Tootfinder

This https://arxiv.org/abs/2105.10028 has been replaced.
link: https://scholar.google.com/scholar?q=a

Escrows are optics
We provide a categorical interpretation for escrows, i.e. trading protocols in trustless environment, where the exchange between two agents is mediated by a third party where the buyer locks the money until they receive the goods they want from the seller. A simplified escrow system can be modeled as a certain kind of morphism in the category of optics on a monoidal category. When objects in the base category have monoid and comonoid structures, more involved kinds of escrows `with intermedia…

This https://arxiv.org/abs/2105.10028 has been replaced.
link: https://scholar.google.com/scholar?q=a

Escrows are optics
We provide a categorical interpretation for escrows, i.e. trading protocols in trustless environment, where the exchange between two agents is mediated by a third party where the buyer locks the money until they receive the goods they want from the seller. A simplified escrow system can be modeled as a certain kind of morphism in the category of optics on a monoidal category. When objects in the base category have monoid and comonoid structures, more involved kinds of escrows `with intermedia…

Laser cooling $^{88}$Sr to microkelvin temperature with an integrated-photonics system
Andrew R. Ferdinand, Zheng Luo, Sindhu Jammi, Zachary Newman, Grisha Spektor, Okan Koksal, Parth B. Patel, Daniel Sheredy, William Lunden, Akash Rakholia, Travis C. Briles, Wenqi Zhu, Martin M. Boyd, Amit Agrawal, Scott B. Papp
https://arxiv.org/abs/2404.13210 https://arxiv.org/pdf/2404.13210
arXiv:2404.13210v1 Announce Type: new
Abstract: We report on experiments generating a magneto-optical trap (MOT) of 88-strontium ($^{88}$Sr) atoms at microkelvin temperature, using integrated-photonics devices. With metasurface optics integrated on a fused-silica substrate, we generate six-beam, circularly polarized, counter-propagating MOTs on the blue broad-line, 461 nm, and red narrow-line, 689 nm, Sr cooling transitions without bulk optics. By use of a diverging beam configuration, we create up to 10 mm diameter MOT beams at the trapping location. To frequency stabilize and linewidth narrow the cooling lasers, we use fiber-packaged, integrated nonlinear waveguides to spectrally broaden a frequency comb. The ultra-coherent supercontinuum of the waveguides covers 650 nm to 2500 nm, enabling phase locks of the cooling lasers to hertz level linewidth. Our work highlights the possibility to simplify the preparation of an ultracold 88Sr gas for an optical-lattice clock with photonic devices. By implementing a timing sequence for control of the MOT lasers and the quadrupole magnetic-field gradient, we collect atoms directly from a thermal beam into the blue MOT and continuously cool into a red MOT with dynamic detuning and intensity control. There, the red MOT temperature is as low as $2~{\mu}$K and the overall transfer efficiency up to 16%. We characterize this sequence, including an intermediate red MOT with modulated detuning. Our experiments demonstrate an integrated photonics system capable of cooling alkaline-earth gases to microkelvin temperature with sufficient transfer efficiencies for adoption in scalable optical clocks and quantum sensors.

This https://arxiv.org/abs/2402.16839 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDL_…

When Science Locks In, Can AI Help?
Over the past century, the purpose of scientific practices has undergone a profound transformation, from an intellectual pursuit to a problem-solving enterprise, leading to an increasing risk of path dependency in scientific endeavors. Our research, analyzing 41 million research articles from the past six decades, emphasizes the concern of science lock-in by identifying and measuring two types of innovations in science: complementary and substitutive. Over the past six decades, the fraction of …

Laser cooling $^{88}$Sr to microkelvin temperature with an integrated-photonics system
Andrew R. Ferdinand, Zheng Luo, Sindhu Jammi, Zachary Newman, Grisha Spektor, Okan Koksal, Parth B. Patel, Daniel Sheredy, William Lunden, Akash Rakholia, Travis C. Briles, Wenqi Zhu, Martin M. Boyd, Amit Agrawal, Scott B. Papp
https://arxiv.org/abs/2404.13210 https://arxiv.org/pdf/2404.13210
arXiv:2404.13210v1 Announce Type: new
Abstract: We report on experiments generating a magneto-optical trap (MOT) of 88-strontium ($^{88}$Sr) atoms at microkelvin temperature, using integrated-photonics devices. With metasurface optics integrated on a fused-silica substrate, we generate six-beam, circularly polarized, counter-propagating MOTs on the blue broad-line, 461 nm, and red narrow-line, 689 nm, Sr cooling transitions without bulk optics. By use of a diverging beam configuration, we create up to 10 mm diameter MOT beams at the trapping location. To frequency stabilize and linewidth narrow the cooling lasers, we use fiber-packaged, integrated nonlinear waveguides to spectrally broaden a frequency comb. The ultra-coherent supercontinuum of the waveguides covers 650 nm to 2500 nm, enabling phase locks of the cooling lasers to hertz level linewidth. Our work highlights the possibility to simplify the preparation of an ultracold 88Sr gas for an optical-lattice clock with photonic devices. By implementing a timing sequence for control of the MOT lasers and the quadrupole magnetic-field gradient, we collect atoms directly from a thermal beam into the blue MOT and continuously cool into a red MOT with dynamic detuning and intensity control. There, the red MOT temperature is as low as $2~{\mu}$K and the overall transfer efficiency up to 16%. We characterize this sequence, including an intermediate red MOT with modulated detuning. Our experiments demonstrate an integrated photonics system capable of cooling alkaline-earth gases to microkelvin temperature with sufficient transfer efficiencies for adoption in scalable optical clocks and quantum sensors.

Age-Memory Trade-off in Read-Copy-Update
Vishakha Ramani, Jiachen Chen, Roy D. Yates
https://arxiv.org/abs/2402.06860 https://arxiv.o…

Age-Memory Trade-off in Read-Copy-Update
In the realm of shared memory systems, the challenge of reader-writer synchronization is closely coupled with the potential for readers to access outdated updates. Read-Copy-Update (RCU) is a synchronization primitive that allows for concurrent and non-blocking read access to fresh data. This is achieved through the creation of updated data copies, with each prior version retained until all associated read-locks are released. Given the principle that frequent updating keeps information fresh, t…

The intermittently-resonant coevolution of migrating planets and their pulsating stars
Jared Bryan, Julien de Wit, Meng Sun, Zoe L. de Beurs, Richard H. D. Townsend
https://arxiv.org/abs/2403.08014

The intermittently-resonant coevolution of migrating planets and their pulsating stars
Hot Jupiters are expected to form far from their host star and move toward close-in, circular orbits via a smooth, monotonic decay due to mild and constant tidal dissipation. Yet, three systems have recently been found exhibiting planet-induced stellar pulsations suggesting unexpectedly strong tidal interactions. Here we combine stellar evolution and tide models to show that dynamical tides raised by eccentric gas giants can give rise to chains of resonance locks with multiple modes, enriching …