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날짜 2023-09-13 16:00 
일시 Sep.13 (Wed), 4PM 
장소 E6-2, #2502 
연사 Sung Mook Lee (KAIST) 
We are delighted to announce the upcoming High-Energy Theory Seminar by Dr. Sung Mook Lee who joined KAIST recently as a postdoctoral fellow.
The seminar will take place today Wednesday (Sep 13) at 4PM at E6-2, #2502 and you are all invited to participate. 
 
Speaker: Sung Mook Lee (KAIST)
Time: Today, September 13 (Wednesday), 4PM
Place: E6-2, #2502
 
Title: Cosmic Birefringence from Dark Photon
 
Abstract:
Recent findings of isotropic cosmic birefringence within CMB have sparked interest in exploring potential indications of parity violation in our universe. The prevailing interpretation is the existence of an axion background, a concept I will briefly review. On the other hand, my focus in this presentation will be the intriguing possibility of kinetic mixing between the CMB photons and birefringent dark photons as the underlying cause of cosmic birefringence. During this discussion, I will demonstrate that indeed the birefringence of the dark photons can influence the polarization of CMB photons even though this effect may not be uniformly distributed. Furthermore, our result sheds light on the pivotal role played by kinetic mixing in generating two fundamental attributes of the CMB: circular polarization and spectral distortion. This presentation is based on 2307.14798.
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361 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
360 2018-12-16 16:00  E6-2. 1st fl. #1323  Lectures on 2d Conformal Field Theory file
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358 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
357 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file
356 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
355 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file
354 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
353 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
352 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
351 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
350 2019-03-26 15:00  E6-2. 2st fl. #2501  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
349 2019-03-29 14:30  E6-2. 1st fl. #1323  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
348 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
347 2019-04-04 16:00  #1323, E6-2  Chiral spin-photon interaction at nanoscale file
346 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
345 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
344 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file