Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Nghiem, H. T. M."'
Absorption and scattering properties of nanoparticles immersed in an absorbing medium are essential in understanding the overall properties of composites and in designing materials with expected functionalities. In this paper, we establish the model
Externí odkaz:
http://arxiv.org/abs/2408.04248
Complex refractive index measurements of Poly(methyl methacrylate) (PMMA) over the UV-VIS-NIR region
Publikováno v:
Optics Continuum Vol. 2, Issue 11, pp. 2280-2289 (2023)
Poly(methyl methacrylate), PMMA, is a popular polymer for optical applications due to its superior transmission and reflection. However, its optical properties in the ultraviolet regime still need to be thoroughly studied. Using the reflection-transm
Externí odkaz:
http://arxiv.org/abs/2305.06551
Autor:
Nghiem, H. T. M., Costi, T. A.
Publikováno v:
Phys. Rev. B 104, 205113 (2021)
The self-energy method for quantum impurity models expresses the correlation part of the self-energy in terms of the ratio of two Green's functions and allows for a more accurate calculation of equilibrium spectral functions than is possible directly
Externí odkaz:
http://arxiv.org/abs/2109.01580
Publikováno v:
Phys. Rev. B 101, 115117 (2020)
We investigate several definitions of the time-dependent spectral function $A(\omega,t)$ of the Anderson impurity model following a quench and within the time-dependent numerical renormalization group method. In terms of the two-time retarded Green f
Externí odkaz:
http://arxiv.org/abs/1912.08474
Autor:
Nghiem, H. T. M., Costi, T. A.
Publikováno v:
Phys. Rev. B 98, 155107 (2018)
We develop an alternative time-dependent numerical renormalization group (TDNRG) formalism for multiple quenches and implement it to study the response of a quantum impurity system to a general pulse. Within this approach, we reduce the contribution
Externí odkaz:
http://arxiv.org/abs/1803.04098
Autor:
Nghiem, H. T. M., Costi, T. A.
Publikováno v:
Phys. Rev. Lett. 119, 156601 (2017)
We investigate the time evolution of the Kondo resonance in response to a quench by applying the time-dependent numerical renormalization group (TDNRG) approach to the Anderson impurity model in the strong correlation limit. For this purpose, we deri
Externí odkaz:
http://arxiv.org/abs/1701.07558
Publikováno v:
Phys. Rev. B 93, 165130 (2016)
We investigate the thermodynamics and transient dynamics of the (unbiased) Ohmic two-state system by exploiting the equivalence of this model to the interacting resonant level model. For the thermodynamics, we show, by using the numerical renormaliza
Externí odkaz:
http://arxiv.org/abs/1601.04080
Autor:
Nghiem, H. T. M., Costi, T. A.
Publikováno v:
Phys. Rev. B 90, 035129 (2014)
The time-dependent numerical renormalization group method (TDNRG) [Anders et al., Phys. Rev. Lett. {\bf 95}, 196801 (2005)] was recently generalized to multiple quenches and arbitrary finite temperatures [Nghiem et al., Phys. Rev. B {\bf 89}, 075118
Externí odkaz:
http://arxiv.org/abs/1406.3444
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