Tootfinder

Pytanko: jechać z 50-minutową przesiadką we Wrocławiu [PR KD], czy z przesiadkami w Poznaniu, Ostrowie Wielkopolskim i Krotoszynie (30 10 20 minut) [KW PR KW KD]?
Wiem, głupio pytam…
#mikol

Spin Correlations in Recirculating Multipass Alkali Cells for Advancing Quantum Magnetometry
Qian Ling Kee, Lingyi Zhao, Ruvi Lecamwasam, Biveen Shajilal, Xinan Liang, Joel K Jose, Yao Chen, Ping Koy Lam, Tao Wang
https://arxiv.org/abs/2506.14160

Spin Correlations in Recirculating Multipass Alkali Cells for Advancing Quantum Magnetometry
Multipass cells are critical components in a variety of quantum technologies, including atomic magnetometers and optical quantum memories, due to their ability to achieve long optical paths within compact volumes. In optical magnetometry, increasing the optical depth through multipass geometries enhances sensitivity by reducing photon shot noise and enabling quantum nondemolition (QND) detection. In this work, we present a novel recirculating multipass alkali cell that improves the active-to-ce…

In the ISE2025 lecture today, our students learned about unsupervised learning on the example of k-Means clustering. One nice hands-on example is image colour reduction based on k-means clustering, as demonstrated in a colab notebook (based on the Python DataScience Handbook by Vanderplus)
colab notebook: https://…

heise | KI-Analyse für Aktien-Diskussionen auf Reddit: Anleitung zum Nachbauen
Mit Python lassen sich populäre Aktien in r/wallstreetbets aufspüren. Wir zeigen, wie Sie einen Aktien-Crawler um eine KI erweitern, die Diskussionen auswertet.

¿De TO-MA a JA-KA?
Columna de Pula Escobar.
#Columnistas

Dynamically Dressed States of a Quantum Four-Level System
Carolin Calcagno, Friedrich Sbresny, Thomas K. Bracht, Sang Kyu Kim, Eduardo Zubizarreta Casalengua, Katarina Boos, William Rauhaus, Hubert Riedl, Jonathan J. Finley, Doris E. Reiter, Kai M\"uller
https://arxiv.org/abs/2506.14643…

Dynamically Dressed States of a Quantum Four-Level System
In this work, we experimentally and theoretically study the dressed-state emission of the biexciton-exciton cascade in a semiconductor quantum dot under pulsed, resonant, two-photon excitation. Building on the well-characterized steady-state dressed emission of the four-level system, we examine its dynamic counterpart under pulsed, resonant excitation, addressing both experimental observations and theoretical modeling. Here we report several sidebands emerging from the biexciton-to-exciton tran…

GitChameleon: Evaluating AI Code Generation Against Python Library Version Incompatibilities
Diganta Misra, Nizar Islah, Victor May, Brice Rauby, Zihan Wang, Justine Gehring, Antonio Orvieto, Muawiz Chaudhary, Eilif B. Muller, Irina Rish, Samira Ebrahimi Kahou, Massimo Caccia
https://arxiv.org/abs/2507.12367

GitChameleon: Evaluating AI Code Generation Against Python Library Version Incompatibilities
The rapid evolution of software libraries poses a considerable hurdle for code generation, necessitating continuous adaptation to frequent version updates while preserving backward compatibility. While existing code evolution benchmarks provide valuable insights, they typically lack execution-based evaluation for generating code compliant with specific library versions. To address this, we introduce GitChameleon, a novel, meticulously curated dataset comprising 328 Python code completion proble…

Putin telefoniert mit Iran und Israel
Wegen der israelischen Luftangriffe auf Atomanlagen im Iran hat Russlands Präsident Wladimir Putin mit beiden Seiten telefoniert. Im Gespräch mit dem iranischen Staatschef Massud Peseschkian verurteilte Putin nach Angaben des Kreml Israels Vorgehen als Verstoß gegen die UN-Charta und das Völkerrecht. Russland sei immer für eine diplomatische Lösung des Streits um das iranische Atomprogram…
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Ukraine-Liveblog: ++ Kiew bestätigt Erhalt von weiteren Soldatenleichen ++
Die Ukraine hat den Erhalt von weiteren Leichen gefallener Soldaten bekanntgegeben. Nach dem Willen von Russlands Präsidenten Putin sollen Kampfdrohnen zu einer eigene Waffengattung in der Armee werden. Der Liveblog vom Freitag zum Nachlesen.

Time-bin encoded quantum key distribution over 120 km with a telecom quantum dot source
Jipeng Wang, Joscha Hanel, Zenghui Jiang, Raphael Joos, Michael Jetter, Eddy Patrick Rugeramigabo, Simone Luca Portalupi, Peter Michler, Xiao-Yu Cao, Hua-Lei Yin, Shan Lei, Jingzhong Yang, Michael Zopf, Fei Ding
https://arxiv.org/abs/2506.155…

Time-bin encoded quantum key distribution over 120 km with a telecom quantum dot source
Quantum key distribution (QKD) with deterministic single photon sources has been demonstrated over intercity fiber and free-space channels. The previous implementations relied mainly on polarization encoding schemes, which are susceptible to birefringence, polarization-mode dispersion and polarization-dependent loss in practical fiber networks. In contrast, time-bin encoding offers inherent robustness and has been widely adopted in mature QKD systems using weak coherent laser pulses. However, i…

Certifying spatial entanglement between non-degenerate photon pairs with a camera
Emma Brambila, Raphael Guitter, Ren\'e Sondenheimer, Markus Gr\"afe, Hugo Defienne
https://arxiv.org/abs/2506.14300

Certifying spatial entanglement between non-degenerate photon pairs with a camera
We investigate transverse spatial entanglement between photon pairs of different wavelengths using a camera-based coincidence technique. By adapting the correlation measurements to the photons frequencies, we certify the presence of entanglement between the pairs through violation of an Einstein-Podolsky-Rosen criterion. Additionally, we examine how parameters such as pump waist and crystal length influence these correlations. Our results highlight key differences from the frequency-degenerate …