Carlos Marante
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View article: Influence of final state interactions in attosecond photoelectron interferometry
Influence of final state interactions in attosecond photoelectron interferometry Open
Fano resonances are ubiquitous phenomena appearing in many fields of physics, e.g., atomic or molecular photoionization, or electron transport in quantum dots. Recently, attosecond interferometric techniques have been used to measure the a…
View article: Two-electron interference in two-photon attosecond double ionization of neon
Two-electron interference in two-photon attosecond double ionization of neon Open
The pump-probe experiments enabled by x-ray free-electron lasers (XFEL) will allow us to directly observe correlated electronic motion with attosecond time resolution by detecting photoelectron pairs in coincidence. In helium, the transiti…
View article: The influence of final state interactions in attosecond photoelectron interferometry
The influence of final state interactions in attosecond photoelectron interferometry Open
Fano resonances are ubiquitous phenomena appearing in many fields of physics, e.g. atomic or molecular photoionization, or electron transport in quantum dots. Recently, attosecond interferometric techniques have been used to measure the am…
View article: Two-electron interference in two-photon attosecond double ionization of neon
Two-electron interference in two-photon attosecond double ionization of neon Open
The pump-probe experiments enabled by X-ray free-electron lasers (XFEL) will allow us to directly observe correlated electronic motion with attosecond time resolution by detecting photoelectron pairs in coincidence. In helium, the transiti…
View article: ASTRA, A Transition Density Matrix Approach to the Interaction of Attosecond Radiation with Atoms and Molecules
ASTRA, A Transition Density Matrix Approach to the Interaction of Attosecond Radiation with Atoms and Molecules Open
A new formalism and computer code, ASTRA (AttoSecond TRAnsitions), has been developed to treat the interactions of short, intense radiation with molecules. The formalism makes extensive use of transition density matrices, computed using a …
View article: ASTRA: Transition-density-matrix approach to molecular ionization
ASTRA: Transition-density-matrix approach to molecular ionization Open
We describe astra (attosecond transitions), a close-coupling approach to molecular ionization that uses many-body transition-density matrices between ionic states with arbitrary spin and symmetry, in combination with hybrid integrals betwe…
View article: Two-photon double ionization with finite pulses: Application of the virtual sequential model to helium
Two-photon double ionization with finite pulses: Application of the virtual sequential model to helium Open
As a step toward the full ab initio description of two-photon double ionization processes, we present a finite-pulse version of the virtual-sequential model for polyelectronic atoms. The model relies on the ab initio description of the sin…
View article: ASTRA: a Transition-Density-Matrix Approach to Molecular Ionization
ASTRA: a Transition-Density-Matrix Approach to Molecular Ionization Open
We describe \ASTRA{} (AttoSecond TRAnsitions), a new close-coupling approach to molecular ionization that uses many-body transition density matrices between ionic states with arbitrary spin and symmetry, in combination with hybrid integral…
View article: Two-photon double ionization with finite pulses: Application of the virtual sequential model to helium
Two-photon double ionization with finite pulses: Application of the virtual sequential model to helium Open
As a step toward the full \emph{ab-initio} description of two-photon double ionization processes, we present a finite-pulse version of the virtual-sequential model for polyelectronic atoms. The model relies on the \emph{ab initio} descript…
View article: Measuring autoionization decay lifetimes of optically forbidden inner valence excited states in neon atoms with attosecond noncollinear four-wave-mixing spectroscopy
Measuring autoionization decay lifetimes of optically forbidden inner valence excited states in neon atoms with attosecond noncollinear four-wave-mixing spectroscopy Open
Attosecond noncollinear four-wave-mixing spectroscopy with one attosecond extreme ultraviolet (XUV) pulse and two few-cycle near-infrared (NIR) pulses was used to measure the autoionization decay lifetimes of inner valence electronic excit…
View article: Measuring autoionization decay lifetimes of optically forbidden inner valence excited states in neon atoms with attosecond noncollinear four wave mixing spectroscopy
Measuring autoionization decay lifetimes of optically forbidden inner valence excited states in neon atoms with attosecond noncollinear four wave mixing spectroscopy Open
Attosecond noncollinear four wave mixing spectroscopy with one attosecond extreme ultraviolet (XUV) pulse and two few-cycle near-infrared (NIR) pulses was used to measure the autoionization decay lifetimes of inner valence electronic excit…
View article: ASTRA, A Transition Density Matrix Approach to the Interaction of Attosecond Radiation with Atoms and Molecules
ASTRA, A Transition Density Matrix Approach to the Interaction of Attosecond Radiation with Atoms and Molecules Open
A new formalism and computer code, ASTRA (AttoSecond TRAnsitions), has been developed to treat the interactions of short, intense radiation with molecules. The formalism makes extensive use of transition density matrices, computed using a …
View article: Validity of the static-exchange approximation for inner-shell photoionization of polyatomic molecules
Validity of the static-exchange approximation for inner-shell photoionization of polyatomic molecules Open
The simple single-channel static-exchange approximation completely ignores correlation between the continuum and molecular ion electrons. In molecular systems with symmetry equivalent atoms, the single-channel approximation can seriously f…
View article: Disentangling spectral phases of interfering autoionizing states from attosecond interferometric measurements
Disentangling spectral phases of interfering autoionizing states from attosecond interferometric measurements Open
Synopsis The spectral phase of the autoionising neon continuum has been probed via interferometric pump-probe measurements as well as ab initio, full-electron, time-dependent, theoretical calculations in energy intervals containing several…
View article: Disentangling Spectral Phases of Interfering Autoionizing States from Attosecond Interferometric Measurements
Disentangling Spectral Phases of Interfering Autoionizing States from Attosecond Interferometric Measurements Open
We have determined spectral phases of Ne autoionizing states from extreme ultraviolet and midinfrared attosecond interferometric measurements and ab initio full-electron time-dependent theoretical calculations in an energy interval where s…
View article: Partial cross sections and interfering resonances in photoionization of molecular nitrogen
Partial cross sections and interfering resonances in photoionization of molecular nitrogen Open
We present an in-depth theoretical study of N2 photoionization in the region between the second (2Πu) and third (2Σu+) ionization thresholds. In this region, the electronic continuum includes the Hopfield series of autoionizing states, cor…
View article: Anisotropic photoemission time delays close to a Fano resonance
Anisotropic photoemission time delays close to a Fano resonance Open
View article: Photoionization of strongly correlated many-electron atoms and molecules: a hybrid-basis close-coupling interface to quantum chemistry packages
Photoionization of strongly correlated many-electron atoms and molecules: a hybrid-basis close-coupling interface to quantum chemistry packages Open
Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Química. Fecha de lectura: 21-09-2017
View article: Photoionization using the xchem approach: Total and partial cross sections of Ne and resonance parameters above the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:msup><mml:mi>s</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mn>2</mml:mn><mml:msup><mml:mi>p</mml:mi><mml:mn>5</mml:mn></mml:msup></mml:mrow></mml:math> threshold
Photoionization using the xchem approach: Total and partial cross sections of Ne and resonance parameters above the threshold Open
The XCHEM approach interfaces well established quantum chemistry packages with scattering numerical methods in order to describe single-ionization processes in atoms and molecules. This should allow one to describe electron correlation in …
View article: Angular dependence of photoemission time delay in helium
Angular dependence of photoemission time delay in helium Open
Time delays of electrons emitted from an isotropic initial state with the absorption of a single photon and leaving behind an isotropic ion are angle independent. Using an interferometric method involving XUV attosecond pulse trains and an…
View article: Dressing Effects in the Attosecond Transient Absorption Spectra of Doubly-Excited States in Helium
Dressing Effects in the Attosecond Transient Absorption Spectra of Doubly-Excited States in Helium Open
Strong-field manipulation of autoionizing states is a crucial aspect of electronic quantum control. Recent measurements of the attosecond transient absorption spectrum (ATAS) of helium dressed by a few-cycle visible pulse [C. Ott et al., N…
View article: Describing ionization of small molecules with a Gaussian and B-Splines Mixed Basis (GABS)
Describing ionization of small molecules with a Gaussian and B-Splines Mixed Basis (GABS) Open
An interface between quantum chemistry electronic structure and scattering electronic theory was developed for representing the ionization of molecules. This description is achieved by creating a mix of Gaussian and B-spline functions (GAB…
View article: Merging quantum chemistry packages with B-splines for the multichannel scattering problem
Merging quantum chemistry packages with B-splines for the multichannel scattering problem Open
To study the photoionization of polyelectronic systems by attosecond pulses, we take advantage of existing quantum chemistry packages for the description of correlated electronic states, and of hybrid Gaussian- B-splines basis for the repr…
View article: Dressing effects in the attosecond transient absorption spectra of doubly excited states in helium
Dressing effects in the attosecond transient absorption spectra of doubly excited states in helium Open
Strong-field manipulation of autoionizing states is a crucial aspect of electronic quantum control. Recent measurements of the attosecond transient absorption spectrum (ATAS) of helium dressed by a few-cycle visible pulse [C. Ott, Nature (…