logo

korean english

게시판

Home > 게시판 > 세미나

입자이론물리 그룹에서 KIAS의 박미옥 박사님과 서강대학교 양현석 교수님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다.

=========================================================================

Date/time: 2018. 12. 21(Fri.) 15:00

 

Place: Room number 31317

 

Speaker: Dr. Miok Park (KIAS)

 

Title: Quasilocal Smarr Relations

 

Abstract:  A quasilocal Smarr relation is obtained from Euler’s theorem for n-dimensional
asymptotically flat spacetimes and it is checked through several examples by calculating
quasilocal variables using the Brown-York quasilocal formalism, along with Mann-Marolf
counterterms. To find the entropy in the quasilocal frame, we define a quasilocal free energy from the Euclidean gravity action with a Tolman temperature. We discovered that the quasilocal free energy definition is not altered by a surface pressure term, and the entropy obtained through this method agrees with the usual Bekenstein-Hawking entropy. We also check that the quasilocal free energy combined with the quasilocal Euclidean action value is consistent with our quasilocal Smarr relation.

=========================================================================


Date/time: 2018. 12. 21(Fri.) 16:30

 

Place: Room number 31317

 

Speaker: Prof. Hyun Seok Yang (Sogang University)

 

Title: Expanding Universe and Dynamical Compactification Using Yang-Mills Instantons

 

Abstract:  We consider an eight-dimensional Einstein-Yang-Mills theory to explore whether Yang-Mills instantons formed in extra dimensions can induce the dynamical instability of our four-dimensional spacetime. We show that the Yang-Mills instantons in extra dimensions can trigger the expansion of our universe in four-dimensional spacetime as well as the dynamical compactification of extra dimensions. We also discuss a possibility to realize a reheating mechanism via the quantum back-reaction from the contracting tiny internal space with a smeared instanton.


=========================================================================






번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1089495
196 <6/19> 초전도 특별세미나 2012.06.11 101099
195 <5/18> Three magics to hold an atom without perturbation 2011.05.09 101205
194 <5/12(월)> Nanoscale probing of electrochemical phenomena and ionic dynamics by scanning probe microscopy 2014.05.07 101430
193 <11/14> Resonance collective mode in novel superconductors 2008.11.11 101505
192 <11/11> Revealing magnetism of nanoislands with quantitative insights into spin-polarized scanning tunneling spectroscopy 2013.11.05 101555
191 <6/5> BK 석학초청 특별강연 - How Well Does High Field Specific Heat Probe the Nodal Nature of the Multi- 2012.05.14 101635
190 <7/20(Fri.) 4:00pm>Manufacturing next generation cryogen-free 1.5T MRI and cryogen-free NMR 2018.07.16 102451
189 <5/11>Emergent Geometry as Quantum Gravity 2009.05.07 102463
188 <2/27> Carbon nanotubes as Electron Sources 2006.02.21 102787
187 <2/8(Fri) 11:0 am ~ >Intertwined states in the pure and Nd-doped heavy fermion superconductor CeCoIn5 2019.02.08 102805
186 <12/19> The BLG Theory in Light-Cone Superspace 2009.12.15 102819
185 영어초록 예시 2008.03.18 102934
184 <2/14> Complex network models for mobile ad hoc networks 2011.02.11 103119
183 <7/15> Experiment for Discoveries of Extrasolar Planets 2009.07.13 103180
182 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 103526
181 <10/22(Tue.)>To p or not to p? – 17O NMR of Sr2RuO4 under strain file 2019.10.17 103534
180 <Oct.20(Tue) 16:00> Electromagnetic Response and Thermomagnetic Instabilities in Three-Dimensional Nanostructured Superconductors file 2015.10.15 104008
179 <5/11> Hybrid Josephson Junctions of Various Nanostructures 2011.05.04 104283
» <12/21(Fri) 3:00pm ~ > Quasilocal Smarr Relations / Expanding Universe and Dynamical Compactification Using Yang-Mills Instantons 2018.12.17 104567
177 <10/10> Spin transistor : Detection and manipulation of spin transport in semiconductor 2012.09.27 104922