeter generators.… (More)

We develop a novel approach to phase transitions in quantum spin models based on a relation to the corresponding classical spin systems. Explicitly, we show that whenever chessboard estimates can be… (More)

We consider the ground states of the ferromagnetic XXZ chain with spin up boundary conditions in sectors with a fixed number of down spins. This forces the existence of a droplet of down spins in the… (More)

We give a precise definition for excitations consisting of a droplet of size n in the XXZ chain with various choices of boundary conditions, including kink boundary conditions and prove that, for… (More)

NASA, at the John F. Kennedy Space Center (KSC), developed and operates a unique high precision lightning location system to provide lightning related weather warnings. These warnings are used to… (More)

We construct a W *-dynamical system describing the dynamics of a class of anharmonic quantum oscillator lattice systems in the thermodynamic limit. Our approach is based on recently proved… (More)

We investigate the spectrum above the kink ground states of the spin J ferromagnetic XXZ chain with Ising anisotropy A. Our main theorem is that there is a non-vanishing gap above all ground states… (More)