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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Stephon Alexander


Phenomenology - 3
Abstract:
Date: 25/07/2013 - 2:30 pm
Collection: Loops 13

PIRSA:12100116  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Quantum Gravity and the Weak Interactions
Abstract: Quantum Gravity and the Weak Interactions
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Non-thermal quantum black holes
Motivated by the lack of evidence for physics beyond the Standard Model in the TeV region, we ... read more
Date: 25/10/2012 - 10:20 am

PIRSA:12100126  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Cosmological Constant
Abstract: Dark Matter and Dark Energy as a Possible Manifestation of a Fundamental Scale
If we take the idea of the Planck length as a fundamental (minimum) scale and if additionally we impose the Cosmological Constant ($Lambda$) as and infrared (IR) cut-off parameter. Then ... read more
Date: 23/10/2012 - 5:10 pm

PIRSA:12100090  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Quantum Gravity Effects in the (Early and Late) Universe
Abstract: Quantum Gravity at the origin of seeds of cosmic structure?
This meeting shows a our impatience for uncovering at long last any signal of unknown physics that might have a quantum gravitational origin. I will argue that the transition from a homogenou... read more
Date: 23/10/2012 - 10:20 am

Dark Energy and Neutrino Oscillations
Speaker(s): Stephon Alexander
Abstract: In this talk I provide a model where the late time acceleration of the universe emerges from a BCS-like condensation of sterile neutrinos. This scenario can be naturally accommodated by general relativity covariantly coupled to sterile neutrinos, where the neutrinos act like an "aether" field. &... read more
Date: 15/05/2012 - 11:00 am

Emergent Conformal Violation: Does Inflation Like Fundamental Scalar Fields?
Speaker(s): Stephon Alexander
Abstract: We present a new model of inflation which does not rely on fundamental scalar fields.  The theory is a conformally invariant gauge field theory minimally coupled to massless fermions.  At the beginning of inflation, the conformal symmetry is dynamically broken by a BCS condensation... read more
Date: 11/05/2012 - 3:20 pm

Superconducting Dark Energy and Neutrino Oscillation
Speaker(s): Stephon Alexander
Abstract:
Date: 27/11/2009 - 11:00 am

Was Einstein Right Handed?
Speaker(s): Stephon Alexander
Abstract: Of all four forces only the weak interaction has experimentally exhibited parity violation. At the same time observations suggest that general relativity may require modification to account for dark matter and dark energy. Could it be that this modification involves gravitational parity violation? M... read more
Date: 25/11/2009 - 2:00 pm
Series: Colloquium

On Quantum Gravity and the Dark Energy Problem
Speaker(s): Stephon Alexander
Abstract: After reviewing the cosmological constant/dark energy problem(s), I will present a dynamical mechanism wheiren a gap forms turning the unstable perturbative gravitational vacuum into a non-perturbative vacuum. Similar to the BCS theory this mechanism reflects the formation of Cooper-pairs which can ... read more
Date: 25/07/2006 - 2:00 pm

Stephon's Group
Speaker(s): Stephon Alexander
Abstract: ISSYP 2004
Date: 27/08/2004 - 9:10 am
Collection: ISSYP 2004
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