Results 11 to 20 of about 4,846,198 (334)
Hillclimbing saddle point inflation
Physics Letters B, 2018 Recently a new inflationary scenario was proposed in [1] which can be applicable to an inflaton having multiple vacua. In this letter, we consider a more general situation where the inflaton potential has a (UV) saddle point around the Planck scale. This
Kiyoharu Kawana, Katsuta Sakai
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Saddle-point scrambling without thermalization [PDF]
Physical Review A, 2021 Out-of-time-order correlators (OTOCs) have proven to be a useful tool for studying thermalization in quantum systems. In particular, the exponential growth of OTOCS, or scrambling, is sometimes taken as an indicator of chaos in quantum systems, despite ...
R. Kidd, A. Safavi-Naini, J. Corney
semanticscholar +6 more sources
Saddle point localization of molecular wavefunctions. [PDF]
Sci Rep, 2016 AbstractThe quantum mechanical description of isomerization is based on bound eigenstates of the molecular potential energy surface. For the near-minimum regions there is a textbook-based relationship between the potential and eigenenergies. Here we show how the saddle point region that connects the two minima is encoded in the eigenstates of the model
Mellau GCh +4 more
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On the Recursive Saddle Point Method [PDF]
SSRN Electronic Journal, 2004 In this paper a simple dynamic optimization problem is solved with the help of the recursive saddle point method developed by Marcet and Marimon (1999). According to Marcet and Marimon, their technique should yield a full characterization of the set of solutions for this problem.
Matthias Messner, Nicola Pavoni
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Saddle-Point Dynamics: Conditions for Asymptotic Stability of Saddle Points [PDF]
SIAM Journal on Control and Optimization, 2017 26 pages, To appear in SIAM Journal on Control and ...
Jorge E. Cortes +2 more
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Leakage threshold of a saddle point
Tribology Letters, 2022 Abstract The threshold condition for leakage inception is of great interest to many engineering applications, and it is essential for seal design. In the current study, the leakage threshold is studied by means of a numerical method for a mechanical contact problem between an elastic bisinusoidal surface and a rigid flat surface.
Huang, De +3 more
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Accelerated Stochastic Algorithms for Convex-Concave Saddle-Point Problems
Mathematics of Operations Research, 2021 We develop stochastic first-order primal-dual algorithms to solve a class of convex-concave saddle-point problems. When the saddle function is strongly convex in the primal variable, we develop the first stochastic restart scheme for this problem.
Renbo Zhao
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Distributed saddle point problems: lower bounds, near-optimal and robust algorithms* [PDF]
Optimization Methods and Software, 2020 This paper focuses on the distributed optimization of stochastic saddle point problems. The first part of the paper is devoted to lower bounds for the centralized and decentralized distributed methods for smooth (strongly) convex-(strongly) concave ...
Aleksandr Beznosikov +2 more
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Exact QFT duals of AdS black holes
Journal of High Energy Physics, 2023 We construct large N saddle points of the matrix model for the N $$ \mathcal{N} $$ = 4 Yang- Mills index dual to the BPS black holes in AdS 5 × S 5, in two different setups.
Sunjin Choi +3 more
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Zeroth-Order Algorithms for Smooth Saddle-Point Problems [PDF]
Communications in Computer and Information Science, 2020 In recent years, the importance of saddle-point problems in machine learning has increased. This is due to the popularity of GANs. In this paper, we solve stochastic smooth (strongly) convex-concave saddle-point problems using zeroth-order oracles ...
Abdurakhmon Sadiev +3 more
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