D
DrRocket
Guest
<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>What is a scalar field? It says here something about being associated with zero spin particles and elsewhere is says "a scalar field associates a scalar value....to every point in space." So does that mean a particle was responsible for inflation? http://en.wikipedia.org/wiki/Scalar_field <br />Posted by kg</DIV></p><p>A scalar field is simply a function that assigned to each point in space-time a real number. One common example is eletric potential. The difference between the value of the electric potential at two points measures the difference in potential energy that would occur to a particle of unit charge moved from one point to the other. The gradient of that scalar field is vector which in this case is the E-field (electric field) of classical electrodynamics.</p><p>I don't know the details of the scalar field associated with inflation, but Guth postulated the existence of such a field with some specific properties and from that assumption was able to answer some open questions in cosmology, notably the horizon problem, the flatness problem and the apparent uniformity of the cosmic background radiation on a large scale and the small anisotropies seen on a small scale. http://en.wikipedia.org/wiki/Big_bang</p><p>There is book written by Guth for a general audience that might interest you. It is <em>The Inflationary Universe. </em>You can also look into inflation more deeply through Guth's web site and references to his papers, both technical and for a general audience. http://web.mit.edu/physics/facultyandstaff/faculty/alan_guth.html<br /></p> <div class="Discussion_UserSignature"> </div>