Qubit gates with simultaneous transport in double quantum dots

Abstract

A single electron spin in a double quantum dot in a magnetic field is considered in terms of a four-level system. By describing the electron motion between the potential minima by spin-conserving tunneling and spin flip caused by a spin-orbit coupling, we inversely engineer faster-than-adiabatic state manipulation operations based on the geometry of four-dimensional (4D) rotations. In particular, we show how to transport a qubit among the quantum dots performing simultaneously a required spin rotation.

arXiv comment12 pages, 5 figures

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• Spin entangled state transfer in quantum dot arrays: Coherent adiabatic and speed-up protocols
• Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• Fast and robust creation of an arbitrary single qubit state by nonadiabatic shortcut pulses in a three-level system
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Spin Josephson effects of spin-orbit-coupled Bose-Einstein condensates in a non-Hermitian double well
• Spin-Orbit Interaction Enabled High-Fidelity Two-Qubit Gates
• Entangling distant systems via universal nonadiabatic passage
• Improved anharmonic trap expansion through enhanced shortcuts to adiabaticity
• Simulation Methodology for Electron Transfer in CMOS Quantum Dots
• Controllable single spin evolution at sub-harmonics of electric dipole spin resonance enhanced by four-level Landau-Zener-St{ü}ckelberg-Majorana interference
• Thermal effects on a nonadiabatic spin-flip protocol of spin-orbit qubits
• Fast transport and splitting of spin-orbit-coupled spin-1 Bose-Einstein Condensates
• Light emission properties in a double quantum dot molecule immersed in a cavity: phonon-assisted tunneling
• Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling
• Spin-selective resonant tunneling induced by Rashba spin-orbit interaction in semiconductor nanowire
• Dynamic Transport Characteristics of Side-Coupled Double Quantum-Impurity Systems
• Robust composite two-qubit gates for silicon-based spin qubits
• Spin qubit shuttling between coupled quantum dots with inhomogeneous Landé g-tensors