High-fidelity state transfer through long-range correlated disordered quantum channels

Abstract

We study quantum-state transfer in $XX$ spin-$1/2$ chains where both communicating spins are weakly coupled to a channel featuring disordered on-site magnetic fields. Fluctuations are modelled by long-range correlated sequences with self-similar profile obeying a power-law spectrum. We show that the channel is able to perform an almost perfect quantum-state transfer in most of the samples even in the presence of significant amounts of disorder provided the degree of those correlations is strong enough. In that case, we also show that the lack of mirror symmetry does not affect much the likelihood of having high-quality outcomes. Our results advance a further step in designing robust devices for quantum communication protocols.

8 pages, 5 figures

References in corpus (21)

• The Propagation of Quantum Information Through a Spin System
• Perfect quantum state transfer with randomly coupled quantum chains
• Long-distance entanglement and quantum teleportation in XX spin chains
• Quantum state transmission via a spin ladder as a robust data bus
• Perfect state transfer in long-range interacting spin chains
• From perfect to fractal transmission in spin chains
• 99%-fidelity ballistic quantum-state transfer through long uniform channels
• Entanglement dynamics in chains of qubits with noise and disorder
• Transfer of arbitrary two qubit states via a spin chain
• Topologically protected localised states in spin chains
• Robust Quantum Entanglement Generation and Generation-plus-Storage Protocols with Spin Chains
• Local control of entanglement in a spin chain
• Long-distance entanglement and quantum teleportation in coupled cavity arrays
• Perfect quantum state transfer with spinor bosons on weighted graphs
• Peierls distorted chain as a quantum data bus for quantum state transfer
• Engineering correlation and entanglement dynamics in spin systems
• Modular Entanglement
• Disorder-assisted distribution of entanglement in $XY$ spin chains
• Quantum communication through anisotropic Heisenberg XY spin chains
• Staggered magnetization and entanglement enhancement by magnetic impurities in $S=1/2$ spin chain
• Transport through quasi-one-dimensional wires with correlated disorder

Cited by in corpus (12)

• Dimensionality-enhanced quantum state transfer in long-range interacting spin systems
• Interplay between speed and fidelity in off-resonant quantum-state transfer protocols
• Almost perfect transport of an entangled two-qubit state through a spin chain
• Quantum transfer of interacting qubits
• Disorder-safe entanglement transfer through ladder qubit chains
• Almost perfect transmission of multipartite entanglement through disordered and noisy spin chains
• Robust and efficient transport of two-qubit entanglement via disordered spin chains
• Flat-band quantum communication induced by disorder
• Quantum Corralling
• M-neighbor approximation in one-qubit state transfer along zigzag and alternating spin-1/2 chains
• Two-excitation routing via linear quantum channels
• Quantum state transfer using 1D Heisenberg Hamiltonian on quasi-1D lattices