LAUSR

Effective Hamiltonians and Lagrangians for Conditioned Markov Processes at Large Volume

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1 Published in 2022 at "Journal of Statistical Physics"

DOI: 10.1007/s10955-022-02898-3

Abstract: When analysing statistical systems or stochastic processes, it is often interesting to ask how they behave given that some observable takes some prescribed value. This conditioning problem is well understood within the linear operator formalism… read more here.

Keywords: large volume; markov processes; effective hamiltonians; hamiltonians lagrangians ... See more keywords

Effective Hamiltonians in surfaces of thin quantum waveguides

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0 Published in 2019 at "Journal of Mathematical Physics"

DOI: 10.1063/1.5063804

Abstract: Effective operators for the Laplacian in surfaces of three-dimensional waveguides are investigated as their diameters vanish. read more here.

Keywords: effective hamiltonians; thin quantum; quantum waveguides; surfaces thin ... See more keywords

Coupled Cluster Green's function formulations based on the effective Hamiltonians

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1 Published in 2019 at "Molecular Physics"

DOI: 10.1080/00268976.2020.1725669

Abstract: We demonstrate that the effective Hamiltonians obtained with the downfolding procedure based on double unitary coupled cluster (DUCC) ansatz can be used in the context of Green's function coupled cluster (GFCC) formalism to calculate spectral… read more here.

Keywords: green function; effective hamiltonians; cluster green; coupled cluster ... See more keywords

Effective Hamiltonians in the quantum Rabi problem

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2 Published in 2022 at "Physical Review A"

DOI: 10.1103/physreva.105.023704

Abstract: Abstract We revisit the theoretical description of the ultrastrong light-matter interaction in terms of exactly solvable effective Hamiltonians. A perturbative approach based on polaronic and spindependent squeezing transformations provides an effective Hamiltonian for the quantum… read more here.

Keywords: model; quantum rabi; hamiltonians quantum; rabi problem ... See more keywords

Scale Invariant Effective Hamiltonians for a Graph with a Small Compact Core

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1 Published in 2019 at "Symmetry"

DOI: 10.3390/sym11030359

Abstract: We consider a compact metric graph of size ε and attach to it several edges (leads) of length of order one (or of infinite length). As ε goes to zero, the graph G ε obtained… read more here.

Keywords: invariant effective; effective hamiltonians; scale invariant; hamiltonians graph ... See more keywords