# Interacting holes in Si and Ge double quantum dots: From a multiband approach to an effective-spin picture

@article{Secchi2021InteractingHI, title={Interacting holes in Si and Ge double quantum dots: From a multiband approach to an effective-spin picture}, author={Andrea Secchi and Laura Bellentani and Andrea Bertoni and Filippo Troiani}, journal={Physical Review B}, year={2021} }

The states of two electrons in tunnel–coupled semiconductor quantum dots can be effectively described in terms of a two–spin Hamiltonian with an isotropic Heisenberg interaction. A similar description needs to be generalized in the case of holes due to their multiband character and spin– orbit coupling, which mixes orbital and spin degrees of freedom, and splits J = 3/2 and J = 1/2 multiplets. Here we investigate two–hole states in prototypical coupled Si and Ge quantum dots via different…

## 3 Citations

### Quantum estimation of a charge distance from a hole-spin qubit in Si quantum dots

- Physics
- 2023

Hole-spin qubits in semiconductors represent a mature platform for quantum technological applications. Here we consider their use as sensors of the electrostatic environment, and specifically for…

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- PhysicsEntropy
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Few-electron states confined in quantum-dot arrays are key objects in quantum computing. The discrimination between these states is essential for the readout of a (multi-)qubit state, and can be…

### Anomalous Zero-Field Splitting for Hole Spin Qubits in Si and Ge Quantum Dots.

- PhysicsPhysical review letters
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An anomalous energy splitting of spin triplet states at zero magnetic field has recently been measured in germanium quantum dots. This zero-field splitting could crucially alter the coupling between…

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