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Yasunori Nomura works on theoretical physics, in particular theoretical particle physics, cosmology, quantum gravity, and quantum information. His current research focus includes the black hole information problem, holographic descriptions of spacetime, and multiverse cosmology.
One of the most important problems in theoretical physics is to reveal the quantum theory of spacetime and gravity. This has indeed been addressed for long, but it is only recently that some of the key ingredients are being clarified. In particular, this has brought a new connection between quantum gravity and quantum information science through the concept of holography: the idea that quantum gravity is formulated as a theory of lower dimensional quantum systems. One of my current scientific focuses is to understand this connection better.
I have recently been developing a holographic description of spacetime beyond the conventional framework called the Anti-de Sitter (AdS)/Conformal Field Theory (CFT) correspondence [1,2]. In particular, I found a way of relating the so-called tensor network descriptions of quantum states to a certain geometric flow in general spacetime. I have also advanced understanding of the long-standing black hole information puzzle [3,4,5]. In particular, I introduced the idea that the well-known thermality of black holes results from chaotic entanglement between hard and soft modes near the horizon region, which sheds new light on the way black holes process quantum information.
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Journal of High Energy Physicsno. 2 (2024): 1-46
arxiv(2024)
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