QG2023 - Claus Kiefer: Common Challenges in Quantum Gravity - Problem of Time

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Does Time Exist at the Most Fundamental Level? Claus Kiefer

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prof. dr hab. Claus Kiefer - Quantum origin of the Universe

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Claus Kiefer, « Conceptual Issues in Quantum Cosmology »

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Black Holes as Open Quantum Systems | Claus Kiefer

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Claus Kiefer on QUANTIZATION

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Does the quantum mechanical wave function exist? Claus Kiefer

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Claus Kiefer: \

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Claus Kiefer (Cologne): Origin of irreversibility in the universe

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3.3. Parametrized field theories. Claus Kiefer

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Claus Kiefer (University of Cologne) \

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4. Gravity as geometry. \u0026 4.1 - 2. Claus Kiefer, Relativity and Cosmology I, WS 2021

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3. Special relativity. \u0026 3.1. Claus Kiefer, Relativity and Cosmology I, WS 2021

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Classical and quantum black holes in the Universe | prof. dr. Claus Kiefer

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3.4. Spacetime and four-vectors. Claus Kiefer, Relativity and Cosmology I, WS 2021

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NEB 15 - Claus Kiefer - Can effects of QG be observed in the CMB

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Roger Penrose: Time, Black Holes, and the Cosmos

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Leonard Susskind | \

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Paul Davies - \

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Summary and outlook. Claus Kiefer

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7.3. Emission of gravitational waves. Claus Kiefer

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