Tootfinder

VR-Hit "Beat Saber" stellt PlayStation-Support ein und schaltet Multiplayer ab
Ab Mitte 2025 wird der VR-Bestseller "Beat Saber" keine neuen Inhalte mehr auf PSVR und PSVR2 erhalten – auch der Multiplayer wird eingestellt.

🇺🇦 #NowPlaying on KEXP's #ElSonido
molotov:
🎵 gimme tha power
#molotov
https://djmiguesoria.bandcamp.com/track/molotov-x-gorillaz-gimme-tha-power-nastyshup-86-bpm
https://open.spotify.com/track/6FY8Imjs6YSglIAqnbU9mM

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…

A non-commutative algorithm for multiplying 4x4 matrices using 48 non-complex multiplications
Jean-Guillaume Dumas (UGA, LJK, CASC), Cl\'ement Pernet, Alexandre Sedoglavic
https://arxiv.org/abs/2506.13242

A non-commutative algorithm for multiplying 4x4 matrices using 48 non-complex multiplications
The quest for non-commutative matrix multiplication algorithms in small dimensions has seen a lot of recent improvements recently. In particular, the number of scalar multiplications required to multiply two $4\times4$ matrices was first reduced in \cite{Fawzi:2022aa} from 49 (two recursion levels of Strassen's algorithm) to 47 but only in characteristic 2 or more recently to 48 in\cite{alphaevolve} but over complex numbers. We propose an algorithm in 48 multiplications with only rational coeff…

Bounded Exponential Sums with Multiplicative Coefficients
Ihor Pylaiev, Fred Tyrrell
https://arxiv.org/abs/2506.12845 https://arxiv.o…

Bounded Exponential Sums with Multiplicative Coefficients
We investigate when the exponential sum $\sum_{n \leq x}f(n)e^{2 πi n α}$ is bounded, for a multiplicative function $f$ and $α\in \mathbb{R}$. We show that under certain natural assumptions, this exponential sum is bounded only when $f$ closely resembles a periodic function. For completely multiplicative functions or those taking only finitely many values, we obtain sharper classification results, including a full classification (up to a measure-zero set of $α$) in the completely multiplica…

Pinching-Antenna Systems (PASS) Meet Multiple Access: NOMA or OMA?
Qiao Ren, Xidong Mu, Siyu Lin, Yuanwei Liu
https://arxiv.org/abs/2506.13490 https://

Pinching-Antenna Systems (PASS) Meet Multiple Access: NOMA or OMA?
A fundamental two-user PASS-based communication system is considered under three MA schemes, namely non-orthogonal multiple access (NOMA), frequency division multiple access (FDMA), and time division multiple access (TDMA). For each MA scheme, a pinching beamforming optimization problem is formulated to minimize the required transmit power for satisfying users' rate requirements. For NOMA and FDMA, a two-stage algorithm is proposed, where the locations of PAs are derived sequentially by using t…

Thermodynamics of multiple Maxwell demons
Sandipan Dutta
https://arxiv.org/abs/2506.12159 https://arxiv.org/pdf/2506.12159

Thermodynamics of multiple Maxwell demons
In many assembly line processes like metabolic and signaling networks in biological systems, the products of the first enzyme is the reactant for the next enzyme in the network. Working of multiple machines leads to efficient utilization of resources. Motivated by this, we investigate if multiple Maxwell demons lead to more efficient information processing. We study the phase space of multiple demons acting on an information tape based on the model of Mandal and Jarzynski [1, 2]. Their model is…

SIC-Free Rate-Splitting Multiple Access: Constellation-Constrained Optimization and Application to Large-Scale Systems
Sibo Zhang, Bruno Clerckx, David Vargas
https://arxiv.org/abs/2506.12668

SIC-Free Rate-Splitting Multiple Access: Constellation-Constrained Optimization and Application to Large-Scale Systems
Rate-Splitting Multiple Access (RSMA) has been recognized as a promising multiple access technique for future wireless communication systems. Recent research demonstrates that RSMA can maintain its superiority without relying on Successive Interference Cancellation (SIC) receivers. In practical systems, SIC-free receivers are more attractive than SIC receivers because of their low complexity and latency. This paper evaluates the theoretical limits of RSMA with and without SIC receivers under fi…

Lagrange multiplier expressions for matrix polynomial optimization and tight relaxations
Lei Huang, Jiawang Nie, Jiajia Wang, Lingling Xie
https://arxiv.org/abs/2506.12579

Lagrange multiplier expressions for matrix polynomial optimization and tight relaxations
This paper studies matrix constrained polynomial optimization. We investigate how to get explicit expressions for Lagrange multiplier matrices from the first order optimality conditions. The existence of these expressions can be shown under the nondegeneracy condition. Using Lagrange multiplier matrix expressions, we propose a strengthened Moment-SOS hierarchy for solving matrix polynomial optimization. Under some general assumptions, we show that this strengthened hierarchy is tight, or equiva…

DoA Estimation using MUSIC with Range/Doppler Multiplexing for MIMO-OFDM Radar
Murat Babek Salman, Emil Bj\"ornson
https://arxiv.org/abs/2506.13258 ht…

DoA Estimation using MUSIC with Range/Doppler Multiplexing for MIMO-OFDM Radar
Sensing emerges as a critical challenge in 6G networks, which require simultaneous communication and target sensing capabilities. State-of-the-art super-resolution techniques for the direction of arrival (DoA) estimation encounter significant performance limitations when the number of targets exceeds antenna array dimensions. This paper introduces a novel sensing parameter estimation algorithm for orthogonal frequency-division multiplexing (OFDM) multiple-input multiple-output (MIMO) radar syst…