Quantum Computation by Spin Parity Measurements with Encoded Spin Qubits
arXiv:2305.09727 · doi:10.1103/PhysRevB.108.035206
Abstract
Joint measurements of two-Pauli observables are a powerful tool for both the control and protection of quantum information. By following a simple recipe for measurement choices, single- and two- qubit rotations using two-Pauli parity and single qubit measurements are guaranteed to be unitary whilst requiring only a single ancilla qubit. This language for measurement based quantum computing is shown to be directly applicable to encoded double quantum dot singlet-triplet spin qubits, by measuring spin-parity between dots from neighboring qubits. Along with exchange interaction, a complete, leakage free, measurement based gate set can be shown, up to a known Pauli correction. Both theoretically exact spin-parity measurements and experimentally demonstrated asymmetric spin-parity measurements are shown to be viable for achieving the proposed measurement based scheme, provided some extra leakage mitigating measurement steps. This new method of spin qubit control offers a leakage suppressed, low resource overhead implementation of a measurement-based control that is viable on current spin qubit processor devices.
References in corpus (35)
- Measurement-based quantum computation with cluster states
- An addressable quantum dot qubit with fault-tolerant control fidelity
- A Two Qubit Logic Gate in Silicon
- A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
- Fault-tolerant quantum computation with high threshold in two dimensions
- Semiconductor Spin Qubits
- Scalable Designs for Quasiparticle-Poisoning-Protected Topological Quantum Computation with Majorana Zero Modes
- Computing with spin qubits at the surface code error threshold
- Fast universal quantum control above the fault-tolerance threshold in silicon
- Universal control of a six-qubit quantum processor in silicon
- A fault-tolerant one-way quantum computer
- Two-qubit silicon quantum processor with operation fidelity exceeding 99%
- Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation
- Charge detection enables free-electron quantum computation
- Dynamically Generated Logical Qubits
- Low-frequency charge noise in Si/SiGe quantum dots
- Universal logic with encoded spin qubits in silicon
- Experimental demonstration of a graph state quantum error-correction code
- Assessment of a silicon quantum dot spin qubit environment via noise spectroscopy
- Three-electron spin qubits
- Pauli Blockade in Silicon Quantum Dots with Spin-Orbit Control
- A Fault-Tolerant Honeycomb Memory
- The one-way quantum computer -- a non-network model of quantum computation
- Resonantly driven singlet-triplet spin qubit in silicon
- Spin-orbit Interactions for Singlet-Triplet Qubits in Silicon
- Fast and high-fidelity state preparation and measurement in triple-quantum-dot spin qubits
- Controlled-NOT for multiparticle qubits and topological quantum computation based on parity measurements
- Exchange-based CNOT gates for singlet-triplet qubits with spin orbit interaction
- Entangling spins by measuring charge: a parity-gate toolbox
- Exchange-based two-qubit gate for singlet-triplet qubits
- Quantum-limited measurement of spin qubits via curvature coupling to a cavity
- Bell-state tomography in a silicon many-electron artificial molecule
- Symmetry Protected Quantum Computation
- Measurement based Controlled Not gate for topological qubits in a Majorana fermion quantum-dot hybrid system
- Hybrid Exchange Measurement-Based Qubit Operations in Semiconductor Double Quantum Dot Qubits