PIRSA:C08015 - In Search for Variations of Fundamental Couplings and Mass Scales
Subscribe to podcast
Maxim Pospelov and Victor Flambaum
TBC
** timing issues because of Victor's visit and other conferences.
Organizer(s):
Collection URL: http://pirsa.org/C08015
Weclome and introduction
Abstract:
Date: 14/07/2008 - 10:00 am
Reference:
Speaker comments:
Tech Note:
Review of models
Abstract:
Date: 14/07/2008 - 11:00 am
Reference:
Speaker comments:
Tech Note:
Chameleon Theories
Speaker(s):
Justin Khoury - Perimeter Institute for Theoretical Physics
Abstract:
Date: 14/07/2008 - 12:00 pm
Reference:
Speaker comments:
Tech Note:
Quasar absorption line constraints on variable fundamental constants
Abstract: I will review the published quasar absorption line constraints on variations in the fine-structure constant, alpha, focusing on the apparent disagreement between those derived from Keck/HIRES and VLT/UVES spectra which have provided evidence for and against alpha variation, respectively. I demonstra...
read moreDate: 14/07/2008 - 2:40 pm
Reference:
Speaker comments:
Tech Note:
Probing the variation of fundamental constants using QSO absorption lines
Abstract:
Date: 14/07/2008 - 3:20 pm
Reference:
Speaker comments:
Tech Note:
Limits on variation of fundamental constants from microwave and infrared transitions in atoms amd molecules
Abstract:
Date: 15/07/2008 - 9:30 am
Reference:
Speaker comments:
Tech Note:
Testing the m_p/m_e cosmological variation from H_2 lines in High-Redshift QSO spectra
Abstract:
Date: 15/07/2008 - 10:10 am
Reference:
Speaker comments:
Tech Note:
In search for mu-variation: laboratory spectroscopy and astronomical observations of molecular hydrogen
Abstract:
Date: 15/07/2008 - 11:20 am
Reference:
Speaker comments:
Tech Note:
Coupling variations and equivalence principle violations in string inspired scenarios
Abstract:
Date: 15/07/2008 - 12:00 pm
Reference:
Speaker comments:
Tech Note:
Reconstructing the evolution of dark energy with the variaton of fundamental parameters
Abstract:
Date: 15/07/2008 - 2:40 pm
Reference:
Speaker comments:
Tech Note:
How to test mutiverse theories
Abstract:
Date: 15/07/2008 - 3:20 pm
Reference:
Speaker comments:
Tech Note:
Hadronic Mass Variation in Big Bang Nucleosynthesis
Abstract: I will present a brief introduction to Big Bang Nucleosynthesis theory and observation. I will then discuss BBN as a probe of hadronic mass variation in the very early universe, including comparison with the observed Li7 discrepancy. Finally I want to explore the possibility of overproducing Li6 by ...
read moreDate: 16/07/2008 - 9:30 am
Reference:
Speaker comments:
Tech Note:
Conceptual problems in phenomenological interpretation in searches for variation of constants and violation of various invariances
Abstract: At present a number of current or proposed experiments are directed towards a search for a `new physics' by detecting variations of fundamental physical constants or violations of certain basic symmetries. Various problems related to the phenomenology of such experiments will be considered.
Date: 16/07/2008 - 10:40 am
Reference:
Speaker comments:
Tech Note:
Laboratory search for temporal variations of fundamental constants with optical clocks
Speaker(s):
Ekkehard Peik - Physikalisch-Technische Bundesanstalt (PTB)
Abstract: Optical frequency standards based on forbidden transitions of trapped and laser-cooled ions have now achieved significantly higher stability and greater accuracy than primary cesium clocks. At PTB we investigate an optical clock based on the electric quadrupole transition S1/2 – D3/2 at 688 THz in...
read moreDate: 16/07/2008 - 11:20 am
Reference:
Speaker comments:
Tech Note:
Precision microwave oscillators and interferometers to test Lorentz Invariance and Local Position Invariance
Abstract: We present recent and ongoing work that uses precision frequency generation and phase measurement to test the constancy of the speed of light Local Position Invariance (LPI) and the Lorentz Invariance (LI) of the photon with respect to the Standard Model of Particle Physics under the frame work of t...
read moreDate: 16/07/2008 - 2:00 pm
Reference:
Speaker comments:
Tech Note:
Single-atom Optical Clocks and Fundamental Constants
Speaker(s):
James Bergquist - National Institute of Standards and Technology
Abstract:
Date: 16/07/2008 - 2:40 pm
Reference:
Speaker comments:
Tech Note:
High accuracy 87Sr atomic lattice clock for laboratory measurements of alpha variation.
Abstract: High precision measurements in atomic and molecular systems have reached unprecedented accuracy owing to the state-of-the-art quantum control of both light and matter. We have recently completed an evaluation of the uncertainty of our 87Sr optical lattice clock at the 1x10e-16 fractional level, surp...
read moreDate: 16/07/2008 - 3:50 pm
Reference:
Speaker comments:
Tech Note:
Stringent constraint on variation in mu from three quasar spectra
Speaker(s):
Julian King - University of New South Wales
Abstract: We have used molecular hydrogen transitions in high quality spectra of quasars Q0403-443, Q0347-383 and Q0528-250, to search for a change in the proton-to-electron mass ratio, mu. Our improvement on previous works is twofold. Firstly, we use an improved technique to calibrate the wavelength scale of...
read moreDate: 17/07/2008 - 9:30 am
Reference:
Speaker comments:
Tech Note:
Search for temporal variation of alpha in radio-frequency transitions of atomic dysprosium.
Abstract:
Date: 17/07/2008 - 10:40 am
Reference:
Speaker comments:
Tech Note:
Enhanced Sensitivity to Variation of me/mp in Molecular Spectra
Abstract: We propose new experiments with high sensitivity to a possible variation of the electron-to-proton mass ratio µ me/mp. We consider a nearly degenerate pair of molecular vibrational levels, each associated with a different electronic potential. With respect to a change in µ, the change in the split...
read moreDate: 17/07/2008 - 11:20 am
Reference:
Speaker comments:
Tech Note:
Optical lattice clocks with bosonic/fermionic Sr and with the other atomic elements
Abstract: To date, optical clocks based on singly trapped ions1) and ultracold neutral atoms trapped in the Stark-shift-free optical lattices2) are regarded as promising candidates for future atomic clocks. So far “optical lattice clocks” have been evaluated with uncertainty of 1×10-15 (ref. 3)) limited ...
read moreDate: 17/07/2008 - 2:00 pm
Reference:
Speaker comments:
Tech Note:
Nuclear binding and the light quark masses – Dynamics and constraints
Abstract: I will describe a method of understanding how the nuclear binding energies depend on the masses of the light quarks. This is useful in applications ranging from anthropic constraints to equivalence principle tests and bounds on the time variation on the quark masses.
Date: 17/07/2008 - 2:40 pm
Reference:
Speaker comments:
Tech Note:
Recent and Local Variations and Unified Models
Abstract: Precision tests of Local Position Invariance (LPI) involve many different methods in atomic, nuclear and gravitational physics, astrophysics and cosmology, and many different epochs and environments. We present some methods for comparing or combining different methods, either in a model-independent ...
read moreDate: 17/07/2008 - 3:50 pm
Reference:
Speaker comments:
Tech Note:
21 cm radiation: A new probe of fundamental physics
Abstract: New low frequency radio telescopes currently being built open up the possibility of observing the 21 cm radiation before the Epoch of Reionization in the future, in particular at redshifts 200 ≥ z ≥ 30, also known as the dark ages. At these high redshifts, Cosmic Microwave Back-ground (CMB) radi...
read moreDate: 18/07/2008 - 9:30 am
Reference:
Speaker comments:
Tech Note:
Mass Varying Neutrinos and Dark Energy
Abstract:
Date: 18/07/2008 - 10:10 am
Reference:
Speaker comments:
Tech Note:
TBA
Abstract:
Date: 18/07/2008 - 11:20 am
Reference:
Speaker comments:
Tech Note:
