Zobrazeno 1 - 10
of 687
pro vyhledávání: '"TAKAHASHI, Junichi"'
We present spectral functions extracted from Euclidean-time correlation functions by using sparse modeling. Sparse modeling is a method that solves inverse problems by considering only the sparseness of the solution we seek. To check applicability of
Externí odkaz:
http://arxiv.org/abs/2410.23567
Quantum reservoir computing is a type of machine learning in which the high-dimensional Hilbert space of quantum systems contributes to performance. In this study, we employ the Bose-Einstein condensate of dilute atomic gas as a reservoir to examine
Externí odkaz:
http://arxiv.org/abs/2408.09577
Autor:
Takezawa, Mikio, Suzuki, Ryota, Takahashi, Junichi, Shimizu, Kaito, Naruki, Ayumu, Katsumata, Kazutaka, Nemoto, Kae, Sadgrove, Mark, Sanaka, Kaoru
Publikováno v:
Physical Review Applied 20, 044038 (2023)
Rare-earth (RE) atoms in solid-state materials are attractive components for photonic quantum information systems because of their coherence properties even in high-temperature environments. We have experimentally performed the single-site optical sp
Externí odkaz:
http://arxiv.org/abs/2310.10974
Autor:
Ohmori, Shousuke, Takahashi, Junichi
Publikováno v:
J. Math. Phys. 63, 123503 (2022)
We investigate Dirac's bra-ket formalism based on a rigged Hilbert space for a non-Hermite quantum system with a positive-definite metric. First, the rigged Hilbert space, characterized by positive-definite metric, is established. With the aid of the
Externí odkaz:
http://arxiv.org/abs/2209.01598
Spin-orbit coupling (SOC), which is inherent to a Dirac particle that moves under the influence of electromagnetic fields, manifests itself in a variety of physical systems including non-relativistic ones. For instance, it plays an essential role in
Externí odkaz:
http://arxiv.org/abs/2108.06465
Publikováno v:
In Composites Part B 15 April 2024 275
Publikováno v:
Atoms 9, 18 (2021)
The notion of a polaron, originally introduced in the context of electrons in ionic lattices, helps us to understand how a quantum impurity behaves when being immersed in and interacting with a many-body background. We discuss the impact of the impur
Externí odkaz:
http://arxiv.org/abs/2101.07643
Publikováno v:
In Science of the Total Environment 1 January 2024 906
Publikováno v:
Phys. Rev. A 103, 043334 (2021)
This study develops a novel experimental method of deducing the profile of interaction induced between impurities in a trapped gas of ultracold Fermi/Bose atoms, which are often referred to as Fermi/Bose polarons. In this method, we consider a two-bo
Externí odkaz:
http://arxiv.org/abs/2011.07911
Publikováno v:
Phys. Rev. A 102, 051302 (2020)
We propose a new protocol to examine many-polaron properties in a cold atom experiment. Initially, polaronic clouds are prepared around the opposite edges of a majority gas cloud. After time evolution, the collision of two clouds exhibits various pol
Externí odkaz:
http://arxiv.org/abs/1912.12832