Robust Quantum State Transfer in Random Unpolarized Spin Chains

Understand

We propose and analyze a new approach for quantum state transfer between remote spin qubits.

• Specifically, we demonstrate that coherent quantum coupling between remote qubits can be achieved via certain classes of random, unpolarized (infinite temperature) spin chains.
• Our method is robust to coupling strength disorder and does not require manipulation or control over individual spins.
• In principle, it can be used to attain perfect state transfer over arbitrarily long range via purely Hamiltonian evolution and may be particularly applicable in a solid-state quantum information processor.