NMR quantum simulation of localization effects induced by decoherence

Abstract

The loss of coherence in quantum mechanical superposition states limits the time for which quantum information remains useful. Similarly, it limits the distance over which quantum information can be transmitted, resembling Anderson localization, where disorder causes quantum mechanical states to become localized. Here, we investigate in a nuclear spin-based quantum simulator, the localization of the size of spin clusters that are generated by a Hamiltonian driving the transmission of information, while a variable-strength perturbation counteracts the spreading. We find that the system reaches a dynamic equilibrium size, which decreases with the square of the perturbation strength.

5 pages, 5 figures

References in corpus (5)

• Optimized Dynamical Decoupling in a Model Quantum Memory
• Dynamics and Control of a Quasi-1D Spin System
• Effective one-body dynamics in multiple-quantum NMR experiments
• Quantum communication beyond the localization length in disordered spin chains
• Quantum computation of the Anderson transition in presence of imperfections

Cited by in corpus (6)

• Optimal pulse spacing for dynamical decoupling in the presence of a purely-dephasing spin-bath
• Performance comparison of dynamical decoupling sequences for a qubit in a rapidly fluctuating spin-bath
• Zeno and anti-Zeno polarization control of spin-ensembles by induced dephasing
• Numerical analysis of relaxation times of multiple quantum coherences in the system with a large number of spins
• Decoherence as attenuation of mesoscopic echoes in a spin-chain channel
• Exact reduced dynamics for a qubit in a precessing magnetic field and in the contact with a heat-bath