


Mathematical Horizons for Quantum Physics
(28 Jul  21 Sep 2008)
... Jointly
organized with Centre for Quantum Technologies, NUS
Partially supported by Lee Foundation and
Faculty of Science, NUS
Organizing Committee
· Confirmed Visitors
· Overview
· Activities · Membership Application
 Huzihiro Araki (Kyoto University)
Cochairs
 Berthold Georg Englert (National University of
Singapore)
 Leong Chuan Kwek
(Nanyang Technological University and
National University of
Singapore)
Secretary
 Jun Suzuki (National Institute of Informatics, Japan)
 Bess Yiyuan Fang (National University of Singapore)
Quantum theory is one of the most
important intellectual developments in the early twentieth
century. Since then there has been much interplay between
theoretical physics and mathematics, both pure and applied.
Arguably, the field of Mathematical Physics, equally at home
in mathematics and in physics, emerged from John von
Neumann’s seminal work on the spectral theory of linear
operators in Hilbert space which was triggered by the birth
of quantum theory in the mid 1920s. Yet this is just one
historical example of how the mathematical insights and
tools that are developed in the course of answering
challenging mathematical questions arising from physical
problems have contributed to the advance of both mathematics
and physics. In this tradition, it is the objective of this
IMS Programme to bring together Mathematicians, whose work
has a bearing on quantum physics, with researchers in
Mathematical Physics and Theoretical Physics, whose work
will benefit from the mathematical progress. The
collaboration between these scientists of different
background, different expertise, and different scientific
culture will bear fruit on the research of all participants
by intellectual crossfertilization.
In quantum physics, the
observables are represented by (selfadjoint) linear
operators on a Hilbert space, and states of the system are
described as normalized positive linear functionals on an
operator algebra. In the historically earliest stage, the
spectrum of light emitted from atoms was explained by the
spectral analysis of atomic Hamilton operators, and these
investigations developed into the broad research field of
Schrodinger operators. The modular theory of operator
algebras brought about new contact points between
mathematics and physics, which turned out to be beneficial
for vast developments both in Mathematics and Theoretical
Physics. Operator algebra theory became quite powerful and
its applications in other branches of mathematics is
described by the adjective “noncommutative.” An example is
probability theory, widely used in classical physics. The
noncommutative probability theory is now well developed,
typically called free probability theory, which has its
earliest origin in Wigner’s analysis of the spectrum of
heavy atoms and is mathematically rooted in operator algebra
theory.
In summary, Operator Theory and Operator Algebra Theory form
the mathematical basis of Quantum Physics and provide the
indispensable mathematical language for theoretical studies
in Quantum Physics. Not only are they used in Quantum
Physics as powerful tools, but also they are often directly
influenced by problems which arise in Quantum Physics. Thus,
the unifying mathematical theme of the Programme is NonCommutative
Analysis.
The Programme will consist of four
overlapping threeweek Sessions, each devoted to a selected
topic. In Session 1, the problem of bringing a given state
to a
target state by perturbing the interaction with a
timedependent external laser field is studied as a typical
subject of quantum control. The specific form of problems in quantum control
can stimulate a new development of noncommutative analysis
in addition to solving physical problems. The random matrix,
whose connection with quantum chaos is being studied, is a
typical subject of noncommutative probability theory. (Note
that probability theory and analysis are very closely
related, especially free probability theory is based on
operator algebra theory.)
Session 2 is devoted to operator algebras in quantum
information, which is a non commutative analysis.
Equilibrium statistical mechanics has been developed with
full use of operator algebra theory, giving a strong
influence backward. The same is expected of the subject of
Session 3, which is nonequilibrium statistical mechanics.
Session 4 deals with relativistic extensions of the
traditional Schrödinger operator
theory when one is mainly concerned with atoms, molecules
and solids on one hand, and deals with the operator algebra
description of a system of infinitely many degrees of
freedom when one is mainly concerned with the quantized
radiation field. Both are cases of noncommutative analysis,
mathematically speaking. Programme
Structure Each Session has a Session
Organizer who is in charge of defining the Session and the
selection of the Discussion Leaders and the participants. At
the start of each Session, there will be presentations by
the Discussion Leaders to lay the groundwork. There follows
an intense period of about 20 days of discussions and close
collaborations among the participants. The Session ends with
talks summarizing the progress accomplished and a
roundtable discussion defining future problems and areas of
close collaboration.
Overall Programme Coordinator: Prof. Huzihiro Araki (University
of Kyoto)
Session 1: Quantum Control and Dynamics
Topical Problems
 Molecular quantum control
 Discussion Leaders: Arne Keller (Universite
ParisSud), and HansRudolf Jauslin (Université de
Bourgogne)
 Quantum chaos
 Discussion Leader: Stephan DeBievre (UFR de
Mathématiques et Laboratoire CNRS Paul Painlevé)
 Laserdriven models in quantum computing systems
 Discussion Leader: Goong Chen (Texas A&M University)
Report of Session 1:
PDF
Session 2: Operator Algebras in Quantum Information
 Period: 11–31 August 2008 (weeks 35)
 Organizers: Burkhard Kümmerer
(Technische Universität Darmstadt), Hans Maassen (Radboud University, Nijmegen)
Topical Problems
 Entropy in quantum channels and the problem of additivity of quantum capacity
 Discussion Leader: Alexander Holevo
(Steklov Mathematical Institute)
 Stability of quantum algorithms in the presence of external noise
 Discussion Leader: Mark Fannes (Katholieke Universiteit Leuven)
 Entanglement of multipartite and infinite systems
 Discussion Leader: Reinhard Werner (Technische Universität Braunschweig
Report of Session 2: PDF
Session 3: Nonequilibrium Statistical Mechanics
Topical Problems
 Large deviation theory for quantum fluctuations
 Discussion Leader: Jan Derezinski (University of
Warsaw)
 Nonequilibrium steady states
 Discussion Leader: Claude Alain Pillet (Université du Sud ToulonVar)
Report of Session 3:
PDF
Session 4: Strongly Interacting ManyParticle Systems
 Period: 1–21 September 2008 (weeks 68)
 Organizer: Heinz Siedentop (LudwigMaximiliansUniversität München)
Topical Problems
 The theory of large atoms, molecules, and solids
 Discussion Leaders: Heinz Siedentop (LudwigMaximiliansUniversität München), Volker Bach (Johannes GutenbergUniversität Mainz)
 The mathematical description of the radiation field and its interaction with matter
 Discussion Leaders: Heinz Siedentop (LudwigMaximiliansUniversität München), Volker Bach (Johannes GutenbergUniversität Mainz)
Report of Session 4 :
PDF
Public Lectures
Title: Knot or not Knot?
Date & Time: 13 Aug 2008, 6:30pm  7:30pm
Speaker: Burkhard Kümmerer, Technical University of Darmstadt, Germany
Venue: LT31, Block S16,
Science Drive 1, Singapore 117543
Title: Are Quantum Computers The Next Generation Of Supercomputers?
Date & Time: 27 Aug 2008, 6:30pm  7:30pm
Speaker: Reinhard Werner, Technische Universität Braunschweig, Germany
Venue: LT31, Block S16,
Science Drive 1, Singapore 117543
For attendance at these activities, please complete the
online registration form.
The following do not need to register:
The Institute for Mathematical Sciences
invites applications for membership for participation in the
above program. Limited funds to cover travel and living
expenses are available to young scientists. Applications
should be received at least three (3) months before the
commencement of membership. Application form is available in
(MSWordPDFPS) format for download.
 More information is available by writing to:
 Secretary
Institute for Mathematical Sciences
National University of Singapore
3 Prince George's Park
Singapore 118402
Republic of Singapore
 or email to imssec(AT)nus.edu.sg.
For enquiries on scientific aspects of the program, please
email Jun Suzuki at
physj(AT)nus.edu.sg.
Organizing Committee
· Confirmed Visitors
· Overview
· Activities · Membership Application 
