早稲田大学SGU数物系科学拠点では，以下の要領でUniversity of BariのPaolo FACCHI教授とSaverio PASCAZIO教授による特別セミナーを開催します。
日程
2023年3月7日（火）16:30-18:00
会場：早稲田大学 西早稲田キャンパス 55号館N棟1階 第一会議室
講演者：Paolo FACCHI教授（University of Bari, Italy）
題目： “Control of Quantum Noise: On the Role of Dilations”
概要： We show that every finite-dimensional quantum system with Markovian (i.e. GKLS-generated) time evolution has an autonomous unitary dilation which can be dynamically decoupled. Since quantum stochastic calculus provides also an autonomous unitary dilation which cannot be dynamically decoupled, this highlights the role of dilations in the control of quantum noise. We construct our dilation via a time-dependent version of Stinespring in combination with Howland’s clock Hamiltonian and certain point-localised states. We show this dilation is very flexible and can be applied to every analytic (not necessarily Markovian) family of quantum channels.
2023年3月13日（月）16:30-18:00
会場：早稲田大学 西早稲田キャンパス 55号館N棟1階 第二会議室
講演者：Saverio PASCAZIO教授（University of Bari, Italy）
題目： “Dimensional Reduction of Field Theories”
概要： We derive and discuss one- and two-dimensional (classical) field-theoretical models by making use of Hadamard’s method of descent. We focus on electromagnetism (Maxwell) and spin-1/2 fields (Dirac). Low-dimensional field models are conceived as a specialization of the higher dimensional ones, in which the fields are uniform along the additional spatial directions. We consider the free situation and then the interacting fields. The basic properties of these theories, as well as their relation with existing models for two-dimensional matter, are discussed. We focus on the relevance of these findings for the quantum simulation of (lattice) gauge theories.
言語
英語
対象
研究者、学生
参加費
無料
事前登録
不要
お問合わせ
早稲田大学 先進理工学部 物理学科 教授
湯浅一哉 yuasa [at] waseda.jp
