应6163银河net163am刘玉孝教授邀请，华东师范大学6163银河net163am薛迅教授来我院访问，并做学术报告。欢迎广大师生届时参加！

题目：Large Scale Lorentz Violation Gravity and Dark Energy

时间：2018年8月5日上午9:30

地点：齐云楼525

报告摘要：

The accelerating expansion of universe can be described by the non-zero cosmological constant or the dark energy. However, the origin of the dark energy remains a mystery of modern physics. The local Lorentz invariance is the most exact symmetry of the Nature on the one hand, but all quantum gravity theories predict Lorentz violation on the other hand. The local Lorentz violation induced by the quantum gravity at the very early universe may be transformed into large scale by inflation. Combining the low-$l$ anomalies of the CMB spectrum, we propose that the local Lorentz invariance may be broken at the large scale. We construct the effective gravity at the cosmic scale with a local $SO(3)$ symmetry. The theory exhibits non-trivial contortion distribution even with scalar matter source. The FRW like solution of the theory is analyzed and the contortion distribution contributes a dark energy like effect which is responsible for the accelerating expansion of the universe. It reveals that the dark energy may be the remnants of quantum gravity in this sense.

报告人简介：

薛迅 华东师范大学6163银河net163am教授、博导

1998年12月至今，华东师范大学物理系，教师

1993年3月-1998年12月，中山大学高等学术研究中心，教师

1991年3月-1993年3月，复旦大学物理系博士后

1990年12月中山大学博士

1988年2月中科院理论物理研究所硕士

1984年7月北京大学力学系学士