Tootfinder

Back from a #cycling loop around the #ammersee !
Unfortunately I forgot to turn on my cycling computer for the first half hour 🥴 Yeah well, the red frame around the statistics page was quite clear but .. well.
Anyways! It was a nice ~50km loop with excellent weather (prepared with a lo…

Explicit C*-algebraic Protocol for Exact Universal Embezzlement of Entanglement
Li Liu
https://arxiv.org/abs/2506.10736 https://arxiv…

Explicit C*-algebraic Protocol for Exact Universal Embezzlement of Entanglement
We present an explicit construction of a universal embezzlement protocol in the C*-algebraic model of quantum information, that is equivalent to the commuting operator model. Our protocol enables exact embezzlement of arbitrary bipartite pure states using a single, fixed catalyst state. Unlike prior constructions that achieve only approximate embezzlement or require state-dependent catalysts, our approach is both exact and state-independent. The construction is explicit, based on simple *-autom…

Robust output stability and input-to-output stability based on output dissipation
Antoine Chaillet (IUF, L2S), Iasson Karafyllis (NTUA), Yuan Wang
https://arxiv.org/abs/2506.10479

Robust output stability and input-to-output stability based on output dissipation
LaSalle techniques to ensure the convergence of a given output usually fail at guaranteeing uniform convergence time, which induces robustness issues. Recent works have provided extra conditions under which a Lyapunov function that dissipates in terms of only the output guarantees this uniformity. In this paper, we extend these results to systems with inputs in order to establish either robust stability or input-to-output stability. In addition, we show that a recent relaxation of Barb__lat's l…

Torus knots in adjoint representation and Vogel's universality
Liudmila Bishler, Andrei Mironov
https://arxiv.org/abs/2506.06219 https://

Torus knots in adjoint representation and Vogel's universality
Vogel's universality gives a unified description of the adjoint sector of representation theory for simple Lie algebras in terms of three parameters $α,β,γ$, which are homogeneous coordinates of Vogel's plane. It is associated with representation theory within the framework of Chern-Simons theory only, and gives rise to universal knot invariants. We extend the list of these latter further, and explain how to deal with the adjoint invariants for the torus knots $T[m,n]$ considering the case o…

Phonon- and magnon-mediated decoherence of a magnonic qubit
Vemund Falch, Arne Brataas, Jeroen Danon
https://arxiv.org/abs/2506.08823 https://

Phonon- and magnon-mediated decoherence of a magnonic qubit
We investigate the decoherence of magnonic qubits in small ferromagnetic insulators and compute the relaxation and dephasing rates due to magnon-phonon and magnon-magnon interactions. We combine a Bloch--Redfield description with Keldysh non-equilibrium field theory to find explicit expressions for the rates. For a quadratic dispersion and assuming a uniform mode defines the qubit, we find that decay into two phonons is the only allowed relaxation process at zero temperature. The low resonance …

A necessary condition for liftings of positive characteristic varieties with finite fundamental groups
Ruida Di, Runjie Hu, Siqing Zhang
https://arxiv.org/abs/2506.07914

A necessary condition for liftings of positive characteristic varieties with finite fundamental groups
In this paper, we introduce a necessary condition for the existence of characteristic zero liftings of certain smooth, proper varieties in positive characteristic, using étale homotopy theory and Wall's finiteness obstruction. For a variety with finite étale fundamental group pi, we define a notion of mod-l finite dominatedness based on the F_l-chain complex of the universal cover of its l-profinite étale homotopy type. We prove that such a variety can be lifted to characteristic zero only i…

Universal Mass Equation for Equal-Quantum Excited-States Sets II
L. David Roper (VTech), Igor Strakovsky (GWU)
https://arxiv.org/abs/2506.06496 https://

Universal Mass Equation for Equal-Quantum Excited-States Sets II
We extend our recent study of the universal mass equation for equal-quantum excited-states sets reported by Roper and Strakovsky~\cite{Roper:2024ovj}. The masses of twelve baryon sets and sixteen meson sets, with only two equal-quantum excited states in each set, using Breit-Wigner PDG2024 masses and their uncertainties at fixed $J^P$ for baryons and $J^{PC}$ for mesons, are fitted by a simple one-parameter logarithmic function, $M_n = αLn(n) + M_1$, where $n$ is the level of radial excitation…

Not sure if those work with a prepaid sim card on a modem (nor if it’s legal to setup such an answering machine on one of them here), but I’ll do some research on it
As for voip numbers, no idea how those work and if they’re universal or if I have to get one from a provider explicitly made for Asterisk compatibility, but they seem quite expensive (specially since the prepaid ones would be basically free since it’s only for receiving calls from nerds, not making calls) anyway.

SpeechVerifier: Robust Acoustic Fingerprint against Tampering Attacks via Watermarking
Lingfeng Yao (University of Houston), Chenpei Huang (University of Houston), Shengyao Wang (Waseda University), Junpei Xue (Waseda University), Hanqing Guo (University of Hawaii at M\=anoa), Jiang Liu (Waseda University), Xun Chen (Independent Researcher), Miao Pan (University of Houston)

SpeechVerifier: Robust Acoustic Fingerprint against Tampering Attacks via Watermarking
With the surge of social media, maliciously tampered public speeches, especially those from influential figures, have seriously affected social stability and public trust. Existing speech tampering detection methods remain insufficient: they either rely on external reference data or fail to be both sensitive to attacks and robust to benign operations, such as compression and resampling. To tackle these challenges, we introduce SpeechVerifer to proactively verify speech integrity using only the …

Deep reinforcement learning for near-deterministic preparation of cubic- and quartic-phase gates in photonic quantum computing
Amanuel Anteneh L\'eandre Brunel, Carlos Gonz\'alez-Arciniegas, Olivier Pfister
https://arxiv.org/abs/2506.07859

Deep reinforcement learning for near-deterministic preparation of cubic- and quartic-phase gates in photonic quantum computing
Cubic-phase states are a sufficient resource for universal quantum computing over continuous variables. We present results from numerical experiments in which deep neural networks are trained via reinforcement learning to control a quantum optical circuit for generating cubic-phase states, with an average success rate of 96%. The only non-Gaussian resource required is photon-number-resolving measurements. We also show that the exact same resources enable the direct generation of a quartic-phase…