Voltage-controlled coded qubit based on electron spin

Abstract

We design and analyze a solid state qubit based on electron spin and controlled by electrical means. The coded qubit is composed of a three-electron complex in three tunable gated quantum dots. The two logical states of a qubit, |0L> and |1L>, reside in a degenerate subspace of total spin S=1/2 states. We demonstrate how applying voltages to specific gates changes the one-electron properties of the structure, and show how electron-electron interaction translates these changes into the manipulation of the two lowest energy states of the three-electron complex.

11 pages + 3 figures

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Cited by in corpus (24)

• Stability Diagram of a Few-Electron Triple Dot
• Self-Consistent Measurement and State Tomography of an Exchange-Only Spin Qubit
• An electrostatically defined serial triple quantum dot charged with few electrons
• Topological Hunds rules and the electronic properties of a triple lateral quantum dot molecule
• Electrically-protected resonant exchange qubits in triple quantum dots
• Three-electron spin qubits
• Spin selective Aharonov-Bohm oscillations in a lateral triple quantum dot
• Theory of spin, electronic and transport properties of the lateral triple quantum dot molecule in a magnetic field
• The three dimensionality of triple quantum dot stability diagrams
• Phonon-induced dephasing of singlet-triplet superpositions in double quantum dots without spin-orbit coupling
• Quantum circuits based on coded qubits encoded in chirality of electron spin complexes in triple quantum dots
• Herzberg Circuit and Berry's Phase in Chirality-based Coded Qubit in a Triangular Triple Quantum Dot
• Theory of electronic properties and quantum spin blockade in a gated linear triple quantum dot with one electron spin each
• Read-out and Dynamics of the Qubit Built on Three Quantum Dots
• Greenberger-Horne-Zeilinger States in Quantum Dot Molecule
• Theory of the time-resolved Kerr rotation on trapped holes
• Single-step high-fidelity three-qubit gates by anisotropic chiral interactions
• Energy spectra of three electrons in SiGe/Si/SiGe laterally coupled triple quantum dots
• Electron-Electron interactions, topological phase and optical properties of a charged artificial benzene ring
• Two-qubit logical operations in three quantum dots system
• Spin dynamics and magneto-optical response in charge-neutral tunnel-coupled quantum dots
• Fast optical control of a coded qubit in a triple quantum dot
• Landau-Zener Transitions in Spin Qubit Encoded in Three Quantum Dots
• XOR logic gate on electron spin qubits in quadruple coupled quantum dots