Spin entangled state transfer in quantum dot arrays: Coherent adiabatic and speed-up protocols

Abstract

Long-distance transfer of quantum states is an indispensable part of large-scale quantum information processing. We propose a novel scheme for the transfer of two-electron entangled states, from one edge of a quantum dot array to the other by coherent adiabatic passage. This protocol is mediated by pulsed tunneling barriers. In a second step, we seek for a speed up by shortcut to adiabaticity techniques. This significantly reduces the operation time and, thus, minimizes the impact of decoherence. For typical parameters of state-of-the-art solid state devices, the accelerated protocol has an operation time in the nanosecond range and terminates before a major coherence loss sets in. The scheme represents a promising candidate for entanglement transfer in solid state quantum information processing.

5 pages, 6 figures

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Cited by in corpus (13)

• Semiconductor Spin Qubits
• Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
• Spin shuttling in a silicon double quantum dot
• Quantum control of hole spin qubits in double quantum dots
• Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• Optimizing edge state transfer in a Su-Schrieffer-Heeger chain via hybrid analog-digital strategies
• Delayed transfer of entanglement to initially populated qubits
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Resonator-mediated quantum gate between distant charge qubits
• Electrical Interconnects for Silicon Spin Qubits
• Entangling nuclear spins in distant quantum dots via an electron bus
• Long-range spin transport in asymmetric quadruple quantum dots configurations