Tootfinder

Logarithmic Depth Decomposition of Approximate Multi-Controlled Single-Qubit Gates Without Ancilla Qubits
Jefferson D. S. Silva, Adenilton J. da Silva
https://arxiv.org/abs/2507.00400

Logarithmic Depth Decomposition of Approximate Multi-Controlled Single-Qubit Gates Without Ancilla Qubits
The synthesis of quantum operators involves decomposing general quantum gates into the gate set supported by a given quantum device. Multi-controlled gates are essential components in this process. In this work, we present improved decompositions of multi-controlled NOT gates with logarithmic depth using a single ancilla qubit, while also reducing the constant factors in the circuit depth compared to previous work. We optimize a previously proposed decomposition of multi-target, multi-controlle…

Efficient Tensor Decomposition via Moment Matrix Extension
Bobby Shi, Julia Lindberg, Joe Kileel
https://arxiv.org/abs/2506.22564 https://

Efficient Tensor Decomposition via Moment Matrix Extension
Motivated by a flurry of recent work on efficient tensor decomposition algorithms, we show that the celebrated moment matrix extension algorithm of Brachat, Comon, Mourrain, and Tsigaridas for symmetric tensor canonical polyadic (CP) decomposition can be made efficient under the right conditions. We first show that the crucial property determining the complexity of the algorithm is the regularity of a target decomposition. This allows us to reduce the complexity of the vanilla algorithm, while …

Multiplicative self-decomposition of the exponential and gamma distributions
Jos\'e Lu\'is da Silva, Mohamed Erraoui
https://arxiv.org/abs/2507.23467 https://

Multiplicative self-decomposition of the exponential and gamma distributions
Multiplicative self-decomposable laws describe random variables that can be decomposed into a product of a scaled-down version of themselves and an independent residual term. Shanbhag et al.~(1977) have shown that the gamma distribution is multiplicative self-decomposable (in particular, the exponential distribution). As a result, they established the multiplicative self-decomposability of the absolute value of a centered normal random variable. A limitation of Shanbhag's result is that the dis…

Decomposition of general grain boundaries
Wei Wan, Junwen Deng, Changxin Tang
https://arxiv.org/abs/2507.00759 https://arxiv.org/pdf/…

Decomposition of general grain boundaries
As a central part of microstructure evolution, grain boundary (GB) migration is believed to be both monolithic and unidirectional. But here, we introduce the concept of GB decomposition: one GB separates into two new GBs by controlling the Peach-Koehler forces on its disconnections. Molecular dynamics simulation is used to reveal the disconnection mechanisms and direction-dependent motion behaviors associated with the reversible decomposition of a nickel Σ7 general GB. We also observed a decom…

On the minimality of pancake decomposition of surface germs
Davi Lopes Medeiros, Euripedes Carvalho da Silva, Emanoel Souza
https://arxiv.org/abs/2505.23976

On the minimality of pancake decomposition of surface germs
The abnormal surfaces called snakes and circular snakes, defined in \cite{GabrielovSouza}, are special types of surface germs capturing the outer Lipschitz phenomena relevant to the outer classification problem. We provide algorithms to obtain a minimal pancake decomposition, i.e., where the number of pancakes is minimal, for snakes and circular snakes. We call a pancake decomposition obtained from our algorithm a greedy pancake decomposition. We also prove that greedy pancake decompositions of…

CFP> International Journal of Buddhist Thought & Culture Vol. 35 No. 2 (December 2025) https://networks.h-net.org/group/announcements/20121316/international-journal-buddhist-thought-culture-vol-35-no-2-december

Repeated warnings of AI-driven layoffs is fueling anxiety among workers, who report feeling pressured to accept pay cuts or worse conditions to keep their jobs (Anne Lutz Fernandez/Nobody Wants This)
https://nobody-wants-this.ghost.io/ai-is-already-disemp…

AI is Already Disempowering Workers Through Hype
Workers and students are being prepped for less power in the workplace

🇺🇦 #NowPlaying on KEXP's #MechanicalBreakdown
DSM-V:
🎵 Your Armour
#DSMV
https://d-s-m-v.bandcamp.com/track/your-armour

Kann Satire die Realität noch überzeichnen? #trump #dknp https://www…

"Rennt nicht in gerader Linie": US-Präsident Donald Trump verspottet Migranten in "Alligator Alcatraz"
US-Präsident Trump hat angekündigt, Migranten massenhaft abzuschieben. An der Südspitze Floridas errichtet die US-Regierung nun innerhalb von Tagen ein Gefängnis mitten im Sumpf. Bis zu 5000 Menschen sollen dort unterkommen. Es wird nicht das einzige neue Lager bleiben.

Effectiveness of the DEJAMPS purification protocol in noisy entangled photon systems, a Monte Carlo simulation
Vasilis Skarlatos, Nikos Konofaos
https://arxiv.org/abs/2506.22830

Effectiveness of the DEJAMPS purification protocol in noisy entangled photon systems, a Monte Carlo simulation
Entanglement purification is a critical enabling technology for quantum communication, allowing high-fidelity entangled pairs to be distilled from noisy resources. We present a comprehensive Monte Carlo study of the DEJMPS purification protocol applied to polarization-entangled photon pairs subject to both amplitude-damping noise (gamma) and dephasing noise (p). By sweeping (gamma, p) over a two-dimensional grid and performing repeated stochastic trials, we map out the average fidelity and aver…