Exchange-based CNOT gates for singlet-triplet qubits with spin orbit interaction

Abstract

We propose a scheme for implementing the CNOT gate over qubits encoded in a pair of electron spins in a double quantum dot. The scheme is based on exchange and spin orbit interactions and on local gradients in Zeeman fields. We find that the optimal device geometry for this implementation involves effective magnetic fields that are parallel to the symmetry axis of the spin orbit interaction. We show that the switching times for the CNOT gate can be as fast as a few nanoseconds for realistic parameter values in GaAs semiconductors. Guided by recent advances in surface codes, we also consider the perpendicular geometry. In this case, leakage errors due to spin orbit interaction occur but can be suppressed in strong magnetic fields.

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Cited by in corpus (39)

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• Spin-orbit Interactions for Singlet-Triplet Qubits in Silicon
• Coupling spin qubits via superconductors
• Two-Qubit Gates for Resonant Exchange Qubits
• Phonon-Mediated Decay of Singlet-Triplet Qubits in Double Quantum Dots
• Exchange-based two-qubit gate for singlet-triplet qubits
• Controllable exchange coupling between two singlet-triplet qubits
• Hybrid spin and valley quantum computing with singlet-triplet qubits
• Two-Qubit Couplings of Singlet-Triplet Qubits Mediated by One Quantum State
• The asymmetric resonant exchange qubit under the influence of electrical noise
• Probing resonating valence bonds on a programmable germanium quantum simulator
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• Entangling Spins in Double Quantum Dots and Majorana Bound States
• High-fidelity two-qubit gates of hybrid superconducting-semiconducting singlet-triplet qubits
• Single-spin manipulation in a double quantum dot in the field of a micromagnet
• Floquet-Enhanced Spin Swaps
• Directly accessible entangling gates for capacitively coupled singlet-triplet qubits
• Coupled superconducting spin qubits with spin-orbit interaction
• Improving the gate fidelity of capacitively coupled spin qubits
• Counter-diabatic driving for fast spin control in a two-electron double quantum dot
• Capacitively coupled singlet-triplet qubits in the double charge resonant regime
• Control of the Two-Electron Exchange Interaction in a Nanowire Double Quantum Dot
• Phonon-assisted relaxation and decoherence of singlet-triplet qubits in Si/SiGe quantum dots
• Origin of giant valley splitting in silicon quantum wells induced by superlattice barriers
• Coupling of quantum-dot states via elastic-cotunneling and crossed Andreev reflection in a minimal Kitaev chain
• Driven nonlinear dynamics of two coupled exchange-only qubits
• Fast high-fidelity geometric gates for singlet-triplet qubits
• Charge noise suppression in capacitively coupled singlet-triplet spin qubits under magnetic field
• Robust entangling gate for capacitively coupled few-electron singlet-triplet qubits
• Random spin-orbit gates in the system of a Topological insulator and a Quantum dot
• Two-qubit logical operations in three quantum dots system
• Quantum Computation by Spin Parity Measurements with Encoded Spin Qubits
• Probe-assisted spin manipulation in one-dimensional quantum dots
• Quantum gates in coupled quantum dots controlled by coupling modulation