Dependence on state preparation of noise induced effects in multiqubit systems

TL;DR

This paper studies how initial state preparation influences noise-induced effects such as decoherence and noise-shielding in multiqubit systems, revealing dependence on initial geometry, placement of noise, and temperature effects.

Contribution

It demonstrates the dependence of noise-induced effects on initial state geometry and noise placement in multiqubit systems, including temperature's constructive role.

Findings

Effects depend on initial state geometry and noise placement.

Temperature can enhance noise-shielding effects.

Results consistent across 2, 3, and 4-qubit chains.

Abstract

The perturbation of multiqubit systems by an external noise can induce various effects like decoherence, stochastic resonance and anti-resonance, and noise-shielding. We investigate how the appearance of these effects on disentanglement time depends on the initial preparation of the systems. We present results for 2, 3 and 4-qubit chains in various arrangements and observe a clear dependence on the combination of initial geometry of the state space and the placement of noise. Finally, we see that temperature can play a constructive role for the control of these noise induced effects.