Flux-Tunable Hybridization in a Double Quantum Dot Interferometer

Kavli Affiliate: Srijit Goswami | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: A single fermion shared between two states threaded by a magnetic flux is the simplest possible quantum system in which interference is predicted to occur. We demonstrate tuning of the tunnel coupling between two such fermionic levels with flux, implemented […]


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GPU-Accelerated LOD Generation for Point Clouds

Kavli Affiliate: Michael Wimmer | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: About: We introduce a GPU-accelerated LOD construction process that creates a hybrid voxel-point-based variation of the widely used layered point cloud (LPC) structure for LOD rendering and streaming. The massive performance improvements provided by the GPU allow us to improve […]


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A Fiber-coupled Scanning Magnetometer with Nitrogen-Vacancy Spins in a Diamond Nanobeam

Kavli Affiliate: Ronald Hanson | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Magnetic imaging with nitrogen-vacancy (NV) spins in diamond is becoming an established tool for studying nanoscale physics in condensed matter systems. However, the optical access required for NV spin readout remains an important hurdle for operation in challenging environments such […]


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Surface acoustic wave resonators on thin film piezoelectric substrates for quantum acoustics

Kavli Affiliate: Simon Groblacher | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Lithium Niobate (LNO) is a well established material for Surface Acoustic Wave (SAW) devices including resonators, delay lines and filters. Recently, multilayer substrates based on LNO thin films have become commercially available. Here, we present a systematic study of the […]


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Waveguide-Cavity Scattering in High-Frequency Dissipative Optomechanics

Kavli Affiliate: Simon Groblacher | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: The coherent transduction of information between microwave and optical domains is a fundamental building block for future quantum networks. A promising way to bridge these widely different frequencies is using high-frequency nanomechanical resonators interacting with low-loss optical modes. State-of-the-art optomechanical […]


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Controlled crossed Andreev reflection and elastic co-tunneling mediated by Andreev bound states

Kavli Affiliate: Michael Wimmer | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: A short superconducting segment can couple attached quantum dots via elastic co-tunneling (ECT) and crossed Andreev reflection (CAR). Such coupled quantum dots can host Majorana bound states provided that the ratio between CAR and ECT can be controlled. Metallic superconductors […]


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Fusion protocol for Majorana modes in coupled quantum dots

Kavli Affiliate: Michael Wimmer | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: In a recent breakthrough experiment (arXiv:2206.08045), Majorana zero modes have been observed in tunnel spectroscopy for a minimal Kitaev chain constructed from coupled quantum dots. However, as Ising anyons, Majoranas’ most fundamental property of non-Abelian statistics is yet to be […]


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The gate-tunable Josephson diode

Kavli Affiliate: L. P. Kouwenhoven | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Superconducting diodes are a recently-discovered quantum analogueue of classical diodes. The superconducting diode effect relies on the breaking of both time-reversal and inversion symmetry. As a result, the critical current of a superconductor can become dependent on the direction […]


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Silicon anisotropy in a bi-dimensional optomechanical cavity

Kavli Affiliate: Simon Groblacher | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: In this work, we study the effects of mechanical anisotropy in a 2D optomechanical crystal geometry. We fabricate and measure devices with different orientations, showing the dependence of the mechanical spectrum and the optomechanical coupling with the relative angle of […]


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Beating ringdowns of near-degenerate mechanical resonances

Kavli Affiliate: Simon Groblacher | First 5 Authors: [#item_custom_name[1]], [#item_custom_name[2]], [#item_custom_name[3]], [#item_custom_name[4]], [#item_custom_name[5]] | Summary: Mechanical resonators that possess coupled modes with harmonic frequency relations have recently sparked interest due to their suitability for controllable energy transfer and non-Hermitian dynamics. Here, we show coupled high Q-factor ($>10^4$) modes with a nearly 1:1 frequency relation in […]


Continue.. Beating ringdowns of near-degenerate mechanical resonances