Tootfinder

Moir\'e-Polaritons in a Dark Bose-Einstein Condensate
Moroni Santiago-Garc\'ia, Shunashi G. Castillo-L\'opez, David A. Ruiz-Tijerina, Arturo Camacho-Guardian
https://arxiv.org/abs/2506.15083

Moiré-Polaritons in a Dark Bose-Einstein Condensate
Quantum mixtures of moiré excitons have arisen as a platform for realizing novel phases of light and matter. Here, we study moiré polaritons coupled to a Bose-Einstein condensate of dark-state excitons confined to a moiré superlattice. We develop a variational approach to analyze the optical response of the system and demonstrate that strong exciton-exciton interactions significantly modify the character of moiré polaritons, leading to sizable energy shifts of the avoided crossing between t…

Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection
Alexandra P. Klipfel, Peter Fisher, David I. Kaiser
https://arxiv.org/abs/2506.14041

Hawking Radiation Signatures from Primordial Black Holes Transiting the Inner Solar System: Prospects for Detection
Primordial black holes (PBHs) arise from the collapse of density perturbations in the early universe and serve as a dark matter (DM) candidate and a probe of fundamental physics. There remains an unconstrained ``asteroid-mass'' window where PBHs of masses $10^{17} {\rm g} \lesssim M \lesssim 10^{23} {\rm g}$ could comprise up to $100\%$ of the dark matter. Current $e^{\pm}$ Hawking radiation constraints on the DM fraction of PBHs are set by comparing observed spatial- and time-integrated cosmic…

Optimal T depth quantum circuits for implementing arbitrary Boolean functions
Suman Dutta, Anik Basu Bhaumik, Anupam Chattopadhyay, Subhamoy Maitra
https://arxiv.org/abs/2506.01542

Optimal T depth quantum circuits for implementing arbitrary Boolean functions
In this paper we present a generic construction to obtain an optimal T depth quantum circuit for any arbitrary $n$-input $m$-output Boolean function $f: \{0,1\}^n \rightarrow \{0,1\}^m$ having algebraic degree $k\leq n$, and it achieves an exact Toffoli (and T) depth of $\lceil \log_2 k \rceil$. This is a broader generalization of the recent result establishing the optimal Toffoli (and consequently T) depth for multi-controlled Toffoli decompositions (Dutta et al., Phys. Rev. A, 2025). We achie…

#Digitalsteuer für Datenkraken-Konzerne bzw. "Plattformsoli": Unisono kritisch äußerten sich die nicht wenigen deutschen Digitalwirtschaftsverbände. Sowohl beim eco-Verband als auch beiBitkom und BVDW zahlen die Google Germany GmbH und die Facebook Germany GmbH (bzw. Meta Platforms, Inc.) jeweils Mitgliedsbeiträge. An Lobby-Ausgaben sparen sie weder in Brüssel noch in Deutschland…

Kolumne: Das Altpapier am 3. Juni 2025 – Die Digitalsteuer-Debatte
... die der neue Kulturstaatsminister Weimer anzettelte, nimmt Fahrt auf. Digitalminister Wildberger legte auf zwei ausgesprochen unterschiedlichen Konferenzen erste Auftritte hin.

I'm supervising a group of six 3rd year BSc students in a project inspired by the paper "Responsibility Under Uncertainty: Which Climate Decisions Matter Most?" https://link.springer.com/article/10.1007/s10666-022-09867-w
The project description is availa…

I read "Then I Am Myself the World: What Consciousness Is and How to Expand It" by Christof Koch.
Interesting book which spends like 8 or 9 chapters detailing all the experiments which prove beyond much doubt that consciousness, and self awareness, is a thing done by a brain.
It describes how perception is a construction of a description, has a chapter called "computational mind"
And then spends the last two chapters describing why he thinks the mind can't be computed, because drugs have made him think experience is some kind of magic associated with highly interconnected causal structures.
Apparently, he thinks, once things become interconnected enough they become able to cause things independently of the physics running those connections.
Which is crazy, obviously. There's nothing causal in direct connections between neurons that isn't equally causal in modeled connections between virtual neurons.
All his evidence in the book from neural MRI scans to the effects of psychedelic drugs and symptoms of strokes and disease point to the brain simulating a virtual reality which is the basis of perception.
That simulated world in which we live is full of colour and shape and sounds and emotions and millions of mental constructs that are built to be correlated by the senses with the outside world, but are not equal to the world itself. We live in a dream constructed to correlate with reality.
But then instead of taking the next step: That consciousness itself is a property of a simulated being inside that mental model of the universe, a property which the brain simulates and applies to the virtual self that's doing the experiencing inside that model, he jumps towards some magic implying pan-psychism or that sufficiently interconnected networks become causally self-complete for some reason nobody can fathom.
Sure, colour and shape and emotions are all made up by the brain but experience can't be! For some reason.
You see in truth dualism is false, in that there is no spirit realm in which ghosts animate the matter of the body somehow.
Yet also, dualism is true, in that there is a simulated mental reality which we live in, computed by the brain in which all perception and experience are created, which is related-to but separate-from the unfolding complicated dance of energy that is the universe our bodies interact with.
People take some DMT trip, and the model of the universe emulated by their brain collapses and breaks. Their virtual simulated self inside their mind has these experiences of being one with the universe or the experience of feeling dead yet conscious or whatever, and these hippies think that the broken down simulated experience is real and reflects how consciousness is more fundamental than the atoms that make up the neurons in their brain.
Instead of realizing it shows them that their experienced universe is a simulacrum, they think they get a more direct experience of reality somehow. A consciousness more pure than any mere base atom.
"Then I am myself the world" is a great title. Everything you ever experience is created and simulated in your brain like a dream, the whole universe is inside your head. Even the fact of experience itself.
But that isn't the conclusion Koch reaches somehow, he just jumps from describing the evidence that this is so straight into ascribing super-causal magic consciousness to particular arrangements of atoms that integrated information theory suggest have high correlation, and thinks therefore conciousness is itself the entire universe.
Ah well, fun book. I like arguing in my head with authors that are wrong.
#reading #books #consciousness #thenIAmMyselfTheWorld

A limit on the mass of the Taurid Resonant Swarm at sub-100 meter sizes
Paul Wiegert, Denis Vida, David L. Clark, Auriane Egal, Richard Wainscoat, Robert Weryk
https://arxiv.org/abs/2506.03327

A limit on the mass of the Taurid Resonant Swarm at sub-100 meter sizes
We report on a pencil-beam survey of the Taurid Swarm, a possible concentration of bodies in the Taurid meteoroid stream associated with the 7:2 mean-motion resonance with Jupiter. Canada-France-Hawaii Telescope MegaCam observations reaching apparent magnitudes of 24.5 in the gri filter were taken over three nights. Rates of motion on the sky allowed for the quick elimination of main-belt objects from the over 1000 moving sources seen. Eight candidates with on-sky rates of motion consistent wit…

Mesoscopic Helices of Polar Domains in a Quadruple Perovskite
Yang Zhang, Mingyu Xu, Jie Li, Suk Hyun Sung, Sang-Wook Cheong, Weiwei Xie, Ismail El Baggari
https://arxiv.org/abs/2506.03048

Mesoscopic Helices of Polar Domains in a Quadruple Perovskite
A significant effort in condensed matter physics is dedicated to the search for exotic arrangements of electric dipoles. Beyond collinear alignments of electric dipoles, more complex arrangements analogous to magnetic spin textures, such as polar vortices and skyrmions, have been realized. Here we report atomic-scale visualizations of a candidate for helical texture of electric dipoles, the lightly doped quadruple perovskite BiCu$_{x}$Mn$_{7-x}$O$_{12}$. Rather than forming a continuous incomme…