Recent content by marcus

http://arxiv.org/abs/1604.02375 Improved regularization from Quantum Reduced Loop Gravity Emanuele Alesci, Francesco Cianfrani (Submitted on 8 Apr 2016) The choice of the regularization scheme in Loop Quantum Cosmology (LQC) is crucial for the predicted phenomenology. We outline how the improved...

atyy, I hope you take over maintaining this bibliography as I become less able to. thank you, and best wishes, Marcus (partly age-related partly medical problems, I won't specify, more having to do with energy and coordination than strictly cognitive.)

==Rayman== April 8 - Dawn to Execute Small Maneuver This Weekend Dawn is continuing to observe Ceres. Tomorrow it will begin the second half of the orbit maintenance maneuver it performed on April 1 and 2. It will thrust with ion engine #2 for almost two hours starting about 3:30 PM and then...

==Rayman== April 5 - Dawn Healthy and Operating Well Since thrusting with its ion engine on April 1 and 2 to refine its orbit around Ceres, Dawn has been collecting more data on the dwarf planet. It is taking pictures, measuring the gravity field, and collecting infrared, gamma ray and neutron...

http://arxiv.org/abs/1604.00847 A new algebraic structure in the standard model of particle physics Latham Boyle, Shane Farnsworth (Submitted on 4 Apr 2016) We introduce a new formulation of non-commutative geometry (NCG): we explain its mathematical advantages and its success in capturing the...

thanks! So it's a Jan 2008 lecture series. The formulation has changed some since, which could matter. There is EPRL and variations like Jon Engle's. I don't know if it would make a difference to you but you might be interested in looking at some of the more recent papers I linked to. e.g. in...

Nice comment. As a convenience to us, if not too much of a nuisance, would you give a link to the lecture video? Or the slides pdf, if available?

Also a bit of news about GRaND: === http://dawnblog.jpl.nasa.gov/2016/03/31/dawn-journal-march-31-3/ === We saw that extensive measurements of the faint nuclear radiation can help identify the atomic constituents. While the analysis of the data is complicated, and much more needs to be done, a...

===Rayman=== April 1 - Dawn to Adjust Orbit At the end of another productive week, Dawn is transmitting its most recent scientific data to the Deep Space Network . The March Dawn Journal presents some of the mission's latest findings about Ceres. The spacecraft will start executing an orbit...

reminder for the next poll (just missed including it in this one): http://arxiv.org/abs/1603.09671 The Vertex Expansion in the Consistent Histories Formulation of Spin Foam Loop Quantum Cosmology David Craig, Parampreet Singh (Submitted on 31 Mar 2016) Assignment of consistent quantum...

Image 56 is of a "sinuous canyon". It looks deep cut and meandering. What could have made this? http://dawn.jpl.nasa.gov/multimedia/images/image-detail.html?id=PIA20551

a successful qg theory may need to correctly predict the observed value of the cosmological constant (i.e. longterm expansion rate) this may arise from the quantum microstructure underlying geometry. so here is one qg theory that makes a prediction http://arxiv.org/abs/1603.08658 The Atoms Of...

there was a paper about this on the fourth quarter MIP poll https://www.physicsforums.com/threads/poll-fourth-quarter-2015-mip-most-important-qg-papers.851080/ here it is: http://arxiv.org/abs/1512.02083 Tests of Quantum Gravity induced non-locality via opto-mechanical quantum oscillators...

You might be interested in a series of work by Jonathan Engle. Here is the most recent. http://arxiv.org/abs/1603.01128 He is one of the original EPRL authors (EPRL formulation became covariant Lqg) and he has given careful attention to this issue "how related to diffeo invariance..." Here...

http://arxiv.org/abs/1603.08658 The Atoms Of Space, Gravity and the Cosmological Constant T. Padmanabhan (Submitted on 29 Mar 2016) I describe an approach which connects classical gravity with the quantum microstructure of spacetime. The field equations arise from maximizing the density of...