Kavli Affiliate: Ronald Hanson | Summary:The tin-vacancy center in diamond (SnV) has emerged as a compelling building block for realizing next-generation quantum networks thanks to its excellent optical and spin properties. Coupling to photonic crystal cavities (PCCs) promises to further enhance the SnV light-matter interface and unlock a diverse range of entanglement generation protocols. Recent […]

Kavli Affiliate: Michael Wimmer | Summary:We theoretically explore the electronic structure of holes in cylindrical Germanium/Silicon core/shell nanowires using a perturbation theory approach. The approach yields a set of interpretable and transferable effective low-energy models for the lowest few sub-bands up to fifth order for experimentally relevant growth directions. In particular, we are able to […]

Kavli Affiliate: Mazhar Ali | Summary: Josephson junctions are essential devices in superconducting electronics and quantum computing hardware. Here we predict electrical control of the supercurrent in composite superconductor-insulator-ferroelectric-insulator-superconductor (S-I-FE-I-S) Josephson junctions. Inversion symmetry broken by unequal dielectric barrier thicknesses and/or potentials converts ferroelectric polarization reversal into a substantial change of the critical current. With […]

Kavli Affiliate: Wolfgang Tittel | Summary:We characterize the spectroscopic and coherence properties of the 1451.37 nm excited-state zero-phonon line (ZPL) between the $^3F_4$ and the $^3H_4$ manifolds of a thulium-doped yttrium aluminum perovskite ($textTm^3+$:$textYAlO_3$) crystal at temperatures around 1.5 K. We measure the absorption spectrum between the $^3H_6$ – $^3F_4$ and $^3F_4$ – $^3H_4$ manifolds, […]

Kavli Affiliate: Wolfgang Tittel | Summary:We characterize spectroscopic and coherence properties of the 1451.37 nm excited-state zero-phonon line (ZPL) between the $^3F_4$ and the $^3H_4$ manifolds of a thulium-doped yttrium aluminum perovskite (Tm$^3+$:YAlO$_3$) crystal at temperatures around 1.5 K. We measure the absorption spectrum between the $^3H_6$ – $^3F_4$ and $^3F_4$ – $^3H_4$ manifolds, the […]

Kavli Affiliate: Menno Veldhorst | Summary:Quantum simulators enable studies of many-body phenomena which are intractable with classical hardware. Spins in devices based on semiconductor quantum dots promise precise electrical control and scalability advantages, but accessing many-body phenomena has so far been restricted by challenges in nanofabrication and simultaneous control of multiple interactions. Here, we perform […]

Kavli Affiliate: Menno Veldhorst| First 5 Authors: Zarije Ademi, Zarije Ademi, , , | Summary:Semiconductor quantum processors have potential to scale to modular quantum computers, in which qubit registers are coupled by quantum links, enabling high connectivity and space for control circuitry. Individual spin-qubit registers have progressed to two-dimensional systems and execution of small quantum […]

Kavli Affiliate: Lieven Vandersypen| First 5 Authors: Zarije Ademi, Zarije Ademi, , , | Summary:Semiconductor quantum processors have potential to scale to modular quantum computers, in which qubit registers are coupled by quantum links, enabling high connectivity and space for control circuitry. Individual spin-qubit registers have progressed to two-dimensional systems and execution of small quantum […]

Kavli Affiliate: Menno Veldhorst| First 5 Authors: Zarije Ademi, Zarije Ademi, , , | Summary:Semiconductor quantum processors have potential to scale to modular quantum computers, in which qubit registers are coupled by quantum links, enabling high connectivity and space for control circuitry. Individual spin-qubit registers have progressed to two-dimensional systems and execution of small quantum […]

Kavli Affiliate: Menno Veldhorst | Summary:Semiconductor quantum processors have potential to scale to modular quantum computers, in which qubit registers are coupled by quantum links, enabling high connectivity and space for control circuitry. Individual spin-qubit registers have progressed to two-dimensional systems and execution of small quantum algorithms. Separately, high-fidelity spin shuttling has been demonstrated in […]