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Theoretical Physics Articles
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Does spooky action at a distance allow faster than light communication?
Author: David Mcmahon
 Added: 03/21/2006
 Type: Summary
 Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10Average visitor rating of 7.9/10

Quantum entanglement, as first explained in the EPR paper written by Einstein and his colleagues, seems to imply that a "spooky" connection exists between particles that have interacted in the past. Does this connection allow us to communicate faster than the speed of light?
Why is Quantum Mechanics SO difficult?
Author: Guest Writer
 Added: 06/09/2005
 Type: Summary
 Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10

Strangely enough, QM's formalism isn't any more difficult than other areas of physics. The mathematics of the "standard" QM isn't any worse than, let's say, electromagnetism. Yet, to many people, especially non-physicists, QM presents a very daunting effort to understand.
Vacuum energy
Author: Guest Writer
 Added: 11/03/2004
 Type: Summary
 Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10

Quantum field theory considers the vacuum ground state not to be completely empty, but to consist of a seething mass of virtual particles and fields.
Energy Redshift Paradox
Author: Erich Schoedl
 Added: 11/13/2003
 Type: Summary
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Within the framework of General Relativity in one of its most simple forms, the Schwarzschild solution, a very interesting paradox can be proposed involving the conservation of work / energy. It’s a puzzle for the Relativity buff. In this short discussion I outline this energy redshift paradox, and the implications for an attempted solution.
An Introduction to Black Hole Thermodynamics
Author: Sridhar Narayanan
 Added: 10/28/2003
 Type: Tutorial
 Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10Average visitor rating of 8.8/10

Black Holes have always ben a controversial affair among Theoretical Astrophysicists. Especially, the Thermodynamics of a Black Hole. It was considered that the entropy of a Black Hole is infinitely large until Stephen Hawking proved that Black Holes are not really Black. They infact Radiate and evaporate... How is this so? What are the laws of Thermodynamics governing this process? Read on...
Understanding Quantum Tunneling
Author: Sridhar Narayanan
 Added: 10/21/2003
 Type: Tutorial
 Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10

Richard.P.Feynman once said "I think it would be safe for me to say that no one in this world understands Quantum Mechanics". Such an amazing theory Quantum Mechanics is, yet hard to understand. Quantum Tunneling has always been given in small portions of many text books and details have not been covered so as to aid better understanding of the Concept.In this article I have made an attempt to provide a better understanding of Tunneling. Go along read it...
Geometry in Space
Author: Sridhar Narayanan
 Added: 10/18/2003
 Type: Tutorial
 Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10Average visitor rating of 8.3/10

Geometry is how Nature displays itself to us. Geometry is the language of Nature. We have only been exposed to Geometry inside Earth. How beautiful is the Geometry of Outer Space...?
Quantum-Chromodynamics: A Definition
Author: Tab Stevens
 Added: 10/07/2003
 Type: Tip
 Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10Average visitor rating of 7.8/10

QCD describes the interactions between quarks in high energy physics. Here I will give you a few bits of information to spark your interest!
Introduction to Black Holes
Author: Tab Stevens
 Added: 05/29/2003
 Type: Summary
 Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10Average visitor rating of 7.5/10

As far back as the beginning man, people have looked to the heavens and wondered what is actually up there. Many have hypothesized, studied, and used various sorts of equipment to research the heavens...
Doubly Special Relativity, in Brief.
Author: FZ
Added: 04/28/2003
 Type: Summary
 Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10Average visitor rating of 8.4/10

An amazing basic beginner's guide to DSR, and how it differs from conventional relativity.
Unified Relativity
Author: Erich Schoedl
 Added: 04/14/2003
 Type: Summary
 Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10Average visitor rating of 7.4/10

Have you ever wondered why General Relativity breaks down at extremely small scales? Have you ever thought that maybe there is some simple connection with Quantum Mechanics that we’re missing? What I propose in this paper is my personal view on this missing link between the two powerful theories.
The Physics of Extra-Terrestrial Civilizations
Author: Michio Kaku
 Added: 03/05/2003
 Type: Summary
 Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10Average visitor rating of 9.6/10

The late Carl Sagan once asked this question, "What does it mean for a civilization to be a million years old? We have had radio telescopes and spaceships for a few decades; our technical civilization is a few hundred years old... an advanced civilization millions of years old is as much beyond us as we are beyond a bush baby or a macaque."
What Exactly Is Curved?
Author: Erich Schoedl
 Added: 02/09/2003
 Type: Tutorial
 Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10Average visitor rating of 8.6/10

This compilation of thought experiments attempts to describe the most basic mathematics of space-time curvature of General Relativity in a pictorial way. The material is intended for readers familiar with special relativity, but lost when trying to visualize Einstein's theory on curved space-time. This work is a continuation of the paper Distortions of Relativistic Measure, and gives a taste of the curvature in General Relativity.

The Paradox of Existence
Author: Guest Writer
 Added: 01/30/2003
 Type: Summary
 Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10Average visitor rating of 8.1/10

Existence is demonstrably paradoxical, that is, it does not make rational sense. Nature may make perfectly rational sense, but existence itself is clearly irrational and, thus, possibly supernatural...
Distortion of Relativistic Measures
Author: Contest Winner
 Added: 01/10/2003
 Type: Summary
 Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10Average visitor rating of 9.4/10

This article brings to light the variability of the observed length and rates of aging of relatively fast objects. This angle-of-observation dependent distortion is one of the most misunderstood consequences of Special Relativity. Some basics about relativity, including simple length contraction, are initially covered to set up the topic, with the help of two mischievous clocks and a smiley face...
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