# One-dimensional quantum many body systems with long-range interactions

## TL;DR

This paper reviews how algebraically decaying long-range interactions influence the critical, topological, and dynamical properties of quantum many-body systems, highlighting recent advances in long-range Kitaev chains.

## Contribution

It summarizes decades of research on long-range classical and quantum Ising chains and presents recent findings on the integrable long-range Kitaev chain's topological phases and dynamics.

## Key findings

- Long-range interactions significantly affect phase transitions and topological properties.
- Recent studies reveal unique out-of-equilibrium behaviors in long-range Kitaev chains.
- Long-range superconducting pairing determines the topological phase diagram.

## Abstract

The presence of algebraically decaying long-range interactions may alter the critical as well as topological behaviour of a quantum many-body systems. However, when the interaction decays at a faster rate, the short-range behaviour is expected to be retrieved. Similarly, the long-range nature of interactions has a prominent signature on the out of equilibrium dynamics of these systems, e.g, in the growth of the entanglement entropy following a quench, the propagation of mutual information and non-equilibrium phase transitions. In this review, we summarize the results of long-range interacting classical and quantum Ising chains which have been studied since decades. Thereafter, we focus on the recent developments on the integrable long-range Kitaev chain emphasising the role of long-range superconducting pairing term on determining its topological phase diagram and out of equilibrium dynamics.