4th Intensive Lectures by Quantum Gravity Gatherings
2023 August 21, 22, 23 @ RIKEN, Wako, Japan
This is the fourth event by the Quantum Gravity Gatherings (QGG) Study Group at RIKEN iTHEMS. For this event we have invited Prof. Yuki Sato, National Institute of Technology, Tokuyama College, to give pedagogical lectures on the causal dynamical triangulations approach to quantum gravity. We wish this event to provide insights to researchers in related fields.
The causal dynamical triangulations formalism appears to be one of the most promising constructive approach to quantum gravity: possessing deep links with the asymptotic safety programme and Hořava-Lifshitz gravity, causal dynamical triangulations appears to avoid many of the well-known pathologies characteristic of its Euclidean analogue. As an example the emergence of spacetime geometry remains possible in various spacetime dimensions. While many of the results in higher dimensions are understood only at the numerical level, the analytical study of the approach in two spacetime dimensions is relatively well developed; Yuki Sato is a leading expert on these latter developments and we are very lucky he has agreed to present the understanding of 2D causal spacetime coming from this approach in a manner consistent with the Quantum Gravity Gatherings philosophy.
This intensive lecture series is intended to be a lively and participatory event, not just a listening experience. For this reason, the number of participants will be limited to about 30 with priority given to graduate students and young post-docs; the intensive talk will be given in a face-to-face blackboard style (in English, no online streaming) to allow for informal and lively Q&A discussions. The program will also include short talk sessions, where interested participants can give a 5 min talk on a topic of their choice (their research, reviews on some works, what they want to study in the future, etc.).
Registration
Registration Form- The registration deadline for all participants is 8th August (Tue). However, if the number of registered participants exceeds the capacity of the event room, we may need to close registration prior to the specified deadline.
- Participants are strongly encouraged to give a short talk on any topic of their choice (self-introduction, research, review of some works, what they want to research in the future, etc.). This interactive session is designed to foster a lively and engaging environment, facilitating increased communication and knowledge exchange among all participants.
- We can partially support the expenses for junior participants. Note that:
- giving a short talk is mandatory for those receiving support and for students who will attend a banquet.
- we have a limited number of accommodations available for participants residing in remote areas. Please note that the check-in date is fixed for August 20 and the check-out date is set for August 23, and unfortunately, these dates cannot be changed.
Intensive Talk
Yuki Sato (National Institute of Technology, Tokuyama College)
Title: Elementary Introduction to 2D Causal Dynamical Triangulations
I plan to explain the basics of causal dynamical triangulations (CDT), in particular focusing on analytical calculations in two spacetime dimensions. 2d CDT is a Lorentzian lattice model of quantum geometries which is simple enough to be treated analytically and complex enough to show non-trivial quantum nature of spacetime. It is known that the continuum limit of 2d CDT is in the same universality class of the so-called 2d projectable Hořava-Lifshitz quantum gravity. Understanding this relation is the main part of my lectures. Additionally, the generalized CDT model that includes all possible wormhole configurations is also shown. The contents of the lectures include:
1. Lorentzian Regge calculus in arbitrary dimensions
2. 2d CDT and its continuum limit
3. Hořava-Lifshitz quantum gravity and the relation to CDT
4. Generalized CDT and Coleman's mechanism
Program
August 2110:00~11:00 Talk1
11:00~11:30 Coffee break
11:30~12:30 Talk2
12:30~14:00 Lunch
14:00~15:00 Talk3
15:00~16:00 Coffee break
16:00~17:00 Talk4
17:00~18:00 Short talk (short talk program)
18:30~ Banquet
August 22
10:00~11:00 Talk5
11:00~11:30 Coffee break
11:30~12:30 Talk6
12:30~14:00 Lunch
14:00~15:00 Talk7
15:00~16:00 Coffee break
16:00~17:00 Talk8
17:00~18:00 Short talk session2
August 23
10:00~11:00 Talk9
11:00~11:30 Coffee break
11:30~12:30 Talk10
12:30~14:00 Lunch
14:00~15:00 Talk11
15:00~16:00 Coffee break
16:00~17:00 Talk12
17:00~18:00 Short talk session3
Place
435-437 Seminar Room, 4F of Main Research Building, RIKEN Wako CampusOrganizers
Che-Yu Chen (iTHEMS)Yuta Hamada (KEK)
Puttarak Jai-akson (iTHEMS)
Christy Kelly (iTHEMS)
Ryo Namba (iTHEMS)
Toshifumi Noumi (The University of Tokyo)
Naritaka Oshita (Kyoto Hakubi/iTHEMS)
Sotaro Sugishita (YITP)
Yuki Yokokura (iTHEMS)
Contact: Christy Kelly christy.kelly@riken.jp/ Naritaka Oshita naritaka.oshita@yukawa.kyoto-u.ac.jp
Sponsors
