Quantum state transfer in ladder systems with cross-correlated disorder

Abstract

We explore a disordered ladder system as a potential platform for the transmission of a single qubit. The quantum channel consists of two coupled one-dimensional chains, with homogeneous intra- and interchain hoppings. We introduce diagonal cross-correlated disorder into the ladder by assigning opposite binary distributions across each leg. By adding two sites, one at each end of the ladder, we explore the conditions under which high-fidelity quantum state transfer can occur. A finite-size analysis shows that the cross-correlation is capable of maintaining good transfer fidelities even amid the presence of moderate disorder. Our findings contribute to the design of quasi-1D quantum channels prone to static parameter fluctuations for quantum communication devices.