Dynamical Projective Operatorial Approach (DPOA) for out-of-equilibrium systems and its application to TR-ARPES

• URL: http://arxiv.org/abs/2307.01244v1
• Date: Mon, 3 Jul 2023 17:32:34 GMT
• Title: Dynamical Projective Operatorial Approach (DPOA) for out-of-equilibrium systems and its application to TR-ARPES
• Authors: Amir Eskandari-asl and Adolfo Avella (University of Salerno, Italy)
• Abstract summary: We propose a novel model-Hamiltonian method, the dynamical projective operatorial approach (DPOA) DPOA is built to address pumped systems and, in particular, pump-probe spectroscopies. The latter expansion clarifies how single- and multi-photon resonances, rigid shifts, band dressings, and different types of sidebands emerge.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Efficiently simulating real materials under the application of a time-dependent field and computing reliably the evolution over time of relevant response functions, such as the TR-ARPES signal or differential transient optical properties, has become one of the main concerns of modern condensed matter theory in response to the recent developments in all areas of experimental out-of-equilibrium physics. In this manuscript, we propose a novel model-Hamiltonian method, the dynamical projective operatorial approach (DPOA), designed and developed to overcome some of the limitations and drawbacks of currently available methods. Relying on (i) many-body second-quantization formalism and composite operators, DPOA is in principle capable of handling both weakly and strongly correlated systems, (ii) tight-binding approach and wannierization of DFT band structures, DPOA naturally deals with the complexity and the very many degrees of freedom of real materials, (iii) dipole gauge and Peierls substitution, DPOA is built to address pumped systems and, in particular, pump-probe spectroscopies, (iv) a Peierls expansion we have devised ad hoc, DPOA is numerically extremely efficient and fast. The latter expansion clarifies how single- and multi-photon resonances, rigid shifts, band dressings, and different types of sidebands emerge and allows understanding the related phenomenologies. Comparing DPOA to the single-particle density-matrix approach and the Houston method (this latter is generalized to second-quantization formalism), we show how it can compute multi-particle multi-time correlation functions and go well beyond these approaches for real materials. We also propose protocols for evaluating the strength of single- and multi-photon resonances and for assigning the residual excited electronic population at each crystal momentum and band to a specific excitation process. The expression for ...

Related papers

• Analog quantum simulation of small-polaron physics in arrays of neutral atoms with Rydberg-dressed resonant dipole-dipole interaction [0.0]
  Recent years have seen growing interest in sharp polaronic transitions in systems with strongly momentum-dependent interactions. This work presents a scheme for investigating such phenomena in a controllable fashion within the framework of an analog quantum simulator. The envisioned analog simulator allows one to study the rich interplay of Peierls- and breathing-mode-type excitation-phonon interactions.
  arXiv  Detail & Related papers  (2024-12-26T17:54:57Z)
• Electron-Electron Interactions in Device Simulation via Non-equilibrium Green's Functions and the GW Approximation [71.63026504030766]
  electron-electron (e-e) interactions must be explicitly incorporated in quantum transport simulation. This study is the first one reporting large-scale atomistic quantum transport simulations of nano-devices under non-equilibrium conditions.
  arXiv  Detail & Related papers  (2024-12-17T15:05:33Z)
• Unveiling photon-photon coupling induced transparency and absorption [0.0]
  This study presents the theoretical foundations of an analogous electromagnetically induced transparency (EIT) and absorption (EIA) respectively. We provide a concise phenomenological description with analytical expressions for transmission spectra and dispersion elucidating how the interplay of coherent and dissipative interactions in a coupled system results in the emergence of level repulsion and attraction, corresponding to CIT and CIA, respectively.
  arXiv  Detail & Related papers  (2024-06-28T09:18:30Z)
• Single-Atom Amplification Assisted by Multiple Sideband Interference in 1D Waveguide QED Systems [3.260511603171827]
  We study the signal amplification arising from multiple Rabi sideband coherence within a one-dimensional waveguide quantum electrodynamics system. Our findings reveal signal amplification under specific resonant conditions, presenting spectra that reveal finer details than previously documented in the literature. Notably, our results indicate that amplification can occur due to either population inversion or, in some instances, through the constructive interference of multiple sidebands even in the absence of population inversion.
  arXiv  Detail & Related papers  (2023-07-20T18:19:17Z)
• Multi-level Protocol for Mechanistic Reaction Studies Using Semi-local Fitted Potential Energy Surfaces [0.0]
  We propose a multi-scale protocol for routine theoretical studies of chemical reaction mechanisms. The key aspect of the method's performance is its multi-scale nature, which not only saves computational effort but also allows extracting meaningful information.
  arXiv  Detail & Related papers  (2023-04-03T12:55:29Z)
• Dissipative preparation and stabilization of many-body quantum states in a superconducting qutrit array [55.41644538483948]
  We present and analyze a protocol for driven-dissipatively preparing and stabilizing a manifold of quantum manybody entangled states. We perform theoretical modeling of this platform via pulse-level simulations based on physical features of real devices. Our work shows the capacity of driven-dissipative superconducting cQED systems to host robust and self-corrected quantum manybody states.
  arXiv  Detail & Related papers  (2023-03-21T18:02:47Z)
• Restoring the saturation response of a PMT using pulse-shape and artificial-neural-networks [1.2183405753834562]
  The linear response of a photomultiplier tube (PMT) is a required property for photon counting and reconstruction of the neutrino energy. The linearity valid region and the saturation response of PMT were investigated using a linear-alkyl-benzene (LAB)-based liquid scintillator. A correlation was observed between the two different saturation responses, with pulse-shape distortion and pulse-area decrease.
  arXiv  Detail & Related papers  (2023-02-13T08:08:37Z)
• Spectral features of polaronic excitations in a superconducting analog simulator [0.0]
  We investigate spectral properties of polaronic excitations within the framework of an analog quantum simulator. The system emulates a lattice model that describes a nonlocal coupling of an itinerant spinless-fermion excitation to dispersionless (Einstein-type) phonons. We show that -- based on the numerically evaluated spectral function and its well-known relation with the survival probability of the initial, bare-excitation Bloch state (the Loschmidt echo) -- one can make predictions about the system dynamics following an excitation-phonon interaction.
  arXiv  Detail & Related papers  (2022-12-30T18:19:59Z)
• Simulating Spin-Orbit Coupling With Quasidegenerate N-Electron Valence Perturbation Theory [77.34726150561087]
  We present the first implementation of spin-orbit coupling effects in SO-QDNEVPT2. The accuracy of these methods is tested for the group 14 and 16 hydrides, 3d and 4d transition metal ions, and two actinide dioxides.
  arXiv  Detail & Related papers  (2022-11-11T20:03:37Z)
• On the Su-Schrieffer-Heeger model of electron transport: low-temperature optical conductivity by the Mellin transform [62.997667081978825]
  We describe the low-temperature optical conductivity as a function of frequency for a quantum-mechanical system of electrons that hop along a polymer chain. Our goal is to show vias how the interband conductivity of this system behaves as the smallest energy bandgap tends to close.
  arXiv  Detail & Related papers  (2022-09-26T23:17:39Z)
• Noise-resilient Edge Modes on a Chain of Superconducting Qubits [103.93329374521808]
  Inherent symmetry of a quantum system may protect its otherwise fragile states. We implement the one-dimensional kicked Ising model which exhibits non-local Majorana edge modes (MEMs) with $mathbbZ$ parity symmetry. MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism.
  arXiv  Detail & Related papers  (2022-04-24T22:34:15Z)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• Effect of phonons on the electron spin resonance absorption spectrum [62.997667081978825]
  We model the effect of phonons and temperature on the electron spin resonance (ESR) signal in magnetically active systems. We find that the suppression of ESR signals is due to phonon broadening but not based on the common assumption of orbital quenching.
  arXiv  Detail & Related papers  (2020-04-22T01:13:07Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.