Now showing items 1-10 of 319
Operator-based truncation scheme based on the many-body fermion density matrix
In an earlier work [S. A. Cheong and C. L. Henley, preceding paper], we derived an exact formula for the many-body density matrix ρ B of a block of B sites cut out from an infinite chain of noninteracting spinless fermions, ...
Many-body density matrices on a two-dimensional square lattice : noninteracting and strongly interacting spinless fermions
The reduced density matrix of an interacting system can be used as the basis for a truncation scheme, or in an unbiased method to discover the strongest kind of correlation in the ground state. In this paper, we investigate ...
Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60
Two new selenacrown ethers, i.e., N,N'-dimethyl-1,11-diaza-4,8,14,18,-tetraselenacycloicosane (1) and 7,11- ...
Self-trapping of polarons with off-diagonal coupling
A variational polaron wave function pioneered by Toyozawa is utilized to elucidate exciton-phonon correlations in a generalized Holstein Hamiltonian in the simultaneous presence of diagonal and off-diagonal exciton-phonon ...
Synthesis of bridged and metallobridged bis(β-cyclodextrin)s containing fluorescent oxamidobisbenzoyl linkers and their selective binding towards bile salts
A series of β-cyclodextrin (β-CD) dimers containing fluorescent 2,2’-xamidobisbenzoyl and 4,4’oxamidobisbenzoyl linkers—that is, 6,6’-[2,2’-oxamidobis(benzoylamino)]ethyleneamino- 6,6’-deoxy-bis(β-CD) (2), 6,6’-[2,2’- ...
Convergence rate analysis of an asynchronous space decomposition method for convex minimization
We analyze the convergence rate of an asynchronous space decomposition method for constrained convex minimization in a reflexive Banach space. This method includes as special cases parallel domain decomposition methods and ...
Superconvergence for the gradient of finite element approximations by L2-projections
A gradient recovery technique is proposed and analyzed for finite element solutions which provides new gradient approximations with high order of accuracy. The recovery technique is based on the method of least-squares ...
Bidirectional branch and bound for controlled variable selection Part I : principles and minimum singular value criterion
The minimum singular value (MSV) rule is a useful tool for selecting controlled variables (CVs) from the available measurements. However, the application of the MSV rule to large-scale problems is difficult, as all feasible ...
Comparison of plant-wide oscillation detection methods
Plant-wide oscillations are common in many industrial processes. During the past few years, various methods have been proposed for the detection of plant-wide oscillations, including methods based on the autocorrelation ...
Primes in quadratic progressions on average
In this paper, we establish a theorem on the distribution of primes in quadratic progressions on average.