# Noise-compensating pulses for electrostatically controlled silicon spin qubits

@article{Wang2014NoisecompensatingPF, title={Noise-compensating pulses for electrostatically controlled silicon spin qubits}, author={Xin Wang and Fernando A. Calderon-Vargas and Muhed S. Rana and Jason P. Kestner and Edwin Barnes and Sankar Das Sarma}, journal={Physical Review B}, year={2014}, volume={90}, pages={155306} }

We study the performance of SUPCODE---a family of dynamically correcting pulses designed to cancel simultaneously both Overhauser and charge noise for singlet-triplet spin qubits---adapted to silicon devices with electrostatic control. We consider both natural Si and isotope-enriched Si systems, and in each case we investigate the behavior of individual gates under static noise and perform randomized benchmarking to obtain the average gate error under realistic 1/f noise. We find that in most…

## 9 Citations

### Noise filtering of composite pulses for singlet-triplet qubits

- PhysicsScientific reports
- 2016

This work performs a comprehensive theoretical study of the response of a type of dynamically corrected gates, namely the supcode for singlet-triplet qubits, to realistic 1/f noises with frequency spectra 1/ωα and finds that supcode offers improvement of the gate fidelity for α and the improvement becomes exponentially more pronounced with the increase of the noise exponent.

### Improving the gate fidelity of capacitively coupled spin qubits

- Physics
- 2014

Control protocols that implement two-qubit entangling gates while substantially suppressing errors due to both types of noise are presented and constitute an important step toward scalable quantum computation using spin qubits in semiconductor platforms.

### Analytic Filter-Function Derivatives for Quantum Optimal Control

- Computer SciencePhysical Review Applied
- 2022

To enable the use of gradient-based algorithms with fast convergence, an analytically derived function gradients with respect to control pulse amplitudes are presented, and a modular computational implementation compatible with quantum optimal control packages is provided.

### Reduced Sensitivity to Charge Noise in Semiconductor Spin Qubits via Symmetric Operation.

- PhysicsPhysical review letters
- 2016

It is found that this method reduces the dephasing effect of charge noise by more than a factor of 5 in comparison to operation near a charge-state anticrossing, increasing the number of observable exchange oscillations in the authors' qubit by a similar factor.

### Spin-qubit noise spectroscopy from randomized benchmarking by supervised learning

- Physics, Computer SciencePhysical Review A
- 2019

The results suggest that the neural network is capable of predicting noise spectra from randomized benchmarking, which can be an alternative method to measure noise Spectra in spin-qubit devices.

### Magnetic Gradient Fluctuations from Quadrupolar 73Ge in Si / SiGe Exchange-Only Qubits

- Physics
- 2020

We study the time-fluctuating magnetic gradient noise mechanisms in pairs of Si/SiGe quantum dots using exchange echo noise spectroscopy. We find through a combination of spectral inversion and…

### Logical Qubit in a Linear Array of Semiconductor Quantum Dots

- PhysicsPhysical Review X
- 2018

We design and analyze a logical qubit composed of a linear array of electron spins in semiconductor quantum dots. To avoid the difficulty of fully controlling a two-dimensional array of dots, we…

### Error correction of quantum system dynamics via measurement–feedback control

- PhysicsJournal of Physics B: Atomic, Molecular and Optical Physics
- 2019

In this paper, we generalize the application of a recently proposed quantum control technique called self-fulfilling prophesy (Uys et al 2018 Phys. Rev. A 97 060102) to achieve high-fidelity target…

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