Abstract

Quantum computing requires stable qubits that can hold information for long periods of time. Researchers assemble a hybrid double quantum dot that is both scalable and possesses a long-lived quantum memory.

Highlights

  • Quantum physics, when applied to computing, is projected to usher in a new computational paradigm with great potential applications in cryptography and simulation [1]

  • Such a double dot could take advantage of fast spin manipulations using gate voltage to form a hybrid singlet-triplet qubit coupled to the long-lived quantum memory offered by its nuclear spin

  • We have investigated a hybrid double-dot system formed by a single donor and a corner dot in a single silicon nanowire transistor

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Summary

INTRODUCTION

Quantum physics, when applied to computing, is projected to usher in a new computational paradigm with great potential applications in cryptography and simulation [1]. It is attractive to investigate the possibility of hybrid architectures, which bring together the advantages of these two systems by coupling a quantum dot to a donor atom [23,24] Such a double dot could take advantage of fast spin manipulations using gate voltage to form a hybrid singlet-triplet qubit coupled to the long-lived quantum memory offered by its nuclear spin. This hybrid architecture could be used to create spin buses with. These results demonstrate the potential of a donor-dot system as a new singlet-triplet qubit

Device fabrication and measurement setup
Charge stability diagram
Interdot charge transition and quantum capacitance
Tunnel coupling and charge dephasing time
Charge relaxation
SPIN BLOCKADE
OUTLOOK AND CONCLUSION
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