2023-03-14
11:04 |
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Long baseline atom interferometry
/ Kasevich, Mark (speaker) (Stanford University)
Recent advances in methods to coherently manipulate atomic de Broglie waves have enabled a new generation of atom interferometers with unique capability to address outstanding fundamental science challenges. These challenges include detection of gravitational radiation at frequencies below 1 Hz, searches for ultralight dark matter, and new tests of gravitational physics. This talk will describe recent progress in this field and outline future scientific opportunities.This is special Colloquium part of the “Terrestrial Very-Long-Baseline Atom Interferometry Workshop” (13-14 March 2023) with a short introduction to the Workshop at 08:45.The Colloquium is officially starting at 09:15..
2023 - 0:58:09.
CERN Colloquium
External link: Event details
In : Long baseline atom interferometry
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2023-02-24
10:27 |
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The New Science of the Heart
/ Harding, Sian (speaker) (Imperial College London)
Sian Harding is Emeritus Professor at Imperial College London. She has been Head of the Cardiovascular Division there, and Director of the British Heart Foundation Cardiovascular Regenerative Medicine Centre. [...]
2023 - 1:08:16.
CERN Colloquium
External link: Event details
In : The New Science of the Heart
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2023-01-30
08:38 |
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The science and technology of DUNE
/ Terranova, Francesco (speaker) (Universita & INFN, Milano-Bicocca (IT))
The DUNE experiment is one of the most ambitious projects ever conceived in neutrino physics and is currently under construction at Fermilab and SURF. Its science addresses neutrino oscillations with a wide-band accelerator neutrino beam, together with astroparticles, multimessenger physics, and physics beyond the Standard Model using natural sources. [...]
2023 - 0:54:47.
CERN Colloquium
External link: Event details
In : The science and technology of DUNE
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2022-12-16
15:23 |
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Prospects for Fusion Energy using Magnetic Confinement
/ Zohm, Hartmut (speaker) (Max-Planck-Institut für Plasmaphysik) ; Mumgaard, Bob (speaker) (Commonwealth Fusion System)
Nuclear Fusion is the process that powers the stars. Research to make this process accessible as an energy source on Earth by confining a hot hydrogenic plasma in magnetic fields has made substantial progress. In this talk, we will first introduce the principles of magnetic confinement and then review the present status of research. [...]
2022 - 1:10:17.
CERN Colloquium
External link: Event details
In : Prospects for Fusion Energy using Magnetic Confinement
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2022-11-18
12:47 |
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The Practice and Sociology of Natural Science
/ Peebles, James (speaker) (Princeton University)
Lessons about research in the natural sciences can be drawn from the sociology of science. For example, in 1960 Einstein's general theory of relativity was standard and accepted physics, and elements of it were on the qualifying exam I wrote as a graduate student. [...]
2022 - 1:24:34.
CERN Colloquium
External link: Event details
In : The Practice and Sociology of Natural Science
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2022-10-31
08:35 |
Small Cosmological Constants in String Theory
/ McAllister, Liam (speaker) (Cornell University)
I will present a construction of vacua of string theory in which the magnitude of the cosmological constant is exponentially small. The vacua are supersymmetric AdS solutions in flux compactifications of type IIB string theory, with all moduli stabilized. The vacuum energy is small because we ensure the exact cancellation of all perturbative contributions, through an explicit choice of integer parameters determined by the topology and quantized fluxes. The nonperturbative contributions that remain are exponential in these integers. Finding cosmological constants of small magnitude in this landscape is exponentially easier than in Bousso-Polchinski landscapes, but extending our approach to positive cosmological constants in realistic universes is a difficult open problem..
2022 - 1:15:34.
Theory Colloquia
External link: Event details
In : Small Cosmological Constants in String Theory
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2022-09-30
15:25 |
The large charge expansion
/ Reffert, Susanne (speaker) (Universitaet Bern (CH))
Over the last few years, it has become clear that working in sectors of large global charge leads to significant simplifications when studying strongly coupled CFTs, theories which are otherwise often inaccessible to analytic methods. It allows us in particular to calculate the CFT data as an expansion in inverse powers of the large charge. In this talk, I will introduce the large-charge expansion via the simple example of the O(2) model and will then generalize it to the O(N) vector model which displays a richer structure due to its non-Abelian global symmetry group. [...]
2022 - 1:03:02.
Theory Colloquia
External link: Event details
In : The large charge expansion
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2022-08-29
13:59 |
Wormhole effects in quantum black hole physics
/ Stanford, Douglas (speaker) (Stanford University)
A powerful idea in theoretical physics is the conjecture that (from a distance) black holes behave like ordinary quantum systems. Thought of in this way, black holes display many deep quantum phenomena in simple but often surprising ways. [...]
2022 - 1:09:04.
Theory Colloquia
External link: Event details
In : Wormhole effects in quantum black hole physics
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2022-07-07
14:25 |
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2022-07-06
07:58 |
Nuclear Arms Control: Help wanted
/ von Hippel, Frank N. (speaker) (Princeton University)
During World War II, Niels Bohr met with both President Roosevelt and Prime Minister Churchill to warn them that a nuclear arms race was likely if the Soviet Union were not engaged immediately in consultations on how nuclear weapons could be controlled after the war.
Physicists played critical roles in informing the negotiators of all post-war nuclear arms control agreements, especially those limiting nuclear testing and ballistic missile defenses. [...]
2022 - 1:26:16.
CERN Colloquium
External link: Event details
In : Nuclear Arms Control: Help wanted
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