講演抄録/キーワード |
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2016-05-31 11:10
[招待講演]量子Rabi模型に対するHepp-Lieb-Preparata量子相転移について ○廣川真男(広島大)・佐々木 格(信州大)・Jacob S. Moller(Aarhus Univ.) |
抄録 |
(和) |
本講演では,量子相転移の観点から,量子Rabi模型を考察する.
PreparataはHepp-Lieb量子相転移の数学的構造に基づき,物質と光の相
互作用が強くなると,物質・光相互作用系の基底状態が,量子状態の緩和で本来放射
すべき光子を纏い始め非摂動論的になることを主張した(Hepp-Lieb-Preparata量子相転移).
最近,情報通信研究機構の吉原らの回路量子電磁気学の実験で,
Hepp-Lieb-Preparata量子相転移を
期待させる結果が得られた.
そこで,所謂,A^2項(光の場の2乗の項)の問題を含め,
吉原らが実験で扱った量子Rabi模型をHepp-Lieb-Preparata量子相転移の観点から数理物理学的考察を行う. |
(英) |
In my talk, I would like to consider the quantum Rabi model
from the point of the view of quantum phase transition.
Preparata claims that the ground state of the
matter coupled with light is dressed with some photons
provided that the coupling strength grows large though those
photons should primarily be emitted from the matter in the
relaxation of quantum states, and then, that the perturbative ground
state switches with a non-perturbative one (Hepp-Lieb-Preparata
quantum phase transition). He finds this based on the mathematical
structure of the Hepp-Lieb quantum phase transition.
Yoshihara and others recently showed an experimental
result for the quantum Rabi model in circuit QED.
In the experiment, they succeeded in
demonstrating the so-called deep-strong coupling regime
and the ground state dressed with a photon.
We consider the quantum Rabi model in the light of the Hepp-Lieb-Preparata quantum phase transition.
Our research is among the studies with aspects of mathematical physics,
and deals with the A^2-term problem. |
キーワード |
(和) |
量子Rabi模型 / Hepp-Lieb-Preparata量子相転移 / A^2項 / 光子数期待値 / エンタングルメント / / / |
(英) |
quantum Rabi model / Hepp-Lieb-Preparata quantum phase transition / A^2-term / expectation of photon numbers / entanglement / / / |
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