Conveners
Morning 3: Session 3
- DMITRY BUDKER (Helmholtz Institute Mainz)
-
Surjeet Rajendran18/09/2024, 09:00Talk
It is sometimes claimed that the Strong CP problem can be solved by invoking mechanisms that impose CP as a symmetry of the theory. I will argue that these solutions do not work. The strong CP problem arises from the fact that the CP invariant QCD Hamiltonian possesses states that violate CP. It is thus a problem of state selection - why are we in a state of QCD which respects CP even though...
Go to contribution page -
Caterina Braggio (Istituto Nazionale di Fisica Nucleare)18/09/2024, 09:25Talk
We report about a significant advancement in the search speed of axion dark matter with cavity-based haloscopes. Our approach combines a 3D cavity with a transmon-based single microwave photon counter (SMPD) devised to detect itinerant photons, a circuit-QED architecture compatible with the strong magnetic fields required for axion-to-photon conversion.
Go to contribution page
In the SMPD, an incoming photon is... -
Kan Nakazono (The University of Tokyo)18/09/2024, 09:45Talk
We propose and experimentally demonstrate a novel method for cavity frequency tuning in cavity haloscope experiments by coupling with a superconducting qubit. Compared to the existing tuning-rod approach, this alternative method addresses a few advantages: (a) easy implementation, (b) reduction of electromagnetic wave leakage, and (c) fast scanning because there is no thermal noise derived...
Go to contribution page -
Eike Ravensburg (SDU Odense)18/09/2024, 10:05Talk
Supernova (SN) explosions could emit vast amounts of axions, and axionlike particles, in a short time. In this talk, we will show how the spectrum of these axions is calculated to unprecedented precision in recent years. In particular, in the SN plasma quantum-loop effects can dominate axion production or absorption processes, and can also play a vital role in their conversion to visible...
Go to contribution page -
Dr Jinsu Kim (IBS-CAPP)18/09/2024, 10:25Talk
Axion quark nuggets are hypothetical particles composed of (anti-)quarks in a unique phase called the color superconducting state, surrounded by an axion domain wall. This model proposes an alternative candidate for cold dark matter compared to conventional halo-axions. Under the hypothesis that anti-matter axion quark nuggets could annihilate with Earth matter, releasing relativistic axions,...
Go to contribution page -
Dr Maximiliano Silva-Feaver (Yale University)18/09/2024, 10:45Talk
The axion is a well-motivated dark matter candidate with an extensive range of mass unexplored experimentally. New string production models for the post-inflation QCD axion predict higher axion masses than we have explored with modern haloscopes. While traditional tunable cavity-based haloscopes have proven exquisitely sensitive at lower frequencies, their sensitivity drops off at higher...
Go to contribution page -
Xiran Bai (Yale University)18/09/2024, 11:30Talk
The Haloscope At Yale Sensitive To Axion CDM (HAYSTAC) Experiment is actively searching for QCD axions using a resonant microwave cavity enhanced by a quantum squeezed state receiver (SSR). Because the axion’s mass and coupling strength are unknown, a crucial metric is the scanning rate across the parameter space. Integration of the SSR into the HAYSTAC experiment has allowed for a scan rate...
Go to contribution page -
Elisa Todarello (Turin University)18/09/2024, 11:50Talk
The nature of dark matter in the Universe is still an open question in
Go to contribution page
astrophysics and cosmology. Axions and axion-like particles (ALPs) offer a
compelling solution, and traditionally ground-based experiments have eagerly,
but to date unsuccessfully, searched for these hypothetical low-mass particles
that are expected to be produced in large quantities in the strong
electromagnetic... -
Peter Graham, Surjeet RajendranOverview lecture