Pulse-gated quantum dot hybrid qubit

Abstract

A quantum dot hybrid qubit formed from three electrons in a double quantum dot has the potential for great speed, due to presence of level crossings where the qubit becomes charge-like. Here, we show how to take full advantage of the level crossings in a pulsed gating scheme, which decomposes the spin qubit into a series of charge transitions. We develop one and two-qubit dc quantum gates that are simpler than the previously proposed ac gates. We obtain closed form solutions for the control sequences and show that these sub-nanosecond gates can achieve high fidelities.

~5 pages, 3 figures, includes supplemental information

References in corpus (5)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits
• Coherent spin manipulation in an exchange-only qubit
• Conditional operation of a spin qubit

Cited by in corpus (64)

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• QCAD Simulation and Optimization of Semiconductor Quantum Dots
• Achieving High Fidelity Single Qubit Gates in a Strongly Driven Silicon Quantum Dot Hybrid Qubit
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• Coherent Tunneling by Adiabatic Passage of an exchange-only spin qubit in a double quantum dot chain
• Universal Set of Quantum Gates for Double-Dot Exchange-Only Spin Qubits with Intradot Coupling
• Decoherence of an exchange qubit by hyperfine interaction
• Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit
• Spin blockade and coherent dynamics of high-spin states in a three-electron double quantum dot
• Adiabatic two-qubit gates in capacitively coupled quantum dot hybrid qubits
• High-fidelity single-qubit gates in a strongly driven quantum dot hybrid qubit with $1/f$ charge noise
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• Control of the Two-Electron Exchange Interaction in a Nanowire Double Quantum Dot
• Negative exchange interactions in coupled few-electron quantum dots
• High Fidelity Singlet-Triplet $S$-$T_{-}$ Qubits in Inhomogeneous Magnetic Fields
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• Interplay of exchange and superexchange in triple quantum dots
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• Anisotropy with respect to the applied magnetic field of spin qubit decoherence times
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• Two-qubit sweet spots for capacitively coupled exchange-only spin qubits
• Passive stabilization of hole spin qubit using optical Stark effect
• Influence of Random Telegraph Noise on Quantum Bit Gate Operation
• Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot
• Fast optical control of a coded qubit in a triple quantum dot
• All-electric single electron spin-to-charge conversion
• Proposed Five-Electron Charge Quadrupole Qubit
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