Quantum gates in coupled quantum dots controlled by coupling modulation
Abstract
Abstract We studied the dynamics of a pair of single-electron double quantum dots (DQDs) under longitudinal and transverse static magnetic fields and time-dependent harmonic modulation of their interaction couplings. We propose to modulate the tunnel coupling between the QDs to produce one-qubit gates and the exchange coupling between DQDs to generate entangling gates, the set of operations required for quantum computing. We developed analytical approximations to set the conditions to control the qubits and applied them to numerical calculations to test the accuracy and robustness of the analytical model. The results shows that the unitary evolution of the two-electron state performs the designed operations even under conditions shifted from the ideal ones.
Fields of Study & Subjects
Semiconductor Quantum Structures and Devices
Quantum Dots Synthesis And Properties
Near-Field Optical Microscopy
Publication details
- Journal / source
- Quantum Science and Technology
- Publisher
- IOP Publishing
- Volume
- 11
- Issue
- 1
- Pages
- 015053–015053
- Publication date
- 19 January 2026
- Language
- EN