Robust Quantum Entanglement Generation and Generation-plus-Storage Protocols with Spin Chains

Abstract

Reliable quantum communication/processing links between modules are a necessary building block for various quantum processing architectures. Here we consider a spin chain system with alternating strength couplings and containing three defects, that impose three domain walls between topologically distinct regions of the chain. We show that -- in addition to its useful, high fidelity, quantum state transfer properties -- an entangling protocol can be implemented in this system, with optional localisation and storage of the entangled states. We demonstrate both numerically and analytically that, given a suitable initial product-state injection, the natural dynamics of the system produces a maximally entangled state at a given time. We present detailed investigations of the effects of fabrication errors, analyzing random static disorder both in the diagonal and off-diagonal terms of the system Hamiltonian. Our results show that the entangled state formation is very robust against perturbations of up to $\sim 10\%$ the weaker chain coupling, and also robust against timing injection errors. We propose a further protocol which manipulates the chain in order to localise and store each of the entangled qubits. The engineering of a system with such characteristics would thus provide a useful device for quantum information processing tasks involving the creation and storage of entangled resources.

7 pages, 6 figures

References in corpus (13)

• Experimental quantum teleportation
• Unconditional quantum teleportation between distant solid-state qubits
• Perfect Transfer of Arbitrary States in Quantum Spin Networks
• Observation of the topological soliton state in the Su-Schrieffer-Heeger model
• Quantum Communication through Spin Chain Dynamics: an Introductory Overview
• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• Electron wavepacket propagation and entanglement in a chain of coupled quantum dots
• Non-Perturbative Entangling Gates between Distant Qubits using Uniform Cold Atom Chains
• Topologically protected localised states in spin chains
• Minimally complex ion traps as modules for quantum communication and computing
• Peierls distorted chain as a quantum data bus for quantum state transfer
• Modular Entanglement
• Graph state generation with noisy mirror-inverting spin chains

Cited by in corpus (34)

• Robust multipartite entanglement generation via a collision model
• Spin chains for two-qubit teleportation
• Disorder-assisted distribution of entanglement in $XY$ spin chains
• High-fidelity state transfer through long-range correlated disordered quantum channels
• 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
• Parallel entangling gate operations and two-way quantum communication in spin chains
• Evolutionary computation for adaptive quantum device design
• Disorder-safe entanglement transfer through ladder qubit chains
• Entanglement generation between distant parties via disordered spin chains
• Almost perfect transmission of multipartite entanglement through disordered and noisy spin chains
• Photon-assisted quantum state transfer and entanglement generation in spin chains
• Localization properties and high-fidelity state transfer in electronic hopping models with correlated disorder
• Arbitrary length XX spin chains boundary-driven by non-Markovian environments
• Robust and efficient transport of two-qubit entanglement via disordered spin chains
• Fast generation of entanglement between coupled spins using optimization and deep learning methods
• Continuous dynamical decoupling of spin chains: modulating the spin-environment and spin-spin interactions
• Flat-band quantum communication induced by disorder
• Entanglement transfer via Chiral Quantum Walk on a Triangular Chain
• Ergotopy transport in a one dimensional spin chain
• Unitary Design of Quantum Spin Networks for Robust Routing, Entanglement Generation, and Phase Sensing
• Quantum Corralling
• Quasi-Perfect State Transfer in Spin Chains via Parametrization of On-Site Energies
• Exploring the limits of the generation of non-classical states of spins coupled to a cavity by optimal control
• Topological Thouless pumping in arrays of coupled spin chains
• Rapid and Robust generation of Einstein--Podolsky--Rosen pairs with Spin Chains
• Properties of quantum stochastic walks from the asymptotic scaling exponent
• Generation and Robustness of Quantum Entanglement in Spin Graphs
• Non-Markovianity in the time evolution of open quantum systems assessed by means of quantum state distance
• Generating Symmetry-Protected Long-Range Entanglement in Many-Body Systems
• Comparison of entangling protocols in ABC-type spin chains
• Scalable Quantum Spin Networks from Unitary Construction
• Fast and efficient long-distance quantum state transfer in long-range spin-$\frac{1}{2}$ models
• Comparative analysis of robust entanglement generation in engineered XX spin chains