Tunable Quantum Coherence of Luminescent Molecular Spins Organized via Block Copolymer Self-Assembly

Abstract

Electronic or nuclear spins represent promising candidates of qubits for applications in quantum information technologies and spintronic devices. However, it remains a challenge to achieve scalable and spatially defined organization of a large number of spins as qubits, which is essential in the feasible fabrication of quantum circuits. We report a strategy of block copolymer self-assembly to organize molecular spins as qubits across molecular to micro-/nano-scales in polymeric films of organic luminescent radicals centered in star-like block copolymers. We have achieved not only scalable and spatially defined organization of the molecular spins in polymeric films with long-range periodic ordering but also controllable spin-lattice relaxation dynamics and spin coherence lifetimes that can be finely tuned by the domain sizes and rigidities of the polymeric matrices.