Readout using Resonant Tunneling in Silicon Spin Qubits

Abstract

Spin qubit systems are one of the promising candidates for quantum computing. The quantum dot (QD) arrays are intensively investigated by many researchers. Because the energy-difference between the up-spin and down-spin states is very small, the detection of the qubit state is of prime importance in this field. Moreover, many wires are required to control qubit systems. Therefore, the integration of qubits and wires is also an important issue. In this study, the measurement process of QD arrays is theoretically investigated using resonant tunneling, controlled by a conventional transistor. It is shown that the number of possible measurements during coherence time can exceed a hundred under the backaction of the measurements owing to the nonlinear characteristics of resonant tunneling. It is also discussed to read out the measurement results by the conventional transistor.

11 pages, 13 figures

References in corpus (5)

• Single-shot read-out of an individual electron spin in a quantum dot
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Spin-polarized transport in II-VI magnetic resonant tunneling devices
• Mediated gates between spin qubits

Cited by in corpus (2)

• Effects of dissipation in reservoir computing using a spin qubit array
• Effects of valley splitting on resonant-tunneling readout of spin qubits