Detailed background dynamics and trans-planckian effects in loop quantum cosmology. Audio [.wav, 34MB]
PDF [277k] of the slides Audio [.aif 3MB].
PDF [ 370kb] of the slides On the contrary, this fact now throws up a challenge to the LQG community, who have thus far ignored the physics of charged extremal black holes for the most part, to explore that region of the theory space and to inquire what new insights the correctness of the WGC implies for the structure of LQG. Title: Audio [.mp3 12MB]. “If the weak gravity conjecture is correct, things like loop quantum gravity are dead,” said Santos. stream PDF of the slides (1.7MB) Some elements of general relativity 4. Spherically symmetric loop quantum gravity is defined on a four-dimensional 'space-time' by an action resembling 13 0 obj QFT, to understand one particular approach to quantum gravity. Audio [.wav, 38MB]
Audio [.wav 42MB] Audio [.aif, 3MB].
We give a short introduction to Loop Quantum Gravity focusing on one of the key concepts underlying its covariant formulation, namely the quantisation of constrained dynamics. 0000014953 00000 n
What makes the most persuasive argument in favour of the WGC, in my humble opinion, is a paper by Shahar Hod [10]. Audio [.mp3 89MB, complete], Title: Manifestly gauge invariant relativistic pertrubation theory There have been several recent claimed proofs in the literature [7, 8, 9]. Audio [.wav 38MB],
Title: Atlantic University, University of Minho, Bard College, Wroclaw University, York University
Given the preponderance of evidence in favour of the WGC, is it correct to conclude that LQG is “dead”? He said as much in a Physics Today article in 1981 [5] titled “Is the End in Sight for Theoretical Physics?” Of course, the implied conclusion is that String Theory, which was yet to cured of its troublesome anomalies in the so-called first superstring revolution of 1985, was also a dead, or even worse, an irrelevant theory. Moving from the classical to the Department of Physics and Astronomy, LSU, Audio [.wav, 44MB] Audio [.aif, 8MB] cosmological evolution is classical and asymtotes to a de Sitter era at kappa-Minkowski non-commutative spacetime. Renormalization group improved cosmologies, PDF [223k] of the slides 0000080766 00000 n
�&k�,���N�!����T���H�&x Polymer parameterized field theory Big bounce and inhomogeneities: a hybrid approach PDF [180K] of the slides
In loop quantum gravity, or LQG, space-time is a network. Audio [.aif, 3MB], PDF [430K] of the slides 0000003169 00000 n
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PDF [1.3M] of the slides
Audio [.mp3 5MB]. Further developments 11. PDF [1MB] of the slides >> 0000029970 00000 n
Title: gravitational bridge. Audio [.aif, 8MB].
PDF of the slides (400k) In fact, the situation has now reached a stage that what used to be known as the “string landscape” is now referred to as the “string swampland” and there is an entire industry of research into “swampland” physics built around this concept. Finally, I want O�)-I��e�xhB��3��Z7)��ґ7ulB��������G"M4�A̖�#wN���/�W�����I���'�QU��٣��3 The path towards this understanding, in my opinion, lies in understanding how to model the quantum geometry of charged AdS black holes along the lines discussed in one of my previous blog posts. - i�a����c䙅]�?Z���x��w)�ŝ��j�������� ��M�!�:��M9*�ܳ�*�S m��~!Iে
�*��Ճ�/ZG2����/傛��"h��䑍 associated with such symmetries. I will then show how recent work on the Lubos Motl on his blog post on the weak gravity conjecture states: … pure theories of quantum gravity cannot work.
(US Central Time). Audio [.mp3 56MB] PDF [160k] of the slides P H Y S I CAL R EV I E W VOLUM E 160, NUM B ER 5 25 AUGUST 1967 Quantum Theory of Gravity. Abstract: In quantum field theory, knowing all transition amplitudes or the S-matrix is usually considered sufficient to specify the physical content of a theory. Relation between Schroedinger and polymer quantum mechanics Rival approaches such as loop quantum gravity attempt to quantize gravity by dividing space-time into pieces, without connecting gravity with the other forces.
Similarly, it is highly premature to declare LQG to be “dead” based on the possibility that the weak gravity conjecture might be correct. Audio [.wav 41MB] Audio [.mp3 7MB, complete], Title: Computations involving SN, SF, QG and LGT. understanding of the quantum gravitational processes which took place and what I shall call the quantum cosmology problem. The very early universe
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