Coherent long-range transfer of two-electron states in ac-driven triple quantum dots

Abstract

Preparation and transfer of quantum states is a fundamental task in quantum information. We propose a protocol to prepare a state in the left and center quantum dots of a triple dot array and transfer it directly to the center and right dots. Initially the state in the left and center dots is prepared combining the exchange interaction and magnetic field gradients. Once in the desired state, ac gate voltages in the outer dots are switched on, allowing to select a given photoassisted long-range path and to transfer the prepared state directly from one edge to the other with high fidelity. We investigate the effect of charge noise on the protocol and propose a configuration in which the transfer can be performed with high fidelity. Our proposal can be experimentally implemented and is a promising avenue for transferring quantum states between two spatially separated two-level systems.

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• Semiconductor Spin Qubits
• Spin shuttling in a silicon double quantum dot
• Quantum control of hole spin qubits in double quantum dots
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Photo-assisted spin transport in double quantum dots with spin-orbit interaction
• Dynamical second-order noise sweetspots in resonantly driven spin qubits
• Designing adiabatic time-evolution from high frequency bichromatic sources
• Resonator-mediated quantum gate between distant charge qubits
• Perfect Quantum State Transfer in Glauber-Fock Cavity Array
• Long-range spin transport in asymmetric quadruple quantum dots configurations
• Efficient electron transfer in quantum dot chains controlled by a cubic detuning profile via shortcuts to adiabaticity