A fast "hybrid" silicon double quantum dot qubit

Abstract

We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot and two electrons in the other. The qubit itself is a set of two states with total spin quantum numbers $S^2=3/4$ ($S=\half$) and $S_z = -\half$, with the two different states being singlet and triplet in the doubly occupied dot. The architecture is relatively simple to fabricate, a universal set of fast operations can be implemented electrically, and the system has potentially long decoherence times. These are all extremely attractive properties for use in quantum information processing devices.

Includes text and supplemental material, 12 pages, 9 figures

References in corpus (9)

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• Coherent spin manipulation in an exchange-only qubit
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Cited by in corpus (149)

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• Strong electron-electron interactions in Si/SiGe quantum dots
• State-conditional coherent charge qubit oscillations in a Si/SiGe quadruple quantum dot
• Coupling of three-spin qubits to their electric environment
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• The asymmetric resonant exchange qubit under the influence of electrical noise
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• High-fidelity single-qubit gates in a strongly driven quantum dot hybrid qubit with $1/f$ charge noise
• Resonant Exchange Operation in Triple-Quantum-Dot Qubits for Spin-Photon Transduction
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• Longitudinal coupling between a Si/SiGe quantum dot and an off-chip TiN resonator
• CMOS Quantum Computing: Toward A Quantum Computer System-on-Chip
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• Long-Range Interaction between Charge and Spin Qubits in Quantum Dots
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• Wigner-molecularization-enabled dynamic nuclear field programming
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• Spin echo dynamics under an applied drift field in graphene nanoribbon superlattices
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• Orbital and electronic entanglement in quantum teleportation schemes
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• Modularized and Scalable Compilation for Double Quantum Dot Quatum Computing
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• All-electric single electron spin-to-charge conversion
• Transport-induced suppression of nuclear field fluctuations in multi-quantum-dot systems
• On the validity of microscopic calculations of double-quantum-dot spin qubits based on Fock-Darwin states
• Maximum density of quantum information in a scalable CMOS implementation of the hybrid qubit architecture
• Exploring Entanglement Spectrum and Phase Diagram in multi-electron Quantum Dot Chains
• Jenga-Krotov algorithm: Efficient compilation of multi-qubit gates for exchange-only qubits
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• Artificial versus Natural Atoms: The uncanny capability of the many-body Schrödinger equation to produce emergent behavior