Charge-noise-insensitive gate operations for always-on, exchange-only qubits

Abstract

We introduce an always-on, exchange-only qubit made up of three localized semiconductor spins that offers a true "sweet spot" to fluctuations of the quantum dot energy levels. Both single- and two-qubit gate operations can be performed using only exchange pulses while maintaining this sweet spot. We show how to interconvert this qubit to other three-spin encoded qubits as a new resource for quantum computation and communication.

arXiv comment6 pages, 6 figures, corrected typos

References in corpus (22)

• Quantum Computation with Quantum Dots
• Charge insensitive qubit design derived from the Cooper pair box
• Decoherence Free Subspaces for Quantum Computation
• Manipulating the Quantum State of an Electrical Circuit
• Noiseless Quantum Codes
• Universal Quantum Computation with the Exchange Interaction
• Preserving coherence in quantum computation by pairing quantum bits
• Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits
• Universal quantum computation with spin-1/2 pairs and Heisenberg exchange
• Electrometry Using Coherent Exchange Oscillations in a Singlet-Triplet-Qubit
• Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation
• Noise suppression using symmetric exchange gates in spin qubits
• Self-Consistent Measurement and State Tomography of an Exchange-Only Spin Qubit
• The Resonant Exchange Qubit
• Charge fluctuation induced dephasing of exchange coupled spin qubits
• Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling
• Electrically-protected resonant exchange qubits in triple quantum dots
• Two-Qubit Gates for Resonant Exchange Qubits
• The asymmetric resonant exchange qubit under the influence of electrical noise
• Characterizing gate operations near the sweet spot of an exchange-only qubit
• Simple operation sequences to couple and interchange quantum information between spin qubits of different kinds
• Single-qubit gates in two steps with rotation axes in a single plane

Cited by in corpus (49)

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• Randomized benchmarking of barrier versus tilt control of a singlet-triplet qubit
• High-fidelity geometric gate for silicon-based spin qubits
• Symmetric Operation of the Resonant Exchange Qubit
• A quadrupolar exchange-only spin qubit
• Long-Distance Superexchange between Semiconductor Quantum-Dot Electron Spins
• Is all-electrical silicon quantum computing feasible in the long term?
• Crosstalk error correction through dynamical decoupling of single-qubit gates in capacitively coupled singlet-triplet semiconductor spin qubits
• Coherent multi-spin exchange coupling in a quantum-dot spin chain
• The exchange-only singlet-only spin qubit
• Quantum-limited measurement of spin qubits via curvature coupling to a cavity
• Resonant Exchange Operation in Triple-Quantum-Dot Qubits for Spin-Photon Transduction
• Environmental noise effects on entanglement fidelity of exchange-coupled semiconductor spin qubits
• Spin decoherence in a two-qubit CPHASE gate: the critical role of tunneling noise
• Signatures of atomic-scale structure in the energy dispersion and coherence of a Si quantum-dot qubit
• Modulated longitudinal gates on encoded spin-qubits via curvature couplings to a superconducting cavity
• Fast pulse sequences for dynamically corrected gates in single-triplet qubits
• A tunable hybrid qubit in a triple quantum dot
• Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot
• Theory of barrier vs tilt exchange gate operations in spin-based quantum computing
• Cavity-mediated entanglement of parametrically driven spin qubits via sidebands
• Leakage and sweet spots in triple-quantum-dot spin qubits: A molecular-orbital study
• Error correction for gate operations in systems of exchange-coupled singlet-triplet qubits in double quantum dots
• Democratizing Spin Qubits
• Suppression of leakage for a charge quadrupole qubit in triangular geometry
• Designing high-fidelity multi-qubit gates for semiconductor quantum dots through deep reinforcement learning
• Benchmarking of dynamically corrected gates for the exchange-only spin qubit in $1/f$ noise environment
• Hyperfine-induced dephasing in three-electron spin qubits
• Protected Solid-State Qubits
• Approximate exchange-only entangling gates for the three-spin-$1/2$ decoherence-free subsystem
• Efficient Two-Qubit Pulse Sequences Beyond CNOT
• Tunable charge qubit based on barrier-controlled triple quantum dots
• Dynamical second-order noise sweetspots in resonantly driven spin qubits
• Simulation of Coupling Strength of Capacitively Coupled Singlet-Triplet Qubits
• Two-qubit logical operations in three quantum dots system
• Leakage and dephasing in ${}^{28}$Si-based exchange-only spin qubits
• Pauli Spin Blockade in a Resonant Triple Quantum Dot Molecule
• Two-qubit sweet spots for capacitively coupled exchange-only spin qubits
• Universal control of superexchange in linear triple quantum dots with an empty mediator
• Universal singlet-triplet qubits implemented near the transverse sweet spot
• Fast optical control of a coded qubit in a triple quantum dot
• Transport-induced suppression of nuclear field fluctuations in multi-quantum-dot systems
• Control of threshold voltages in Si/SiGe quantum devices via optical illumination
• Maximizing the nondemolition nature of a quantum measurement via an adaptive readout protocol