Berlin 2024 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 19: Quantum Dots and Wires: Optics I

HL 19.1: Vortrag

Dienstag, 19. März 2024, 09:30–09:45, EW 202

Dynamics of Robust Photonic Cluster-State Generation from Quantum-Dot Molecules — •David Bauch, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher — Physics Department, CeOPP, and PhoQS, Paderborn University, Germany

Quantum Dot Molecules (QDMs) have garnered significant attention for their role in measurement-based quantum computation and communication, specifically due to their ability to generate indistinguishable and temporally strongly entangled photon states [1]. Recent theoretical strides have advanced methods for generating these states across various physical systems. Within the intrinsically emerging lambda systems in QDMs, rotations and excitations between the ground states facilitate photon generation, contributing to the formation of cluster states, photonic graph states, and beyond [1,2]. Our research focusses on the generation of simple linear cluster states from QDMs. We demonstrate temporal dynamics, strong correlations, time-bin entanglement through stabilizer generator expectation values and indistinguishability among emitted photons. Our numerical exploration provides detailed insights into the efficiency and viability of the emission protocol for the deterministic generation of highly entangled photonic cluster states. This serves as a crucial steppingstone for advancing the generation of more intricate states such as higher dimensional photonic cluster and graph states, marking a noteworthy step towards the utilization of photonic quantum states in practical applications.

[1] Vezvaee et al., Phys. Rev. Appl. 18.L061003 (2022). [2] Raissi et al., arXiv preprint 2211.13242 (2022)

Keywords: Quantum Dot Molecules; Photonic Cluster States; Stabilizer Generator; Higher order Correlations; Photonic Graph States