We present time-dependent density matrix renormalization group simulations (t-DMRG) at
finite temperatures. It is demonstrated how a combination of finite-temperature t-DMRG and …

We present asymptotically exact results for the real time order parameter correlations of a
class of d= 1 Ising models in a transverse field at low temperatures (T) on both sides of the …

We give rigorous analytical results on the temporal behavior of two-point correlation
functions—also known as dynamical response functions or Green's functions—in closed …

We study the critical and off-critical (Griffiths-McCoy) regions of the random transverse-field
Ising spin chain by analytical and numerical methods and by phenomenological scaling …

A previously introduced real-space renormalization-group treatment of the random
transverse-field Ising spin chain is extended to provide detailed information on the …

We study a correlation function for the one-dimensional isotropic XY model (XX 0 model),
which is called the Emptiness Formation Probability (EFP). It is the probability of the …

For the simulation of equilibrium states and finite-temperature response functions of strongly
correlated quantum many-body systems, we compare the efficiencies of two different …

In this paper we show how an infinite system of coupled Toda-type nonlinear differential
equations derived by one of us can be used efficiently to calculate the time-dependent pair …

By the hydrodynamic linear response theory, dynamical correlation functions decay as
power laws along certain velocities, determined by the flux Jacobian. Such correlations are …

We probe the magnetic field-induced Tomonaga-Luttinger liquid (TLL) state in the bond-
alternating spin-1/2 antiferromagnetic (AFM) chain compound NaVOPO 4 using …