Search FQXi

If you are aware of an interesting new academic paper (that has been published in a peer-reviewed journal or has appeared on the arXiv), a conference talk (at an official professional scientific meeting), an external blog post (by a professional scientist) or a news item (in the mainstream news media), which you think might make an interesting topic for an FQXi blog post, then please contact us at with a link to the original source and a sentence about why you think that the work is worthy of discussion. Please note that we receive many such suggestions and while we endeavour to respond to them, we may not be able to reply to all suggestions.

Please also note that we do not accept unsolicited posts and we cannot review, or open new threads for, unsolicited articles or papers. Requests to review or post such materials will not be answered. If you have your own novel physics theory or model, which you would like to post for further discussion among then FQXi community, then please add them directly to the "Alternative Models of Reality" thread, or to the "Alternative Models of Cosmology" thread. Thank you.

Contests Home

Previous Contests

Wandering Towards a Goal
How can mindless mathematical laws give rise to aims and intention?
December 2, 2016 to March 3, 2017
Contest Partner: The Peter and Patricia Gruber Fnd.

Trick or Truth: The Mysterious Connection Between Physics and Mathematics
Contest Partners: Nanotronics Imaging, The Peter and Patricia Gruber Foundation, and The John Templeton Foundation
Media Partner: Scientific American


How Should Humanity Steer the Future?
January 9, 2014 - August 31, 2014
Contest Partners: Jaan Tallinn, The Peter and Patricia Gruber Foundation, The John Templeton Foundation, and Scientific American

It From Bit or Bit From It
March 25 - June 28, 2013
Contest Partners: The Gruber Foundation, J. Templeton Foundation, and Scientific American

Questioning the Foundations
Which of Our Basic Physical Assumptions Are Wrong?
May 24 - August 31, 2012
Contest Partners: The Peter and Patricia Gruber Foundation, SubMeta, and Scientific American

Is Reality Digital or Analog?
November 2010 - February 2011
Contest Partners: The Peter and Patricia Gruber Foundation and Scientific American

What's Ultimately Possible in Physics?
May - October 2009
Contest Partners: Astrid and Bruce McWilliams

The Nature of Time
August - December 2008

Forum Home
Terms of Use

Order posts by:
 chronological order
 most recent first

Posts by the author are highlighted in orange; posts by FQXi Members are highlighted in blue.

By using the FQXi Forum, you acknowledge reading and agree to abide by the Terms of Use

 RSS feed | RSS help

Narendra Nath: on 12/6/08 at 16:02pm UTC, wrote Dear Dr. Parikh. It is a pleasant reading your essay. it appears you have...

Carl Brannen: on 12/2/08 at 22:20pm UTC, wrote Interesting and thought provoking essay. The thing about analyzing energy...

Maulik Parikh: on 12/2/08 at 14:36pm UTC, wrote Essay Abstract The future differs from the past: it has more...


kurt stocklmeir: "em drive metamaterials at 1 end that create negative radiation pressure -..." in Alternative Models of...

jiya joseph: "I guess a workshop is conducted by the people that are favorable for the..." in Schrödinger’s Cat...

mono joli: "thanks a lot for such a great topic. Scary Maze Games Basketball Legends..." in The Race to Replace the...

Joe Fisher: "Dear Dr. Brendan Foster, Of course: “We Are All Connected .” My..." in We Are All Connected

Caroline v: "Thanks for informing us about FQXi-sponsored workshop which aim was to..." in Schrödinger’s Cat...

Yelena Hopper: "Training is the way toward encouraging learning, or the procurement of..." in Wandering Towards a Goal:...

Yelena Hopper: "This article is such a pleasant and intriguing one, I'm exceptionally happy..." in We Are All Connected

Yelena Hopper: "Pushing the points of confinement of hypothesis and creative energy in..." in Review of “A Big Bang...

click titles to read articles

Our Place in the Multiverse
Calculating the odds that intelligent observers arise in parallel universes—and working out what they might see.

Sounding the Drums to Listen for Gravity’s Effect on Quantum Phenomena
A bench-top experiment could test the notion that gravity breaks delicate quantum superpositions.

Watching the Observers
Accounting for quantum fuzziness could help us measure space and time—and the cosmos—more accurately.

Bohemian Reality: Searching for a Quantum Connection to Consciousness
Is there are sweet spot where artificial intelligence systems could have the maximum amount of consciousness while retaining powerful quantum properties?

Quantum Replicants: Should future androids dream of quantum sheep?
To build the ultimate artificial mimics of real life systems, we may need to use quantum memory.

October 18, 2017

CATEGORY: The Nature of Time Essay Contest (2008) [back]
TOPIC: Weakening Gravity's Grip on the Arrow of Time by Maulik Parikh [refresh]
Bookmark and Share
Login or create account to post reply or comment.

Maulik Parikh wrote on Dec. 2, 2008 @ 14:36 GMT
Essay Abstract

The future differs from the past: it has more entropy. No theoretical framework including inflation has yet provided a dynamical origin for this elementary fact, the thermodynamic arrow of time. I argue that by weakening the strength or range of gravity at early times, one can find a natural way to obtain the smooth conditions present in the early universe.

Author Bio

Maulik Parikh is a theoretical high-energy physicist. He did his bachelor's at the University of California at Berkeley followed by a PhD in physics from Princeton University. After post-doctoral stints at the University of Utrecht in the Netherlands and at Columbia University, he is now faculty at the Inter-University Centre for Astronomy and Astrophysics (IUCAA) in India. In 2004 he won the Gravity Research Foundation essay competition for a paper he wrote on black holes.

Download Essay PDF File

Carl Brannen wrote on Dec. 2, 2008 @ 22:20 GMT
Interesting and thought provoking essay.

The thing about analyzing energy in the context of the Big Bang is that energy is due to the symmetry of physics with respect to time (by Noether's theorem). But the Big Bang indicates a lack of symmetry in something, so maybe energy, or gravity, was not conserved.

Narendra Nath wrote on Dec. 6, 2008 @ 16:02 GMT
Dear Dr. Parikh.

It is a pleasant reading your essay. it appears you have examined the problem in a chronological way. You demand the weakening of gravity to start with. It may either be in strength or in range. The later means that there is a saturation aspect attached to it. In this context, it is interesting to examine the initial very short lived inflation of the Universe. Its explanation may well include repulsive nature of gravity at short range that becomes attractive otherwise. This is similar to what has been accepted to be true for the strong nuclear force.

In my essay here, i have tried to provide some perspectives for the early universe. Being a novice in the field, i could contemplate in a more or less unbaised manner, so i feel! can you provide some comments, in spite of your late arrival in this contest?

Login or create account to post reply or comment.

Please enter your e-mail address:
Note: Joining the FQXi mailing list does not give you a login account or constitute membership in the organization.