Tootfinder

Gate-tunable spectrum and charge dispersion mitigation in a graphene superconducting qubit
Nicolas Aparicio, Simon Messelot, Edgar Bonet-Orozco, Eric Eyraud, Kenji Watanabe, Takashi Taniguchi, Johann Coraux, Julien Renard
https://arxiv.org/abs/2506.04959

Gate-tunable spectrum and charge dispersion mitigation in a graphene superconducting qubit
Controlling the energy spectrum of quantum-coherent superconducting circuits, i.e. the energies of excited states, the circuit anharmonicity and the states' charge dispersion, is essential for designing performant qubits. This control is usually achieved by adjusting the circuit's geometry. In-situ control is traditionally obtained via an external magnetic field, in the case of tunnel Josephson junctions. More recently, semiconductor-weak-links-based Josephson junctions have emerged as an alter…

Immer wenn ich lese "Kein Backup, kein Mitleid." muss ich mit dem Kopf schütteln. Hier ist nicht nur das "ob" (also warum man Backups machen muss) etwas das IMMER WIEDER erklärt werden muss, Auch das "wie", gerade das "wie", omg ist das "wie" wichtig!
aber abgesehen davon, nur weil man Jahrzehnte in einem Bereich tätig ist, geht ein Thema nicht weg, denn es haben mit der Zeit eben nicht alle verstanden. Muss mich da auch an eigene Nase…

Tunable magnons in a dual-gated 2D antiferromagnet
Nele Stetzuhn, Abhijeet M. Kumar, Sviatoslav Kovalchuk, Denis Yagodkin, Louis Simon, Samuel Ma\~nas-Valero, Eugenio Coronado, Takashi Taniguchi, Kenji Watanabe, Deepika Gill, Sangeeta Sharma, Piet Brouwer, Clemens von Korff Schmising, Stefan Eisebitt, Kirill I. Bolotin
https://a…

Tunable magnons in a dual-gated 2D antiferromagnet
The layered antiferromagnet CrSBr features magnons coupled to other quasiparticles, including excitons and polaritons, enabling their easy optical accessibility. In this work, we investigate the tunability of magnons in few-layered devices in response to changes in carrier density and the application of a perpendicular electric field. We demonstrate an on-chip tunability of the in- and out-of-phase magnon frequencies by up to 2 GHz. While the frequencies of both modes increase with the electron…

A tunable, continuous-wave 130-mW laser at 213 nm
Lukas M\"oller, Stephan Hannig, Stefan Truppe, Simon Stellmer
https://arxiv.org/abs/2506.08709 https…

A tunable, continuous-wave 130-mW laser at 213 nm
We present a tunable, continuous-wave (CW) laser system emitting at 213 nm, based on the frequency quadrupling of a single Ti:sapph laser. The setup features two sequential, cavity-enhanced second-harmonic generation (SHG) stages. The first stage uses an LBO crystal and achieves a conversion efficiency of over 80%, yielding up to 3.3 W at 426 nm. The second stage employs a Brewster-cut BBO crystal with an elliptical beam waist to mitigate UV-induced degradation, producing up to 130 mW of deep U…

Spectral-filtering-induced phase transition in passively mode-locked fiber lasers
Oumaima Ougrige, Florent Bessin, Charles Ciret, Herve Leblond, Fran\c{c}ois Sanchez
https://arxiv.org/abs/2506.18468

Spectral-filtering-induced phase transition in passively mode-locked fiber lasers
We investigate the effect of a tunable spectral filter on the dynamics of a passively mode-locked fiber laser in the anomalous dispersion regime. The results show that noise-like pulse emission evolves toward bound-state regime as the filter bandwidth is reduced. Thanks to the Shannon entropy applied to dispersive Fourier transform signals, it is demonstrated that the system undergoes a phase transition.