Tootfinder

Polymer-based flexible multi-shank probes for simultaneous intracortical microstimulation and two-photon calcium imaging https://www.biorxiv.org/content/10.64898/2026.02.09.704741v1 as part of ReVision Implant visual prosthesis development;

Nonlinear optical spectra from Rydberg-mediated photon-photon interactions
Xinghan Wang, Yupeng Wang, Aishik Panja, Qi-Yu Liang
https://arxiv.org/abs/2602.11563 https://

🇺🇦 #NowPlaying on KEXP's #DriveTime
Deetron:
🎵 Photon (Carl Cox Remix)
#Deetron
https://deetron.bandcamp.com/track/photon-deetron-wp-dub
https://open.spotify.com/track/6jtAB7NxKWSa80H3JYukFD

Photon counting beyond the rotating-wave approximation
Steven Kim, Fabian Hassler
https://arxiv.org/abs/2602.10950 https://arxiv.org/pdf/2602.10950

Austin-based Neurophos, which develops a photon-based "Optical Processing Unit" to replace GPUs in AI training, raised $110M led by Bill Gates' Gates Frontier (Edward Ludlow/Bloomberg)
https://www.bloomberg.com/news/articles/20

Development and characterization of hybrid MCP-PMT with embedded Timepix4 ASIC used as pixelated anode
Riccardo Bolzonella, Jerome Alozy, Rafael Ballabriga, Nicol\`o Vladi Biesuz, Michael Campbell, Viola Cavallini, Angelo Cotta Ramusino, Massimiliano Fiorini, Edoardo Franzoso, Marco Guarise, Xavi Llopart Cudie, Gabriele Romolini, Alessandro Saputi
https://arxiv.org/abs/2602.01886 https://arxiv.org/pdf/2602.01886 https://arxiv.org/html/2602.01886
arXiv:2602.01886v1 Announce Type: new
Abstract: We present a novel single-photon detector based on a vacuum tube incorporating a photocathode, a microchannel plate (MCP), and a Timepix4 CMOS ASIC functioning as a pixelated anode. Designed to handle photon rates up to 1 billion per second across a 7 cm$^2$ active area, the detector achieves outstanding spatial and temporal resolutions of 5-10 $\mu$m and below 50 ps r.m.s., respectively.
The Timepix4 ASIC comprises approximately 230,000 pixels, each integrating analog and digital front-end electronics. This enables data-driven acquisition and supports data transmission rates up to 160 Gb/s. External FPGA-based electronics manage both configuration and readout.
In order to test the timing performance of the Timepix4 ASIC we performed preliminary characterization of an assembly bonded to a 100 $\mu$m thick n-on-p silicon sensor using a pulsed infrared laser, which demonstrated a per-pixel timing resolution of 110 ps, with cluster-based averaging methods improving to below 50 ps.
Six prototype detectors incorporating different MCP stack configurations and end-spoiling depths were produced by Hamamatsu Photonics. We report on their characterization, including dark count rates, gain, and spatial and timing resolutions, assessed both in laboratory conditions and during a test-beam campaign at CERN's SPS facility.
toXiv_bot_toot

Static dc electric field orientation effects on two-photon Rydberg EIT
Rob Behary, William Torg, Mykhailo Vorobiov, Nicolas DeStefano, Adam Vernon, Charles T. Fancher, Neel Malvania, Eugeniy E. Mikhailov, Seth Aubin, Irina Novikova
https://arxiv.org/abs/2601.09676

Photon Spheres and shadow of Schwarzschild black hole on the EUP framework
Hai-Long Zhen, Jian-Hua Shi, Huai-Fan Li, Yu-Bo Ma
https://arxiv.org/abs/2603.03660 https://

A narrow-linewidth Brillouin laser for a two-photon rubidium frequency standard
Kyle W. Martin, River Beard, Andrei Isichenko, KaiKai Liu, Seth E. Erickson, Kaleb Campbell, Daniel J. Blumenthal, Sean Krzyzewski
https://arxiv.org/abs/2602.09364

CAGE: An Internal Source Scanning Cryostat for HPGe Characterization
G. Othman, C. Wiseman, T. H. Burritt, J. A. Detwiler, M. P. Held, R. Henning, T. Mathew, D. Peterson, W. Pettus, G. Song, T. D. Van Wechel
https://arxiv.org/abs/2602.06289 https://arxiv.org/pdf/2602.06289 https://arxiv.org/html/2602.06289
arXiv:2602.06289v1 Announce Type: new
Abstract: The success of current and future-generation neutrinoless double beta decay experiments relies on the ability to eliminate or reduce extraneous backgrounds. In addition to constructing experiments using radiopure materials and handling in underground laboratories, it is necessary to understand and reduce known backgrounds in data analysis. The Large Enriched Germanium Experiment for Neutrinoless double beta Decay is searching for this decay using 76Ge-enriched high-purity germanium detectors submerged in an active liquid argon veto. A significant background in LEGEND is surface events from shallowly-impinging radiation on detector surfaces. In this paper we introduce the Collimated Alphas, Gammas, and Electrons (CAGE) scanning system, an internal-source scanning vacuum cryostat, designed to perform studies of surface events on sensitive surfaces of HPGe in a surface-lab. CAGE features a collimated radionuclide source inside a movable infrared shield that is able to perform precision scans of detector surfaces by utilizing three independent motor stages for source positioning. This allows detailed studies of pulse shapes as a function of source position and incident angle, where defining features can be extracted and exploited for removing surface backgrounds in data analysis in LEGEND. In this paper, we describe CAGE and demonstrate its performance with a commissioning run with 241Am. The commissioning run was completed with the source at normal incidence, and we estimate a beam spot precision of 3.1 mm, which includes positioning uncertainties and the beam-spot size. Using the 59.5 keV gamma population from 241Am, we show that low-energy photon events near the passivated surface feature risetimes that increase with radial distance from the detector center. We suggest a specific metric that can be used to discriminate low-energy gamma backgrounds in LEGEND with similar characteristics.
toXiv_bot_toot

Two-photon-excited fluorescence spectroscopy of Rb atoms in a magneto-optical trap
Alan McLean, Christian Drago, Daniel Podos, Chengyi Luo, Caleb Brzezinski, Ting-Wei Hsu, John Sipe, Ralph Jimenez
https://arxiv.org/abs/2602.07161

Non-dipole effects in two-photon sweeping of the K-shell of an atomic ion
A. N. Hopersky, A. M. Nadolinsky, S. A. Novikov, R. V. Koneev
https://arxiv.org/abs/2603.07283 https://…

#StarTrek #StarfleetAcademy is #WOKE #WOKE #WOKE and its GREAT GREAT GREAT
I don't care what other people say
Just binged on all 3 of the first episodes and loved them! I had my doubts, but they were all photon torpedoed into loving the show.
Yeah, it’s about kids. But as they said, “It's a school”.
The show brings the core ideals and philosophy of Star Trek and makes them into excellent teachable moments.
Looking forward to the cast gelling as it always takes time for a new Star Trek to get its footing. But it’s pretty solid already. Love what Holly Hunter is doing with the chancellor/captain. Gina Yashere is totally amazing and can feel her joy in the roll in every scene she's in. And Tig Notaro is totally fabulously funny in a so dry sort of way. Also being partners with Gina's character is just perfect in being so unperfect.

Crosslisted article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Photon statistics in chiral waveguide QED: I Mean field and perturbative expansions
M. Eltohfa, F. Robicheaux

Geometric mechanisms enabling spin- and enantio-sensitive observables in one photon ionization of chiral molecules
Philip Caesar M. Flores, Stefanos Carlstr\"om, Serguei Patchkovskii, Misha Ivanov, Andres F. Ordonez, Olga Smirnova
https://arxiv.org/abs/2603.02735

Crosslisted article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Four- and six-photon stimulated Raman transitions for coherent qubit and qudit operations
Gregory, Ritchie, Quinn, Brudney, Wineland, Allcock, O'Reilly

Crosslisted article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- AI-Accelerated Qubit Readout at the Single-Photon Level for Scalable Atomic Quantum Processors
Zhou, Wang, Tian, Huang, Chen, Li, Xu, Chen, Shen