Thomas Astner
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View article: Strain-enabled control of the vanadium qudit in silicon carbide
Strain-enabled control of the vanadium qudit in silicon carbide Open
Vanadium in silicon carbide is a promising spin photon interface candidate with optical transitions in the telecom range and a long lived electron spin, hosted in an advanced semiconductor platform. In this detailed investigation of the de…
View article: Strain-enabled control of the vanadium qudit in silicon carbide
Strain-enabled control of the vanadium qudit in silicon carbide Open
Vanadium in silicon carbide is a promising spin photon interface candidate with optical transitions in the telecom range and a long lived electron spin, hosted in an advanced semiconductor platform. In this detailed investigation of the de…
View article: Vanadium in silicon carbide: telecom-ready spin centres with long relaxation lifetimes and hyperfine-resolved optical transitions
Vanadium in silicon carbide: telecom-ready spin centres with long relaxation lifetimes and hyperfine-resolved optical transitions Open
Vanadium in silicon carbide (SiC) is emerging as an important candidate system for quantum technology due to its optical transitions in the telecom wavelength range. However, several key characteristics of this defect family including thei…
View article: Quantum communication networks with defects in silicon carbide
Quantum communication networks with defects in silicon carbide Open
Quantum communication promises unprecedented communication capabilities enabled by the transmission of quantum states of light. However, current implementations face severe limitations in communication distance due to photon loss. Silicon …
View article: Datasets for "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide"
Datasets for "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide" Open
Datasets supporting the paper: "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide" by P. Cilibrizzi et al. The files are named as date_time_+"PLE_scan_"+frqInit…
View article: Datasets for "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide"
Datasets for "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide" Open
Datasets supporting the paper: "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide" by P. Cilibrizzi et al. The files are named as date_time_+"PLE_scan_"+frqInit…
View article: Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide
Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide Open
Spin-active quantum emitters have emerged as a leading platform for quantum technologies. However, one of their major limitations is the large spread in optical emission frequencies, which typically extends over tens of GHz. Here, we inves…
View article: Nuclear spin quantum memory in silicon carbide
Nuclear spin quantum memory in silicon carbide Open
Transition metal (TM) defects in silicon carbide (SiC) are a promising platform for applications in quantum technology. Some TM defects, e.g. vanadium, emit in one of the telecom bands, but the large ground state hyperfine manifold poses a…
View article: Coupling spin 'clock states' to superconducting circuits
Coupling spin 'clock states' to superconducting circuits Open
A central goal in quantum technologies is to maximize GT2, where G stands for the rate at which each qubit can be coherently driven and T2 is the qubit's phase coherence time. This is challenging, as increasing G (e.g. by coupling the qubi…
View article: Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions
Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions Open
A central goal in quantum technologies is to maximize $G$T$_{2}$, where $G$ stands for the coupling of a qubit to control and readout signals and T$_{2}$ is the qubit's coherence time. This is challenging, as increasing $G$ (e.g. by coupli…
View article: Superradiant Hybrid Quantum Devices
Superradiant Hybrid Quantum Devices Open
Superradiance is the archetypical collective phenomenon where radiation is amplified by the coherence of emitters. It plays a prominent role in optics, where it enables the design of lasers with substantially reduced linewidths, quantum me…
View article: Forest thinning in VR : A VR application with the theme of forest thinning
Forest thinning in VR : A VR application with the theme of forest thinning Open
The purpose with this project was to create a virtual reality game were the users should be able to carry out a thinning. The main goals are to use real forests terrains as terrain models in the game, the GameObjects and the teleportation …
View article: Ultralong relaxation times in bistable hybrid quantum systems
Ultralong relaxation times in bistable hybrid quantum systems Open
Amplitude bistability in a solid-state hybrid quantum system shows critical slowing down with ultralong relaxation times.
View article: Solid-state electron spin lifetime limited by phononic vacuum modes
Solid-state electron spin lifetime limited by phononic vacuum modes Open
Longitudinal relaxation is the process by which an excited spin ensemble decays into its thermal equilibrium with the environment. In solid-state spin systems relaxation into the phonon bath usually dominates over the coupling to the elect…
View article: Coherent Coupling of Remote Spin Ensembles via a Cavity Bus
Coherent Coupling of Remote Spin Ensembles via a Cavity Bus Open
We report coherent coupling between two macroscopically separated nitrogen-vacancy electron spin ensembles in a cavity quantum electrodynamics system. The coherent interaction between the distant ensembles is directly detected in the cavit…
View article: Publisher's Note: “Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator” [Appl. Phys. Lett. <b>109</b>, 033508 (2016)]
Publisher's Note: “Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator” [Appl. Phys. Lett. <b>109</b>, 033508 (2016)] Open
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View article: Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator
Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator Open
We design and implement 3D-lumped element microwave cavities that spatially focus magnetic fields to a small mode volume. They allow coherent and uniform coupling to electron spins hosted by nitrogen vacancy centers in diamond. We achieve …