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19922026
Showing 1998Show all

88 papers · 1 filter

cond-mat.dis-nn1998★ 102 cited

Effect of disorder on quantum phase transitions in anisotropic XY spin chains in a transverse field

J. E. Bunder, Ross H. McKenzie

We present some exact results for the effect of disorder on the critical properties of an anisotropic XY spin chain in a transverse field. The continuum limit of the corresponding…

nucl-th1998★ 39 cited

Quantum Münchhausen effect in tunneling

V. V. Flambaum, V. G. Zelevinsky

It is demonstrated that radiative corrections increase tunneling probability of a charged particle.

cond-mat.stat-mech1998★ 70 cited

Excited Eigenstates and Strength Functions for Isolated Systems of Interacting Particles

V. V. Flambaum, F. M. Izrailev

Eigenstates in finite systems such as nuclei, atoms, atomic clusters and quantum dots with few excited particles are chaotic superpositions of shell model basis states. We study cr…

cond-mat.str-el1998

Destabilization of the 2D conducting phase by an in-plane magnetic field

J. S. Thakur, D. Neilson

We propose a mechanism for the recently reported destabilization by an in-plane magnetic field of the conducting phase of low density electrons in 2D. We apply our self-consistent…

cond-mat1998★ 31 cited

A density matrix renormalisation group algorithm for quantum lattice systems with a large number of states per site

R. J. Bursill

A variant of White's density matrix renormalisation group scheme which is designed to compute low-lying energies of one-dimensional quantum lattice models with a large number of de…

cond-mat.str-el1998★ 21 cited

Dynamical Transition from Triplets to Spinon Excitations: A Series Expansion Study of the spin-half chain

Rajiv R. P Singh, Zheng Weihong

We study the spin-half Heisenberg chain with alternating nearest neighbor interactions and and a uniform second neighbor interaction by series e…