Robust Multiple-Range Coherent Quantum State Transfer

Abstract

We propose a multiple-range quantum communication channel to realize coherent two-way quantum state transport with high fidelity. In our scheme, an information carrier (a qubit) and its remote partner are both adiabatically coupled to the same data bus, i.e., an N}-site tight-binding chain that has a single defect at the center. At the weak interaction regime, our system is effectively equivalent to a three level system of which a coherent superposition of the two carrier states constitutes a dark state. The adiabatic coupling allows a well controllable information exchange timing via the dark state between the two carriers. Numerical results show that our scheme is robust and efficient under practically inevitable perturbative defects of the data bus as well as environmental dephasing noise.

9 pages, 7 figures. Comments are wellcome

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Cited by in corpus (6)

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• Entanglement Polygon Inequality in Qubit Systems
• Shortening time scale to reduce thermal effects in quantum transistors
• A measure for adiabatic contributions to quantum transitions
• Adiabatic state distribution using anti-ferromagnetic spin systems
• Quantum state transfer and maximal entanglement between distant qubits using a minimal quasicrystal pump