Spatial noise correlations beyond nearest neighbors in Si-Ge spin qubits
We detect correlations in qubit-energy fluctuations of non-neighboring qubits defined in
isotopically purified Si/Si-Ge quantum dots. At low frequencies (where the noise is …
isotopically purified Si/Si-Ge quantum dots. At low frequencies (where the noise is …
Decoherence induced by a sparse bath of two-level fluctuators: Peculiar features of noise in high-quality qubits
M Mehmandoost, VV Dobrovitski - Physical Review Research, 2024 - APS
Progress in fabrication of semiconductor and superconductor qubits has greatly diminished
the number of decohering defects, thus decreasing the devastating low-frequency 1/f noise …
the number of decohering defects, thus decreasing the devastating low-frequency 1/f noise …
Passive and active suppression of transduced noise in silicon spin qubits
Addressing and mitigating decoherence sources plays an essential role in the development
of a scalable quantum computing system, which requires low gate errors to be consistently …
of a scalable quantum computing system, which requires low gate errors to be consistently …
Spatially correlated classical and quantum noise in driven qubits
Correlated noise across multiple qubits poses a significant challenge for achieving scalable
and fault-tolerant quantum processors. Despite recent experimental efforts to quantify this …
and fault-tolerant quantum processors. Despite recent experimental efforts to quantify this …
Correlations of spin splitting and orbital fluctuations due to 1/f charge noise in the Si/SiGe quantum dot
M Kȩpa, Ł Cywiński, JA Krzywda - Applied Physics Letters, 2023 - pubs.aip.org
Fluctuations in electric fields can change the position of a gate-defined quantum dot (QD) in
a semiconductor heterostructure. In the presence of magnetic field gradient, these stochastic …
a semiconductor heterostructure. In the presence of magnetic field gradient, these stochastic …
Multiaxis quantum noise spectroscopy robust to errors in state preparation and measurement
Characterizing temporally correlated noise and “non-Markovian” qubit dynamics is a key
prerequisite for achieving noise-tailored error mitigation and optimal device performance …
prerequisite for achieving noise-tailored error mitigation and optimal device performance …
Simulation and Measurement of Stray Fields for the Manipulation of Spin Qubits in One-and Two-Dimensional Arrays
M Aldeghi, R Allenspach, A Vervelaki, D Jetter… - Nano Letters, 2024 - ACS Publications
The inhomogeneous magnetic stray field of micromagnets has been extensively used to
manipulate electron spin qubits. By means of micromagnetic simulations and scanning …
manipulate electron spin qubits. By means of micromagnetic simulations and scanning …
Spatially correlated classical and quantum noise in driven qubits: The good, the bad, and the ugly
Correlated noise across multiple qubits poses a significant challenge for achieving scalable
and fault-tolerant quantum processors. Despite recent experimental efforts to quantify this …
and fault-tolerant quantum processors. Despite recent experimental efforts to quantify this …
Exploiting epitaxial strained germanium for scaling low noise spin qubits at the micron-scale
Disorder in the heterogeneous material stack of semiconductor spin qubit systems
introduces noise that compromises quantum information processing, posing a challenge to …
introduces noise that compromises quantum information processing, posing a challenge to …
Characterizing non-markovian quantum processes by fast bayesian tomography
To push gate performance to levels beyond the thresholds for quantum error correction, it is
important to characterize the error sources occurring on quantum gates. However, the …
important to characterize the error sources occurring on quantum gates. However, the …