Spin Star as Switch for Quantum Networks

Abstract

Quantum state transfer is an important task in quantum information processing. It is known that one can engineer the couplings of a one-dimensional spin chain to achieve the goal of perfect state transfer. To leverage the value of these spin chains, a spin star is potentially useful for connecting different parts of a quantum network. In this work, we extend the spin-chain engineering problem to the problems with a topology of a star network. We show that a permanently coupled spin star can function as a network switch for transferring quantum states selectively from one node to another by varying the local potentials only. Together with one-dimensional chains, this result allows applications of quantum state transfer be applied to more general quantum networks.

10 pages, 2 figure

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Cited by in corpus (9)

• Integrability and dark states in an anisotropic central spin model
• A coherent router for quantum networks
• Quantum simulation of the central spin model with a Rydberg atom and polar molecules in optical tweezers
• Spin-chain-star systems: entangling multiple chains of spin qubits
• Integrability and quench dynamics in the spin-1 central spin XX model
• Exact Model Reduction for Continuous-Time Open Quantum Dynamics
• Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins
• Quantum refrigerator embedded in spin-star environments: Scalings of temperature and refrigeration time
• Hamiltonian Engineering in Quantum Spin Networks