Is spin-charge separation observable in a transport experiment?

TL;DR

This study demonstrates that spin-charge separation can be observed in a one-dimensional transport experiment by using real-time DMRG simulations with explicitly created excitations, enabling clear detection through time-resolved measurements.

Contribution

The paper introduces a novel transport setup with explicit excitation creation, allowing direct observation of spin-charge separation in a one-dimensional system.

Findings

Spin-charge separation can be detected via time-resolved spin-polarized density measurements.

Explicit creation of left-moving single-particle excitations improves detection clarity.

Transport setup enables observation of spin-charge separation in a controlled simulation environment.

Abstract

We consider a one-dimensional chain consisting of an interacting area coupled to non-interacting leads. Within the area, interaction is mediated by a local on-site repulsion. Using real time evolution within the Density Matrix Renormalisation Group (DMRG) scheme, we study the dynamics of wave packets in this two-terminal transport setup. In contrast to previous works, where excitations were created by adding potentials to the Hamiltonian, we explicitly create left moving single particle excitations in the right lead as the starting condition. Our simulations show that such a transport setup allows for a clear detection of spin-charge separation using time-resolved spin-polarised density measurements.