Nonrelativistic quantum electrodynamic approach to photoemission theory

Fujikawa, Takashi; Arai, Hiroko

doi:10.1016/j.elspec.2005.07.003

Cited by 19 publications

(16 citation statements)

References 39 publications

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“…As a next step, we therefore explain the way to formally obtain the self-energies in our formalism by using the chain rule of the functional derivative. [82][83][84][85][86][87][88][89] For this purpose, it is convenient to introduce the inverse of the single-particle GF G −1 C that satisfies (96) in the same manner as Eq. (73).…”

Section: Single-particle Gfmentioning

confidence: 99%

Generating functional approach for spontaneous coherence in semiconductor electron-hole-photon systems

Yamaguchi¹,

Nii²,

Kamide³

et al. 2015

Phys. Rev. B

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Electrons, holes, and photons in semiconductors are interacting fermions and bosons. In this system, a variety of ordered coherent phases can be formed through the spontaneous phase symmetry breaking because of their interactions. The Bose-Einstein condensation (BEC) of excitons and polaritons is one of such coherent phases, which can potentially crossover into the Bardeen-CooperSchrieffer (BCS) type ordered phase at high densities under quasi-equilibrium conditions, known as the BCS-BEC crossover. In contrast, one can find the semiconductor laser, superfluorescence (SF), and superradiance as relevant phenomena under nonequilibrium conditions. In this paper, we present a comprehensive generating functional theory that yields nonequilibrium Green's functions in a rigorous way. The theory gives us a starting point to discuss these phases in a unified view with a diagrammatic technique. Comprehensible time-dependent equations are derived within the Hartree-Fock approximation, which generalize the Maxwell-Semiconductor-Bloch equations under the relaxation time approximation. With the help of this formalism, we clarify the relationship among these cooperative phenomena and we show theoretically that the Fermi-edge SF is directly connected to the e-h BCS phase. We also discuss the emission spectra as well as the gain-absorption spectra.

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Section: Single-particle Gfmentioning

confidence: 99%

Generating functional approach for spontaneous coherence in semiconductor electron-hole-photon systems

Yamaguchi¹,

Nii²,

Kamide³

et al. 2015

Phys. Rev. B

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“…Because the Dyson equation for the EGF, PGF, and different self-energy corrections have been calculated many times in various papers, 3,[5][6][7][8][9] we just present definitions and emphasize major steps in those derivations, and focus on electron-photon self-energy.…”

Section: Theorymentioning

confidence: 99%

Semiconductor laser simulations using non-equilibrium Green’s functions

Miloszewski

Wartak

2012

Journal of Applied Physics

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Articles you may be interested inComparative analysis of quantum cascade laser modeling based on density matrices and non-equilibrium Green's functions Appl. Phys. Lett. 105, 103106 (2014); 10.1063/1.4895123 Non-equilibrium Green's function calculation for GaN-based terahertz-quantum cascade laser structures J. Appl. Phys. 111, 083105 (2012); 10.1063/1.4704389Multiquantum well gain modeling using a Green's function-based fractional dimensional approach

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“…The recent approach from quantum electrodynamics (QED) theory can give a clear solution. [4] The relativistic QED theory provides a very general formula for the photoelectron current density in terms of quasi-nonrelativistic retarded and advanced Green's functions g r 11 and g a 11 and a large component ϕ c of the core function [5] : …”

Section: Basic Photoemission Formulamentioning

confidence: 99%

“…A practical method has been developed to calculate the XPD spectra on the basis of Keldysh Green's function approach. [3] The major advantage of this theoretical framework is the feasibility of inclusion of temperature effects, [3] radiation field effects, [4] and also relativistic effects. [5] We discuss some new theoretical developments based on this framework.…”

Section: Introductionmentioning

confidence: 99%