「パケット道場」
「パケット道場」とは、GCOEのパケット准教授が皆さんの英語についての質問に答えるセミナーです。
物理学・宇宙物理学専攻の全員は自由に参加できます。このセミナーでは、パケットが参加者の執筆中の
論文を対象にして英語の使い方についてアドバイスし、参加者の質問と関連している問題点の解説を行います。
それぞれの参加者の論文に効率よく対応できるようにスケジュールを組むことにします。そのために、パケットの
研究室(理学研究科5号館、406号室)の外にスケジュール表が張ってありますので、ご興味のある方は、ご自由に
予約を取って下さい。(一人当たりの時間は10分となっていますが、場合によってはこの時間を短くまたは長くする
こともあるかもしれません。)
日:(大体)毎月の第2、第4金曜日*
時間:14:00〜16:00
場所:理学研究科5号館、401教室
*4月は第3(17日)第4(24日)
GCOE特別講義
- title
- 物理研究者のための場の量子論
- author
- 細道 和夫
(京都大学基礎物理学研究所・GCOE特定准教授)
- place
- 理学研究科5号館 第4講義室(525号室))
- schedule
-
12月21日(月) 10:30-12:00 13:30-15:00 15:30-17:00
12月22日(火) 10:30-12:00 13:30-15:00 15:30-17:00
12月23日(水) 10:30-12:00
- title
- 光と量子情報
- author
- 青木 隆朗
(京都大学大学院理学研究科・GCOE特定准教授)
- place
- 理学研究科5号館 第4講義室(525号室))
- schedule
-
10月7日(水) 13:30-15:00 15:30-17:00
10月8日(木) 10:30-12:00 13:30-15:00 16:00-17:30 (談話会形式)
10月9日(金) 10:30-12:00
- syllabus
-
本特別講義では、光の量子性、光と物質の量子力学的な相互作用、
およびそれらの量子情報科学への応用に関する研究の実験的手法を解説する。
光子の概念は100年前のアインシュタインによる光電効果の説明にまでさかのぼるが、
光の量子性を実験室で直接、観測・制御する技術は50年前のレーザー
の発明後に飛躍的に発展し、現在ではさまざまな分野における精密
計測技術の基礎となっている。特に、光のコヒーレンスの量子力学
的定式化と、光コムの発明に対して2005年にノーベル物理学賞が与
えられたことは記憶に新しい。また、光を微小共振器に閉じ込める
ことでその中での光と物質の相互作用を増強し、単一光子レベルの
光と物質のコヒーレントな相互作用を、散逸過程に隠されることな
く観測することが可能になってきている。本講義では、このような
研究の進展と、量子情報科学への応用について解説する。
1. 量子光学の基礎
2. キャビティQEDとJaynes-Cummingsモデル
3. 微小光共振器
4. 単一光子の発生と検出
5. トロイド型微小共振器を用いたキャビティQED(談話会)
6. 光学的量子情報
- title
- 重力・重力波物理学
- author
- 安東 正樹
(京都大学大学院理学研究科・GCOE特定准教授)
- place
- 理学部5号館501号室
- schedule
-
9月29日(火) 10:30-12:00 13:30-15:00 15:30-17:00
9月30日(水) 10:30-12:00 13:30-15:00 16:00-17:30 (談話会形式)
- syllabus
-
本特別講義では、重力法則の検証・重力波の観測について、
目的とする物理や精密計測のための実験的手法を説明する。
一般相対性理論によると、重力は時空の歪みとして、
重力波はその歪みが伝搬するものとして表わされる。
重力法則の検証実験については、現在の物理学で大きな問題と
されている階層性問題・宇宙項問題に対する知見を与えることが期待されている。
一方、重力波の観測によって、新しい天文学・宇宙論が切り拓かれることが
期待できる。ただ、重力・重力波の効果は非常に微弱であるため、
これらの測定・観測には微小計測・微小信号処理の技術が要求されている。
本講義では、これらの実験的手法と研究の現状についても触れる。
1. 重力と重力波
2. 重力波による天文学・観測手法
3. レーザー干渉計型重力波検出器
4. 重力波信号の探査・最新の結果
5. 余剰次元理論と重力法則
6. 重力法則の検証実験
7. トピックス・将来の見通し
- title
- 科学研究のための英語
- author
- Glenn Curtis Paquette
(京都大学大学院理学研究科・GCOE特定准教授)
- place
- 理学部5号館525号室
- schedule
-
Session I:
Oct. 13, 20, 27 (Tues) 4:30--6:00
Session II:
Jan. 12, 19, 26 (Tues) 4:30--6:00
Session III:
Feb. 22, 24, 26 (M,W,F) 4:30--6:00
Mar. 1, 3, 5 (M,W,F) 4:30--6:00
- syllabus
-
In this course, we will study and practice
the fundamentals of oral presentation of
research results in English. The emphasis
of the course will be on practice, with
most of the class time used for student
presentations. Students will be required
to prepare and give several talks of various
lengths in which they present research results.
Significant time will also be dedicated
to question/answer sessions, in which all
students will be required to participate.
Course grades will be determined by both
the quality of presentations and participation
in question/answer sessions. The entire
course will be conducted in English. The
course is open to all doctor-course students
in Physics I, Physics II and Astronomy.
- Note
-
受講人数は24人に限定し、D3、D2、D1という
優先順位で受講者を決定します。受講したい方は
メールにて10月5日(月)までにパケット
(paquette@scphys.kyoto-u.ac.jp)に申し
込んで下さい。その時、お名前
(漢字とふりがな)、学生番号、所属(物1、物2、宇宙)、
学年を明記してください。
この授業は博士後期課程の学生を対象とするので、単位はありません。
セミナー・講演会
GCOEセミナー
- title
- Quantum opto-mechanics using an optically levitated nanosphere
- author
-
Darrick E. Chang
(California Institute of Technology)
- date
- 2010年3月24日(水) 14:00−15:30
- place
- 物理学教室5号館1階 115号室
- abstract
-
One of the most intriguing questions associated with quantum
theory is whether effects such as quantum coherence and entanglement
can be observed at macroscopic scales. As a first step towards
resolving this question, recently much effort has been directed
toward quantum state preparation of high-Q modes of nano-mechanical
oscillators -- in particular, cooling such modes to their quantum
ground state. To reach the quantum regime, it is necessary to
minimize the thermalization and decoherence rates of these systems,
which thus far has necessitated the use of cryogenic operating
environments. Here we propose a fundamentally different approach,
where one optically levitates an entire mechanical system inside
an optical cavity, thus eliminating any contact of the system with
the environment through clamping or material supports. Such an
approach should facilitate the emergence of quantum behavior even
in room-temperature environments. In particular, we show theoretically
that the center-of-mass motion of an optically levitated nanosphere
can be laser-cooled to its quantum ground state starting from room
temperature. We also describe a technique to transfer quantum states
of motion onto light or vice versa. This can be used to entangle two
spheres separated by large distances in different cavities, starting
from a pair of entangled optical beams generated using conventional
nonlinear optics. Conversely, the optical trapping fields can be
manipulated to create highly non-classical states of motion, which
subsequently can be mapped onto light. As two examples, we show
that an optically levitated sphere can be used to generate squeezed
states of light and single photons. These examples suggest tremendous
potential to realize nonlinear optical processes or quantum information
processing of light using opto-mechanical systems.
- contact
-
青木隆朗 Takao Aoki (
takao.aoki@scphys.
kyoto-u.ac.jp, Tel:075-753-3804)
- note
-
GCOE講演会
- title
- Cosmology Today
- author
-
Professor George F. Smoot
University of California at Berkeley
- date
- 2010年2月22日(月曜日) 16:30−18:00
- place
- 理学部6号館3階 301号室
- abstract
-
Using our most advanced techniques and instruments we sift through
relic clues and evidence to understand the events surrounding the
birth and subsequent development of the Universe. A precision
inspection and investigation of the Cosmic Scene along with careful
analysis, discussion, and computer modeling have allowed us determine
what happened over billions of years with amazing certainty and accuracy.
Some of our findings are surprising and even provide shocking twists of plot.
There remain even additional mysteries to be solved. In spite of that
we can tell the tale of the creation and history of the Universe show
key supporting evidence some of it from very early times including
using the cosmic background light to provide a direct image of the
embryo universe and new techniques to reveal dark matter and dark energy.
- contact
-
川合光 (
gcoe-office@scphys.kyoto-u.ac.jp, Tel:075-753-3758)
- note
-
GCOEセミナー
- title
- Opportunities for neutron beam research at Australia's OPAL reactor
- author
-
Dr. S J Kennedy
(Technical Director, Bragg Institute Australian Nuclear Science & Technology Organisation)
- date
- 2010 年 2月10日(水曜日) 14:30−15:30
- place
- 物理学教室 1階 115号室
- abstract
-
Neutron scattering has evolved over more than 1/2 century into a
powerful set of tools for determination of atomic and molecular
structures. Modern neutron sources, such as the OPAL research
reactor at ANSTO, offer the chance to determine complex structures
over length scales from ~0.1 nm to ~10 μm, information on atomic
and molecular dynamics, on magnetic interactions and on the location
and behaviour of light elements and gases (such as hydrogen) in
a broad variety of materials. Consequently, neutron scattering
has found a niche at the forefront of condensed matter research.
The presentation will outline the strengths of neutron scattering,
describe the OPAL research reactor, and provide an overview of the
opportunities for experimental research, including highlights from
recent experiments. The discussion will emphasize how university
researchers can utilize these exciting new facilities.
- contact
-
岩下 (Yoshihisa Iwashita
iwashita@kyticr.
kuicr.kyoto-u.ac.jp, Tel:0774-38-3282)
GCOEセミナー
- title
- The self-organization of macromolecules with amphiphilic monomer units and in crowding environment
- author
-
Professor Valentina Vasilevskaya
(Nesmeyanov Institute of Organoelement Compounds RAS)
- date
- 2010 年1 月 22日(金) 10:30-12:00
- place
- 理学研究科5号館401号室
- abstract
-
The self-organization of two types of polymer system will be discussed.
First, we consider the macromolecules composed of amphiphilic monomer
units having both hydrophobic and hydrophilic groups. Secondly, we address
the polyelectrolyte macromolecules in crowding environment.
The results of our collaboration with the laboratory of Professor K.Yoshikawa
(Kyoto University) during last year will be presented as well.
Namely, we present results of computer modeling of amphiphilic AP macromolecules and
a theory of DNA compactization in solution of BSA (bovine serum albumin).
By means of the computer modeling we studied the coil-to-globule transition of
macromolecules composed of hydrophilic P and amphiphilic A monomer units.
It was shown that inner structure of a globule of such AP macromolecules depends
on the radius of action of potential. In case of the long-ranged potential
the globule has blob-like structure, while in case of short-ranged potential
the backbone of macromolecules forms the helix structure with a variable
direction of bending. In the latter case, the compactization of AP
macromolecules proceeds through the formation necklace conformation
with quasi-helix beads. The theory of DNA compactization in crowding
of strongly charged BSA molecules was created. It was proposed that
the main factors governing the conformation of DNA are the depletion
effect and the strong electrostatic repulsion between BSA and DNA molecules.
It was shown that at low salt concentration with increase of the BSA
concentration DNA at first contracts smoothly and then undergoes the
sharp jump-wise transition; the concentration of BSA in the point of
this transition depends on the salt concentration. It was also shown,
that the higher the salt concentration, the smoother the transition.
- contact
-
吉川 研一 (
yoshikaw@scph
ys.kyoto-u.ac.jp, Tel:075-753-3671)
- note
-
GCOE・基研合同一般講演会
- title
- Topological Defects in Cosmology and Condensed Matter
- author
-
Tom Kibble
(Imperial College, London)
- date
- 2010 年1 月15 日(金) 4:30 p.m. 〜
- place
- 京都大学基礎物理学研究所 湯川記念館・Panasonic 国際交流ホール
- abstract
-
I shall briefly review the conditions under which topological defects
may be expected to form at a symmetry-breaking phase transition,
either in the early Universe or in low-temperature condensed-matter
systems. Methods of estimating the density of defects produced by
cooling through the transition at a finite rate, which were first developed
in a cosmological context, have led to very innovative developments
in condensed matter. These ideas have been tested in experiments
in superfluids, liquid crystals, superconductors, and various
other systems. I shall describe these developments and review the
current status of the experiments. On the cosmological side, there is
as yet no firm observational evidence for the existence of topological
defects. Recent suggestions that a cosmic string might have been
detected by its gravitational lensing effect have proved unfounded.
On the other hand, the theoretical arguments for their existence
have been strengthened by the discovery that cosmic strings of various
kinds appear naturally in superstring theory. There are thus
good grounds for optimism about their future detection.
- contact
-
基礎物理学研究所 教授 佐々木 節(内線:7043)
- note
-
このセミナーは京都大学基礎物理学研究所と京都大学理学研究科グローバルCOEプログラム
「普遍性と創発性から紡ぐ次世代物理学」の共催で行われます。
参照 基研HP:
http://www.yukawa.kyoto-u.ac.jp/contents/seminar/detail.php?SNUM=50940
GCOEセミナー
- title
- The Digital Universe 3D Atlas デジタル宇宙3次元アトラス
- author
-
Dr. Carter Emmart
(Rose Center for Earth and Space at the American Museum of Natural History, New York, USA)
- date
- 2009年12月14日(月)13:00 - 14:30
- place
- 宇宙物理学教室 会議室
- abstract
-
The Digital Universe (DU) is an ongoing project at the American Museum of
Natural History (AMNH) to accurately create a 3D data atlas of the cosmos,
started with NASA funding in 1998. DU was conceived as the basis for
making immersive planetarium space shows in full dome graphics from data
visualization. The techniques necessary to display the true scale
range of the universe in a continuous, exponential manner present
to common audiences a visual equivalence of the mathematical
convention of scientific notation. While planetarium shows
traditionally explore the macro realm beyond Earth, any scale
is within reach of such techniques, opening up a challenge for standards
of 3D data that might be accommodated into a global library of
content that spans the entire scale range of current knowledge.
Examples from DU will be shown in Uniview, one such software technique
developed as an academic collaboration between AMNH and Linkoping
University in Sweden, and the Swedish company SCISS was founded to
support Uniview as a commercial product. A central concept of
Uniview is simultaneous, multiple user capability with identical
content viewed on single screen or in dome displays. Such
communication abilities enable remote connection between authorities,
audiences and classrooms with the goal of linking the concept of
DU and demonstrating current understanding from science across the cultures of the world.
http://www.haydenplanetarium.org/universe
- contact
- 柴田一成(shibata@kwasan.kyoto-u.ac.jp, 内線 3893)
- note
-
GCOEセミナー
- title
- 力学史を問い直す −ニュートン力学の成立をめぐって−
- author
-
有賀 暢迪
(京都大学大学院文学研究科 博士後期課程)
- date
- 2009年11月12日(木曜日)14:00 - 15:30
- place
- 物理学教室 第4講義室
- abstract
-
物理学の基本である力学(古典力学)ははるか昔に完成していたようなイメージがあるが、実はそうではない。
ニュートン自身の力学は今日のニュートン力学とは大きく異なっているし、
ラグランジュの『解析力学』は今日ラグランジュ形式と呼ばれているものを解説した本ではない。こうしたことがらは、
科学史の専門的な研究においては半ば「常識」となっているが、物理学者にとっては必ずしもそうではないように思われる。
この講演では、ニュートン力学が成立してくる18世紀という時代を中心に力学史の大筋を解説した上で、
講演者が目下取り組んでいる歴史研究の一端を紹介することにしたい。
- contact
- 米澤進吾(Shingo Yonezawa; yonezawa@scphys.kyoto-u.ac.jp 内線 3744)
- note
-
GCOEセミナー
- title
- 物理学を一生の仕事としようとしている若い人に
- author
-
西村 肇氏 (Prof. Jim Nishimura)
(東京大学名誉教授)
- date
- 2009年8月25日(火曜日)1.) 10:30-12:00, 2.) 14:00-15:30
- place
- 京都大学 物理学教室 413号室
- abstract
-
1) 物理屋は自分の物理世界を持たなければ本物ではない
Nambu, Feynman, Bethe, Gamow
2) 物理学の外の世界でこそ物理屋らしい仕事ができる
水俣病、遺伝子工学、社会物理、
参考資料
The talk 1
1. 南部陽一郎の独創性の秘密 (1)(2)(3)
2. 独創的研究をするには
The talk 2
1. 科学者から見た水俣病研究
2.「水俣病の科学」あとがき
3.「水俣病の科学」第2章主要部立読み
以上の資料はHPにて公開されています。
http://jimnishimura.jp/compre/lecture_ku090825/090825.html
参考書籍
「ゲノム医学入門」(日本評論社)、「人の値段」 (講談社)
- contact
-
- note
- 稲垣紫緒(S.INAGAKI:
inagaki@chem.scphys.kyoto-u.ac.jp、時空間秩序研究室)
定員25名まで、参加希望者は稲垣まで参加希望の旨ご連絡ください。
GCOE・基研セミナー(物性)
- title
- Aggregation & Fragmentation Kinetics in Granular Gases
- author
-
Anna Bodrova
(Moscow State University)
- date
- 2009 年 7月15日(水) 4:00 p.m.
- place
- 京都大学基礎物理学研究所 研究棟・講義室K202
- abstract
- Aggregation and fragmentation are important processes, which
play a key role in many astrophysical systems. Formation
of planets and planetesemals, evolution of interstellar dust
clouds and planetary rings, such as Saturnian Rings, etc.
may serve as representative examples. We discuss simplified
theoretical models of ballistic of aggregation and fragmentation,
which nevertheless describe the most salient properties
of real systems. We study evolution of granular gases
with fragmentation and aggregation along with the properties
of the steady state. Analytical results are compared with
the numerical solutions of the respective rate equations and
with the results of the Monte-Carlo simulations. A good
agreement between the theory and simulations is observed.
Application of the theory to the experimental data for the
planetary rings of Saturn is discussed.
- contact
-
- note
- このセミナーは京都大学基礎物理学研究所と
京都大学理学研究科グローバルCOEプログラム「普遍性と創発性から紡ぐ次世代物理学」の共催で行われます。
GCOEセミナー
- title
- Tidal Tails
- author
-
Prof. D.C. Heggie
(University of Edinburgh)
- date
- 2009 年 7月10日(金) 午後4時 〜
- place
- 理学研究科1号館 5階 531号室
- abstract
- Galactic satellites and globular star clusters are
observed to lose stars along narrow streams called 'tidal tails'.
In a few cases the distribution of stars along the streams
is irregular (clumpy). In this seminar I first review the
dynamics underlying the formation and evolution of tidal
tails. Then I show that clumpy structures can arise even
when the rate of escape is steady; they do not imply that
the rate of loss of mass is time-dependent.
- contact
- Shin Mineshige
- note
-
GCOE・基研セミナー(素粒子)
- title
- Control and readout of the electron spin of individual dopant atoms in silicon
- author
-
Laszlo Feher
(Budapest, RMKI and Szeged U.)
- date
- 2009 年6 月24 日(水) 1:30 p.m.
- place
- 京都大学基礎物理学研究所 湯川記念館・大会議室Y306
- abstract
- Two integrable many-body problems are called dual to each
other if the action variables of model i) are the particlecoordinates
of model ii), and vice versa. It has been found by S. Ruijsenaars
between 1989-95 that the ‘Calogero type’one-dimensional many-body
models form dual pairs in the above sense. We discuss a group theoretic
interpretation of the duality focusing on a relatively simple example.
The talk is based on a joint paper with C. Klimcik, available as arXiv:0901.1983.
- contact
- 基礎物理学研究所 准教授 笹倉直樹(内線:7037)
- note
- このセミナーは京都大学基礎物理学研究所と
京都大学理学研究科グローバルCOEプログラム「普遍性と創発性から紡ぐ次世代物理学」の共催で行われます。
GCOE・基研セミナー(物性)
- title
- Combination of FTLM and DMRG for dynamics
at finite temperature
- author
-
Jure Kokalj
(Budapest, RMKI and Szeged U.)
- date
- 2009 年6 月22 日(月) 4:00 p.m.
- place
- 京都大学基礎物理学研究所 研究棟・講義室K202
- abstract
- Study of strongly correlated systems still poses unanswered
fundamental questions regarding conductivity at finite temperature,
e.g. the relation between integrability and ballistic
transport. This however reflects the lack of sufficiently accurate
methods for calculation of finite temperature dynamics
and poses serious challenges to the numerical studies. I will
present new method, which is a combination of FTLM and
DMRG, and is used for calculation of dynamical properties
of one dimensional systems at finite temperature. As a test
and demonstration I will show some
- contact
-
- note
- このセミナーは京都大学基礎物理学研究所と
京都大学理学研究科グローバルCOEプログラム「普遍性と創発性から紡ぐ次世代物理学」の共催で行われます。
GCOEセミナー
- title
- Control and readout of the electron spin of individual dopant atoms in silicon
- author
-
Dr. Andrea Morello
(Australian Research Council Centre of Excellence for Quantum Computer Technology and School
of Electrical Engineering and Telecommunication,
The University of New South Wales, Sydney, Australia)
- date
- 2009年6月12日(金曜日) 16:00 - 17:00
- place
- 物理学教室 401号室
- abstract
- Silicon is an ideal host for donor-based electron spin qubits.
It can be isotopically purified to eliminate nuclear spins and obtain
long electron spin coherence, and the negligible spin-orbit coupling
ensures extremely long relaxation times. Here I will review our latest
results on the control and readout of the electron spin state of a
single dopant atom in silicon. We have developed CMOS-compatible devices
that combine a novel type of Single-Electron Transistor (SET) [1] with
individually implanted phosphorus atoms [2] and a local Electron Spin
Resonance line [3]. This scheme allows single-shot readout of an individual
donor electron while minimizing the back-action of the charge sensor.
For the first time we have a structure where the donor and the SET are
tunnel-coupled, yielding very high charge transfer signals [4]. As an
alternative, we have demonstrated resonant charge tunneling through a
single P atom by transport experiments, whereby the energy levels
and the Zeeman splitting of a single donor can be studied in detail.
[1] S. J. Angus, A. J. Ferguson, A. S. Dzurak, and R. G. Clark, Appl. Phys. Lett. 92, 112103 (2008).
[2] D. N. Jamieson et al., Appl. Phys. Lett. 86, 202101 (2005).
[3] L. H. Willems van Beveren et al., Appl. Phys. Lett. 93, 072102 (2008).
[4] A. Morello et al., arXiv:0904.1271 (2009).
- contact
- Yoshi Maeno(maeno@scphys.kyoto-u.ac.jp
・内線 3783)
- note
-
GCOEセミナー
- title
- The H, P, T phase diagram of URu2Si2 P and H switch of ground states
- author
-
Prof. Jacques Flouquet (INAC/SPSMS CEA-Grenoble)
- date
- 2009年 5月 26日(火曜日) 14:30−15:30
- place
- 物理学教室 第4講義室
- abstract
- We will describe macroscopic and microscopic studies recently
performed in Grenoble. Inelastic neutron scattering experiments
give a clear view of the (P, H) response in the low pressure
hidden order (HO) phase and in the high pressure antiferromagnetic
(AF)phase. The main proposals are
- both ordered phases have the same wave vector Q=(0,0,1),
- the resonance at Q=(1,0,0) collapses when superconductivity (SC)collapses.
An amusing effect is the H reentrance of HO from AF as in this
Ising type system. AF does not disappear via metamagnetism.
Other examples of H reentrance phenomena in heavy fermion
systems will be briefly reported: AF in SC (CeRhIn5) - SC in the ferromagnet URhGe
- contact
- 石田憲二(kishida@sc
phys.kyoto-u.ac.jp・内線 3752)
- note
-
GCOE・基研セミナー(宇宙)
- title
- “Gravitational self-force”(with application to extreme-mass-ratio binary inspirals)
- author
-
Leor Barack (University of Southampton)
- date
- 2009年 5月14日(木) 4:00 p.m. 〜
- place
- 京都大学基礎物理学研究所 湯川記念館・大会議室Y206
- abstract
-
The radiative inspiral of compact stellar-mass objects into
massive black holes in galactic nuclei is a key source for
LISA - the proposed space-based gravitational wave observatory.
Each of these inspiralling objects is an extremely effective probe
of the strong-field geometry of the central black hole, and its
gravitational wave signal encodes a wealth of detailed information
about this geometry. Decoding this information will require
accurate theoretical templates of the gravitational waveforms,
which, in turn, requires an accurate model of the orbital evolution.
The inspiral dynamics can be described in a perturbative fashion
in terms of an effective gravitational self-force. Knowledge of the
local self force acting on the inspiralling body is an important
prerequisite in the program to model astrophysical inspirals.
I will begin this talk by reviewing the general theory of the
gravitational self-force in curved spacetime, and proceed to describe
how this theory is being applied today in actual calculations of the
self force for inspiral orbits. As a particular application, I will
present a recent calculation of the shift in the location and
frequency of the ISCO (innermost stable circular orbit) of a
Schwarzschild black hole due to the conservative piece of the
gravitational self force.
- contact
- note
-
このセミナーは京都大学基礎物理学研究所と京都大学理学研究科
グローバルCOEプログラム「普遍性と創発性から紡ぐ次世代物理学」の共催で行われます。
GCOEセミナー
- title
- 非自明な磁気構造に由来する新規異常ホール効果の理論
- author
-
紺谷 浩 准教授(名古屋大学 理学研究科)
- date
- 2009年 4月 30日(木曜日) 10:00−11:30
- place
- 物理学教室 401号室
- abstract
-
フラストレート系では、非自明な磁気秩序の出現に伴い、しばしば
非従来型の異常ホール効果が出現する。本講演ではt 2g軌道強束縛模型に基づき
この問題を解析する。一般に磁気秩序がnon‐collinear
であるとき、「軌道ベリー位相」を有効磁場とする非従来型の異常ホール効果が出現し、
Nd2Mo2O7の実験結果を良く再現することがわかった。様々な多軌道フラスト
レート系における本機構の実現が期待される。
- contact
- 前野 悦輝(Y. Maeno, maeno@scphys.kyoto-u.ac.jp 内線:3783)
- note
-
GCOEセミナー
- title
- Emergent electronic states in superconductors on the border of magnetism
- author
-
Professor Christos Panagopoulos
(Department of Physics and FORTH, University of Crete, Heraklion, Greece and
Department of Physics and Applied Physics, Nanyang Technological University, Singapore)
- date
- 2009年4月16日(木曜日) 10:00 - 11:30
- place
- 物理学教室 401号室
- abstract
-
I will discuss the emergence of novel electronic states of matter as probed by
several experimental techniques. These states lead to a common phase diagram
in several unconventional superconductors on the border of magnetism, including
heavy fermions and copper oxides. Key features directing new materials towards
unconventional high temperature superconductors will be addressed.
- contact
- 前野 悦輝(Y. Maeno, maeno@scphys.kyoto-u.ac.jp 内線:3783)
- note
-