Results 51 to 60 of about 7,625,136 (322)

Multireference Perturbation Theory with Cholesky Decomposition for the Density Matrix Renormalization Group [PDF]

Journal of Chemical Theory and Computation, 2016
We present a second-order N-electron valence state perturbation theory (NEVPT2) based on a density matrix renormalization group (DMRG) reference wave function that exploits a Cholesky decomposition of the two-electron repulsion integrals (CD-DMRG-NEVPT2).
Leon Freitag, S. Knecht, C. Angeli, M. Reiher   +3 more
semanticscholar   +1 more source

Density-functional perturbation theory goes time-dependent

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2008
The scope of time-dependent density-functional theory (TDDFT) is limited to the lowest portion of the spectrum of rather small systems (a few tens of atoms at most).
Gebauer, Ralph, Rocca, Dario, Baroni, Stefano   +2 more
doaj   +1 more source

Post-Wick theorems for symbolic manipulation of second-quantized expressions in atomic many-body perturbation theory [PDF]

, 2009
Manipulating expressions in many-body perturbation theory becomes unwieldily with increasing order of the perturbation theory. Here I derive a set of theorems for efficient simplification of such expressions.
Andrei Derevianko, Fetter A L, Fritzsche S, Lindgren I, Szabo A, Veltman M Williams D N   +5 more
core   +1 more source

Time-sliced perturbation theory II: baryon acoustic oscillations and infrared resummation [PDF]

, 2016
We use time-sliced perturbation theory (TSPT) to give an accurate description of the infrared non-linear effects affecting the baryonic acoustic oscillations (BAO) present in the distribution of matter at very large scales. In TSPT this can be done via a
D. Blas, M. Garny, M. Ivanov, S. Sibiryakov   +3 more
semanticscholar   +1 more source

BPS multi-vortices in chiral perturbation theory [PDF]

EPJ Web of Conferences
We show that a BPS bound can be derived from chiral perturbation theory minimally coupled to electrodynamics at a finite isospin chemical potential.
Vera Aldo
doaj   +1 more source

Large Spin Perturbation Theory for Conformal Field Theories. [PDF]

Physical Review Letters, 2016
We consider conformal field theories around points of large twist degeneracy. Examples of this are theories with weakly broken higher spin symmetry and perturbations around generalized free fields.
L. Alday
semanticscholar   +1 more source

On some bounds on the perturbation of invariant subspaces of normal matrices with application to a graph connection problem

Journal of Inequalities and Applications, 2022
We provide upper bounds on the perturbation of invariant subspaces of normal matrices measured using a metric on the space of vector subspaces of C n $\mathbb{C}^{n}$ in terms of the spectrum of both unperturbed and perturbed matrices as well as the ...
Subhrajit Bhattacharya
doaj   +1 more source

Generalized Supersymmetric Perturbation Theory

, 2004
Using the basic ingredient of supersymmetry, we develop a simple alternative approach to perturbation theory in one-dimensional non-relativistic quantum mechanics.
Au C K, Au C K, B Gönül, Dalgarno A, Dobrovolska I V, Imbo T, Junker G, Kim I W, Lee C, Mavromatis H A, Mavromatis H A, Mavromatis H A, Nicolai H, Schwartz C, Schwartz C   +14 more
core   +2 more sources

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Four-Dimensional Spin Foam Perturbation Theory

Symmetry, Integrability and Geometry: Methods and Applications, 2011
We define a four-dimensional spin-foam perturbation theory for the BF-theory with a B∧B potential term defined for a compact semi-simple Lie group G on a compact orientable 4-manifold M.
João Faria Martins, Aleksandar Mikovic
doaj   +1 more source