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Published on: June 3, 2015
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Robust electron spin qubit control in a nanowire double quantum dot
Runyu Lu1, Kaipeng Liu2, Yue Ban3,4,5
1School of Materials Science and Engineering, Shanghai University, Shanghai 200444, People's Republic of China.
Summary
This study enhances quantum computing by developing robust control for electron spin qubits in quantum dots. Techniques like shortcuts to adiabaticity (STA) and inverse optimization minimize errors for reliable quantum algorithms.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Quantum Computing
Background:
- Electron spin qubits in quantum dots are crucial for quantum computation.
- Robust manipulation is essential for reliable quantum algorithms.
- Shortcuts to adiabaticity (STA) offers efficient quantum control.
Purpose of the Study:
- To investigate robust control of singlet-triplet qubits in nanowire double quantum dots.
- To optimize STA techniques against systematic errors from control fields and interactions.
- To combine STA with optimal control for designing robust control fields and operation times.
Main Methods:
- Utilizing inverse engineering, a technique within shortcuts to adiabaticity (STA).
- Applying robust inverse optimization by combining optimal control with STA.
- Analyzing control field optimization considering magnetic fields and spin-orbit coupling.
Main Results:
- Demonstrated optimization of STA for robust qubit control.
- Successfully designed optimal control fields and operation times using robust inverse optimization.
- Addressed systematic errors arising from control fields and perturbative interactions.
Conclusions:
- Robust control of electron spin qubits is achievable using optimized STA techniques.
- The developed methods enhance the reliability of quantum computing operations.
- This research contributes to the practical realization of quantum computers.
