Ancient neutrinos could put string theory and quantum loop gravity to the test

October 13, 2005

Tiny but ageing neutrinos can be used to test the very foundations of quantum theory at unprecedented cosmological time scales

Must the Schrodinger's Cat be fat enough for us to detect the possible phenomenon of gravity-driven collapse of the wave-function? In the 1950s, Feynman suggested that the infamous Schrodinger's Cat paradox would be resolved if gravity can be implicated for the collapse of the wave-function.

But, from Feynman in the 1950s to Penrose today, physicists have always taken for granted that one has to look for quantum superpositions of sufficiently macroscopic objects to detect such an effect due to gravity, since only the large mass of such macroscopic objects could distort the very fabric of space-time in accordance with Einstein's theory of gravity, thereby inducing the quantum mechanical wave-function to collapse.

In this paper, however, we prove that the idea of Feynman and Penrose can be tested more decisively by observing the *skinniest* objects in the universe---namely, the tiny neutrinos---provided they have been born just after the Big Bang. In other words, we show that such tiny but ageing neutrinos can be used to test the very foundations of quantum theory at unprecedented cosmological time scales.

Complete paper located at: arxiv.org/abs/quant-ph/0503001

Find more about Schroedinger's Cat:
www.lassp.cornell.edu/ardlouis/dissipative/Schrcat.html
www.windows.ucar.edu/tour/link=/kids_space/scat.html&edu=high

Source: Perimeter Institute for Theoretical Physics

Explore further: How Einstein could help unlock the mysteries of space travel

Related Stories

Twin paradox on a chip

August 19, 2015

Per Delsing and his team want to combine theoretical calculations with experiments on superconducting circuits to gain an understanding of how things fit together at the nano level. Among other things, they plan to simulate ...

New blow for 'supersymmetry' physics theory

July 27, 2015

In a new blow for the futuristic "supersymmetry" theory of the universe's basic anatomy, experts reported fresh evidence Monday of subatomic activity consistent with the mainstream Standard Model of particle physics.

The ins and outs of quantum chromodynamics

July 7, 2015

Quarks and antiquarks are the teeny, tiny building blocks with which all matter is built, binding together to form protons and neutrons in a process explained by quantum chromodynamics (QCD).

Recommended for you

Interactive tool lifts veil on the cost of nuclear energy

August 24, 2015

Despite the ever-changing landscape of energy economics, subject to the influence of new technologies and geopolitics, a new tool promises to root discussions about the cost of nuclear energy in hard evidence rather than ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.