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pro vyhledávání: '"Pavel' P"'
We extend the standard semiclassical theory of Exited-State Quantum Phase Transitions (ESQPTs), based on a classification of stationary points in the classical Hamiltonian, to constrained systems. We adopt the method of Lagrange multipliers to find a
Externí odkaz:
http://arxiv.org/abs/2412.04240
Autor:
Kalachev, Gleb, Panteleev, Pavel
We investigate the coboundary expansion property of product codes called product expansion, which plays an important role in the recent constructions of good quantum LDPC codes and classical locally testable codes. Prior research revealed that this p
Externí odkaz:
http://arxiv.org/abs/2501.01411
Given a group G and positive integers k,n, we let B_n=B_n(G) denote the set of all elements x in G such that |x^G|\leq n, and we say that G satisfies the (k,n)-covering condition for commutators if there is a subset S in G such that |S|\leq k and all
Externí odkaz:
http://arxiv.org/abs/2501.01360
Autor:
Marton, Pavel, Paściak, Marek, Gonçalves, Mauro, Novák, Ondřej, Hlinka, Jiří, Beanland, Richard, Alexe, Marin
Domain structures play a crucial role in the electric, mechanical and other properties of ferroelectric materials. In this study, we uncover the physical origins of the enigmatic zigzag domain structure in the prototypical multiferroic material BiFeO
Externí odkaz:
http://arxiv.org/abs/2501.01190
We consider a periodic quantum graph in the form of a rectangular lattice with the $\delta$-coupling of strength $\gamma$ in the vertices perturbed by changing the latter at an infinite straight array of vertices to a $\widetilde\gamma\ne\gamma$. We
Externí odkaz:
http://arxiv.org/abs/2412.20919
Wireless radio frequency coils provide a promising solution for clinical MR applications due to several benefits, such as cable-free connection and compatibility with MR platforms of different vendors. Namely, for the purpose of clinical high-field h
Externí odkaz:
http://arxiv.org/abs/2412.20625
Transformers with causal attention can solve tasks that require positional information without using positional encodings. In this work, we propose and investigate a new hypothesis about how positional information can be stored without using explicit
Externí odkaz:
http://arxiv.org/abs/2501.00073
For molecules and solids, we developed efficient MPI-parallel algorithms for evaluating the second-order exchange term with bare, statically screened, and dynamically screened interactions. We employ the resulting term in a fully self-consistent mann
Externí odkaz:
http://arxiv.org/abs/2412.18829
Optimization-based (OB) alternatives to traditional flux limiters couch preservation of properties such as local bounds and maximum principles into optimization problems, which impose these properties through inequality constraints. In this paper, we
Externí odkaz:
http://arxiv.org/abs/2412.18685
Autor:
Schröer, Saskia Laura, Apruzzese, Giovanni, Human, Soheil, Laskov, Pavel, Anderson, Hyrum S., Bernroider, Edward W. N., Fass, Aurore, Nassi, Ben, Rimmer, Vera, Roli, Fabio, Salam, Samer, Shen, Ashley, Sunyaev, Ali, Wadwha-Brown, Tim, Wagner, Isabel, Wang, Gang
Our society increasingly benefits from Artificial Intelligence (AI). Unfortunately, more and more evidence shows that AI is also used for offensive purposes. Prior works have revealed various examples of use cases in which the deployment of AI can le
Externí odkaz:
http://arxiv.org/abs/2412.18442