Cavity-induced switching between Bell-state textures in a quantum dot

Abstract

Nanoscale quantum dots in microwave cavities can be used as a laboratory for exploring electron-electron interactions and their spin in the presence of quantized light and a magnetic field. We show how a simple theoretical model of this interplay at resonance predicts complex but measurable effects. New polariton states emerge that combine spin, relative modes, and radiation. These states have intricate spin-space correlations and undergo polariton transitions controlled by the microwave cavity field. We uncover novel topological effects involving highly correlated spin and charge density that display singlet-triplet and inhomogeneous Bell-state distributions. Signatures of these transitions are imprinted in the photon distribution, which will allow for optical read-out protocols in future experiments and nanoscale quantum technologies.

arXiv comment11 pages, 7 figures, supplementary material is located after the bibliography

References in corpus (23)

• Topological insulators and superconductors
• Quantum Computation with Quantum Dots
• Circuit Quantum Electrodynamics
• Ultrastrong coupling between light and matter
• Observation of Floquet-Bloch states on the surface of a topological insulator
• Ultrastrong coupling regimes of light-matter interaction
• Nanophotonic quantum phase switch with a single atom
• A Coherent Spin-Photon Interface in Silicon
• Entangling photons using a charged quantum dot in a microcavity
• Cavity quantum electrodynamics in the non-perturbative regime
• Spin relaxation and anticrossing in quantum dots: Rashba versus Dresselhaus spin-orbit coupling
• Spin Cross-Correlation Experiments in an Electron Entangler
• Quantum simulation of antiferromagnetic Heisenberg chain with gate-defined quantum dots
• A strong Bell correlation witness between spatially separated pairs of atoms
• Analytic results for $N$ particles with $1/r^2$ interaction in two dimensions and an external magnetic field
• Tuning of the spin-orbit interaction in a quantum dot by an in-plane magnetic field
• Deterministically Charged Quantum Dots in Photonic Crystal Nanoresonators for Efficient Spin-Photon Interfaces
• Chiral emission induced by optical Zeeman effect in polariton micropillars
• An NMR-based nanostructure switch for quantum logic
• Unique Spin Vortices in Quantum Dots with Spin-orbit Couplings
• Microscopic analytical theory of a correlated, two-dimensional N-electron gas in a magnetic field
• Tuning the Topological Features of Quantum-Dot Hydrogen and Helium by a Magnetic Field
• Spin and tunneling dynamics in an asymmetrical double quantum dot with spin - orbit coupling