Heisenberg Spin Bus as a Robust Transmission Line for Perfect State Transfer

Abstract

We study the protocol known as quantum state transfer for a strongly coupled antiferromagnetic spin chain or ring (acting as a spin bus), with weakly coupled external qubits. By treating the weak coupling as a perturbation, we find that perfect state transfer (PST) is possible when second order terms are included in the expansion. We also show that PST is robust against variations in the couplings along the spin bus and between the bus and the qubits. As evidence of the quantum interference which mediates PST, we show that the optimal time for PST can be smaller with larger qubit separations, for an even-size chain or ring.

6 figures,submitted

References in corpus (12)

• Quantum Communication through Spin Chain Dynamics: an Introductory Overview
• Robust Quantum State Transfer in Random Unpolarized Spin Chains
• Qubit Teleportation and Transfer across Antiferromagnetic Spin Chains
• Non-Perturbative Entangling Gates between Distant Qubits using Uniform Cold Atom Chains
• Simulations of Information Transport in Spin Chains
• Efficient multiqubit entanglement via a spin-bus
• Perfect Quantum Routing in Regular Spin Networks
• Even-Odd Effects of Heisenberg Chains on Long-range Interaction and Entanglement
• Entanglement Enhanced Information Transfer through Strongly Correlated Systems and its Application to Optical Lattices
• Quantum communication through anisotropic Heisenberg XY spin chains
• Controllable anisotropic exchange coupling between spin qubits in quantum dots
• Exact ground states for coupled spin trimers

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