Last Update 2018/04/25
I am a theoretical physicist, working mainly on particle physics and cosmology. In the past two decades, our understanding of the universe has improved dramatically, which includes the Nobelawarded discovery of the accelerated expansion. Also, recent progresses in quantum gravity are revealing remarkable natures of spacetime and gravity, beyond what we can learn from quantum eld theory in curved spacetime. These new developments together suggest a surprising picture of the“ quantum multiverse”: our universe may be one of the many universes in which low energy physical laws take different forms, and that quantum mechanics plays a crucial role in describing these many universes even at the largest distance scales. I am pursuing what this new picture implies for fundamental aspects of quantum gravity as well as for future cosmological observations. I also study related questions in quantum gravity, such as the information problem in black hole physics.
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