Institution
École Polytechnique
Education•Palaiseau, France•
About: École Polytechnique is a education organization based out in Palaiseau, France. It is known for research contribution in the topics: Laser & Plasma. The organization has 18995 authors who have published 39265 publications receiving 1225163 citations. The organization is also known as: Ecole Polytechnique & Polytechnique.
Topics: Laser, Plasma, Electron, Population, Nonlinear system
Papers published on a yearly basis
Papers
More filters
Book•
01 Jan 1989TL;DR: In this paper, the existence theorem for non-quasiconvex Integrands in the Scalar case has been established in the Vectorial case, where the objective function is to find the minimum of the minimum for a non-convex function.
Abstract: Introduction.- Convex Analysis and the Scalar Case.- Convex Sets and Convex Functions.- Lower Semicontinuity and Existence Theorems.- The one Dimensional Case.- Quasiconvex Analysis and the Vectorial Case.- Polyconvex, Quasiconvex and Rank one Convex Functions.- Polyconvex, Quasiconvex and Rank one Convex Envelopes.- Polyconvex, Quasiconvex and Rank one Convex Sets.- Lower Semi Continuity and Existence Theorems in the Vectorial Case.- Relaxation and Non Convex Problems.- Relaxation Theorems.- Implicit Partial Differential Equations.- Existence of Minima for Non Quasiconvex Integrands.- Miscellaneous.- Function Spaces.- Singular Values.- Some Underdetermined Partial Differential Equations.- Extension of Lipschitz Functions on Banach Spaces.- Bibliography.- Index.- Notations.
2,250 citations
TL;DR: A new numerical method based on a combination of the classical shape derivative and of the level-set method for front propagation, which can easily handle topology changes and is strongly dependent on the initial guess.
2,176 citations
TL;DR: It is found that the harmonics are locked in phase and form a train of 250-attosecond pulses in the time domain, suggesting that Harmonic generation may be a promising source for attosecond time-resolved measurements.
Abstract: In principle, the temporal beating of superposed high harmonics obtained by focusing a femtosecond laser pulse in a gas jet can produce a train of very short intensity spikes, depending on the relative phases of the harmonics. We present a method to measure such phases through two-photon, two-color photoionization. We found that the harmonics are locked in phase and form a train of 250-attosecond pulses in the time domain. Harmonic generation may be a promising source for attosecond time-resolved measurements.
2,051 citations
01 Jan 1977
2,004 citations
TL;DR: In this article, a review of the basic ideas and techniques of spectral density functional theory which are currently used in electronic structure calculations of strongly correlated materials where the one-dimensional electron description breaks down is presented.
Abstract: We present a review of the basic ideas and techniques of the spectral density functional theory which are currently used in electronic structure calculations of strongly{correlated materials where the one{electron description breaks down. We illustrate the method with several examples where interactions play a dominant role: systems near metal{insulator transition, systems near volume collapse transition, and systems with local moments.
1,921 citations
Authors
Showing all 19056 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Michael Grätzel | 248 | 1423 | 303599 |
| Jing Wang | 184 | 4046 | 202769 |
| David L. Kaplan | 177 | 1944 | 146082 |
| Lorenzo Bianchini | 152 | 1516 | 106970 |
| David D'Enterria | 150 | 1592 | 116210 |
| Vivek Sharma | 150 | 3030 | 136228 |
| Melody A. Swartz | 148 | 1304 | 103753 |
| Edward G. Lakatta | 146 | 858 | 88637 |
| Carlo Rovelli | 146 | 1502 | 103550 |
| Marc Besancon | 143 | 1799 | 106869 |
| Maksym Titov | 139 | 1573 | 128335 |
| Jean-Paul Kneib | 138 | 805 | 89287 |
| Yves Sirois | 137 | 1334 | 95714 |
| Maria Spiropulu | 135 | 1455 | 96674 |
| Shaik M. Zakeeruddin | 133 | 453 | 76010 |