Quantum phase transitions in alternating transverse Ising chains: Analytical and numerical results
Quantum phase transitions in alternating transverse Ising chains: Analytical and numerical results
We examine the ground state properties of the $s=\frac{1}{2}$ transverse Ising chain with regularly alternating bonds and fields, using exact analytical results and exact numerical data for long (up to $N=900)$ and short $(N=20)$ chains. For a given period of alternation the system may exhibit a series of quantum phase …