Spatial noise correlations beyond nearest-neighbor in ${}^{28}$Si/SiGe spin qubits

Abstract

We detect correlations in qubit-energy fluctuations of non-neighboring qubits defined in isotopically purified Si/SiGe quantum dots. At low frequencies (where the noise is strongest), the correlation coefficient reaches 10% for a next-nearest-neighbor qubit-pair separated by 200 nm. Assigning the observed noise to be of electrical origin, a simple theoretical model quantitatively reproduces the measurements and predicts a polynomial decay of correlations with interqubit distance. Our results quantify long-range correlations of noise dephasing quantum-dot spin qubits arranged in arrays, essential for scalability and fault-tolerance of such systems.

11 pages, 8 figures

References in corpus (11)

• Single-shot read-out of an individual electron spin in a quantum dot
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Scalable gate architecture for densely packed semiconductor spin qubits
• A Reconfigurable Gate Architecture for Si/SiGe Quantum Dots
• Multiqubit Spectroscopy of Gaussian Quantum Noise
• Measurement of Temporal Correlations of the Overhauser Field in a Double Quantum Dot
• Radio-frequency detected fast charge sensing in undoped silicon quantum dots
• Robust micro-magnet design for fast electrical manipulations of single spins in quantum dots
• Quantum nondemolition measurement of an electron spin qubit
• First-principles hyperfine tensors for electrons and holes in GaAs and silicon

Cited by in corpus (22)

• Exploiting epitaxial strained germanium for scaling low noise spin qubits at the micron-scale
• Real-time feedback protocols for optimizing fault-tolerant two-qubit gate fidelities in a silicon spin system
• Decoherence induced by a sparse bath of two-level fluctuators: peculiar features of $1/f$ noise in high-quality qubits
• SPAM-Robust Multi-axis Quantum Noise Spectroscopy in Temporally Correlated Environments
• Solid-state platform for cooperative quantum dynamics driven by correlated emission
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• Passive and active suppression of transduced noise in silicon spin qubits
• Interacting Two-Level Systems as a Source of 1/f Charge Noise in Quantum Dot Qubits
• Decoherence of electron spin qubit during transfer between two semiconductor quantum dots at low magnetic fields
• Limitations to Dynamical Error Suppression and Gate-Error Virtualization from Temporally Correlated Nonclassical Noise
• The origins of noise in the Zeeman splitting of spin qubits in natural-silicon devices
• Nanophotonic Super-dephasing in Collective Atom-Atom Interactions
• Noise Correlations in a 1D Silicon Spin Qubit Array
• Erasure conversion for singlet-triplet spin qubits enables high-performance shuttling-based quantum error correction
• Wavelet correlation noise analysis for qubit operation variable time series
• Unifying non-Markovian characterisation with an efficient and self-consistent framework
• Ab initio modelling of quantum dot qubits: Coupling, gate dynamics and robustness versus charge noise
• Noise cross-correlations from single-shot measurements
• Decoherence and fidelity enhancement during shuttling of entangled spin qubits
• Efficient learning and optimizing non-Gaussian correlated noise in digitally controlled qubit systems
• Comparison of spin-qubit architectures for quantum error-correcting codes
• Robust Tripartite Entanglement Generation via Correlated Noise in Spin Qubits