The main problems of canonical quantum cosmology are the following

The main problems of canonical quantum cosmology are the following: The singularity. The Wheeler-DeWitt equation does not remove the singularity, although in some cases the solutions avoid the singularity due to the effective potential as we have seen. In short, canonical quantum gravity is not well defined. The models of canonical quantum cosmology do only apply on a semiclassical approximation...

Cosmic Seeding

Most of the universe's heavy elements, including the iron central to life itself, formed early in cosmic history and spread throughout the universe, according to a new study of the Perseus Galaxy Cluster using Japan's Suzaku satellite. Suzaku study points to early cosmic 'seeding': http://phy.so/302434001 (Phys.org) —Most of the universe's heavy elements, including the iron central to life...

Graviton

I have been refreshing myself on quantum gravity, renormalization and the concept of gravitons being experimentally confirmed all morning. This is an interesting article I found on how physicist could find the highly theoretical particle called the graviton. They could use a particle accelerator to create a proton antiproton collision. This collision would result into gravitons decaying into standard...

Quantum Tunneling

Quantum Tunneling: A World Stranger Than Science Fiction Think for a moment about a ball rolling up a hill. If you don’t push hard enough, then it will not roll over the hill. This makes sense classically. However, in quantum mechanics, an object does not behave like a classical object (such as ball, or you, or I, or any matter in the universe...

Scientists reveal cosmic roadmap to galactic magnetic field

Scientists reveal cosmic roadmap to galactic magnetic field: http://phy.so/311514082 Scientists on NASA's Interstellar Boundary Explorer (IBEX) mission, including a team leader from the University of New Hampshire, report that recent, independent measurements have validated one of the mission's signature findings—a mysterious "ribbon" of energy and particles at the edge of our solar system...

Nuclear-atomic overlap for the isotope thorium-229

Nuclear-atomic overlap for the isotope thorium-229: http://phy.so/311851967 More than 99.9% of the mass of any atom is concentrated into a quadrillionth of its volume, the part occupied by the nucleus. Unimaginably small, dense and energetic, atomic nuclei are governed by laws quite distinct from those that regulate atomic electrons, which constitute the outer part of atoms and which are immediately...

Standard Model of Fundamental Particles and Interactions.

Standard Model of Fundamental Particles and Interactions. (But without the Higgs boson, most certainly because it wasn't discovered yet when this poster was created). Link to high res here: http://www.phy.duke.edu/research/NPTheory/particle_chart2.jp...

"The Basic Elements of String Theory"

"The Basic Elements of String Theory" Five key ideas are at the heart of string theory. Become familiar with these key elements of string theory right off the bat. Read on for the very basics of these five ideas of string theory in the sections below. 1.Strings and membranes- When the theory was originally developed in the 1970s, the filaments of energy in string theory were considered...

theoretical gravitation particle

There’s another theoretical gravitation particle, and it is quite intriguing. The graviphoton is a particle that would be created when the gravitational field is excited in a fifth dimension. It comes from the Kaluza Klein theory, which proposes that electromagnetism and gravitation can be unified into a single force under the condition that there are more than four dimensions in spacetime. A graviphoton...

The Successes of String Theory

The Successes of String Theory String theory has gone through many transformations since its origins in 1968 when it was hoped to be a model of certain types of particle collisions. It initially failed at that goal, but in the 40 years since, string theory has developed into the primary candidate for a theory of quantum gravity. It has driven major developments in mathematics, and theorists have...

3 parts series on supersymmetry

3 parts series on supersymmetry Nice reading for SUSY fans, check it out: part 1 http://www.quantumdiaries.org/2014/03/14/the-standard-model-a-beautiful-but-flawed-theory/ part 2 http://www.quantumdiaries.org/2014/03/19/supersymmetry-a-tantalising-theory/ part 3 http://www.quantumdiaries.org/2014/03/21/has-anybody-seen-my-supersymmetric-particles...

About the nature of time and time travel

About the nature of time and time travel Think about the nature of time at first! Time is related to motion and duration. There is no time as such, time in the concept that we are used to use it is not existent: clocks are not measuring time per se. Time is the highest form of energy represented by spin, charge and oscillation. There is NO preserved state of the past, future is a probability...

String Theory.................Particle Physics

(Phys.org) —Scientists at Towson University in Towson, Maryland, have identified a practical, yet overlooked, test of string theory based on the motions of planets, moons and asteroids, reminiscent of Galileo's famed test of gravity by dropping balls from the Tower of Pisa. String theory is infamous as an eloquent theoretical framework to understand all forces in the universe —- a so-called "theory...

New model shows light can be captured in a Bose-Einstein condensate state

New model shows light can be captured in a Bose-Einstein condensate state. This research was published in Physical Review A (http://journals.aps.org/pra/abstract/10.1103/PhysRevA.89.033862). If anybody wants to read the paper then here's the link: http://arxiv.org/abs/1401.0520 New State Of Light Offered Up By Physicist Overseas www.huffingtonpost.com A theoretical physicist has explained...

Does Light Experience Time?

Does Light Experience Time? http://buff.ly/Ro93La Does Light Experience Time? www.universetoday.com Have you ever noticed that time flies when you're having fun? Well, not for light. In fact, photons don't experience any time at all. Here's a mind-bending concept that should shatter your brain into.....

Quantum near-horizon geometry of a black 0-brane

Quantum near-horizon geometry of a black 0-brane (3 photos) Artist's rendering of the interior of a black hole as a collection of strings. http://legacy.kek.jp/intra-e/press/2008/BlackHole_e.htm...

Physicists are scratching their heads...

Physicists are scratching their heads... Neutron Death Mystery Stymies Physicists www.huffingtonpost.com Despite decades of taking measurements, scientists cannot agree on how long neutrons live. Neutrons are stable inside atoms, but on their own they decay in about... ...

visualizing complex electronic state

The new findings are reported this week in the journal Nature Materials, in a paper by MIT postdoc Xin Li, professors Young Lee and Gerbrand Ceder, also of MIT, and 12 others. Team visualizes complex electronic state newsoffice.mit.edu Multidisciplinary group solves mystery of how a potential battery electrode material behaves. ...

Observation of geometric scaling of Efimov states in a Fermi-Bose Li-Cs mixture

Observation of geometric scaling of Efimov states in a Fermi-Bose Li-Cs mixture Shih-Kuang Tung, Karina Jimenez-Garcia, Jacob Johansen, Colin V. Parker, Cheng Chin (Submitted on 24 Feb 2014) The emergence of scaling symmetry in physical phenomena suggests a universal description that is insensitive to microscopic details. A well known example is critical phenomena, which are invariant under...

Question

Gravity is the force that is constantly working to centralize quantum harmonic oscillators into the unified field. Black holes disappear once oscillators are centralized into the unified field by its gravity. What do you say...

Cosmic Inflation Is ‘Fantasy’

Sir Roger Penrose calls string theory a "fashion," quantum mechanics "faith," and cosmic inflation a "fantasy." Coming from an armchair theorist, these declarations might be dismissed. But Penrose is a well-respected physicist who co-authored a seminal paper on black holes with Stephen Hawking. What's wrong with modern physics—and could alternative theories explain our observations of the universe? Sir...

Neutron Decay

If neutrons were observed to decay via the emission of two beta particles (as opposed to one beta and one neutrino), it would constitute evidence of Majorana neutrinos - that is, neutrinos that are their own antiparticles. The Enriched Xenon Observatory-200 has not detected such decays, but it has placed more stringent lower limits on their likelihood. EXO-200 narrows its search for Majorana...

Alan Guth's Course

MIT's Alan Guth is one of the originators of the inflation theory of the early universe. He also teaches an introductory course on cosmology, which you can take for free, thanks to MIT's Open Courseware project. Click on the link to find lecture videos, slides, assignments and other online course materials. via- Physics Today http://ocw.mit.edu/courses/physics/8-286-the-early-universe-fall-2013/ The...

Quantum phase transitions

Quantum phase transitions take place at 0 K - that is, without the help of thermal fluctuations. A theory that describes how such transitions behave at higher temperatures has just been vindicated by Anne Kinross of McMaster University and her collaborators. Martin Klanjšek of the Jožef Stefan Institute in Ljubljana explains the experiment's significance. A Critical Test of Quantum Criticality physics.aps.org Theoretically...

EPR paradox

The EPR paradox (or Einstein–Podolsky–Rosen paradox) is a topic in quantum physics and the philosophy of science regarding measurements of microscopic systems (such as individual photons, electrons or atoms) and the description of those systems by the methods of quantum physics. It refers to a dichotomy, where either the measurement of a physical quantity in one system affects the measurement of...

If phonon have zero rest mass why don't it travel at the speed of light?

If phonon have zero rest mass why don't it travel at the speed of light? Special relativity says the massless particle always move at speed of light...

Scientists find a practical test for string theory

Scientists find a practical test for string theory: http://phy.so/308225369 (Phys.org) —Scientists at Towson University in Towson, Maryland, have identified a practical, yet overlooked, test of string theory based on the motions of planets, moons and asteroids, reminiscent of Galileo's famed test of gravity by dropping balls from the Tower of Pisa...

Could Particle 'Spooky Action' Define The Nature Of Gravity?

Could Particle 'Spooky Action' Define The Nature Of Gravity? Quantum physics is a fascinating yet complicated subject to understand, and one of the things that freaks out physics students every is the concept of entanglement. That occurs when physicists attempt to measure the state of a particle and that affects the state of another particle instantly. (In reality, the particles are in multiple...

Prof Michio Kaku on Science and Politics

Prof Michio Kaku on Science and Politics Scientists need to engage with the public and make statements about the great political issues of the day - because it impacts not just our science budget, but actually on our way of life. Video:http://www.sciencegymnasium.com/2013/07/michio-kaku-on-science-and-politics.html ...

How to Observe Schrodinger's Cat Without Killing it

How to Observe Schrodinger's Cat Without Killing it: Schrödinger’s cat is by far the best known example of demonstrating quantum superpositions. Now, scientists might be able to observe the cat without risking killing it. First, lets quickly recap Schrodinger’s cat. To quote from the NewScientist picture, “Erwin Schrödinger proposed that a cat in a closed, booby-trapped box...

I hope you guys love to see

I hope you guys love to see/read this http://www.lorentz.leidenuniv.nl/history/Einstein_archive/Einstein_1925_manuscript/index_1.htm...

MEASUREMENT OF THE GRAVITATIONAL MASS OF ANTIHYDROGEN

MEASUREMENT OF THE GRAVITATIONAL MASS OF ANTIHYDROGEN To oversimplify it, antimatter is the opposite of matter. The two are mirror images with opposite electric charges. But, do the two respond in opposite ways to gravity? Instead of falling down, would antimatter “fall up”? If antimatter does go up instead of down, it will cause scientists to reevaluate how the universe works. These questions...

leviton

Researchers produce the first experimental pulse-generation of a single electron—a leviton A team of researchers in France has produced the first experimental pulse-generation of a single electron—they've named it a leviton, in honor of physicist Leonid Levitov and its resemblance to a soliton. In their paper published in the journal Nature, the team describes how they caused the leviton to...

All About Neutrinos:

All About Neutrinos: What is this thing, anyways? Neutrinos are subatomic particles produced by the decay of radioactive elements and are elementary particles that lack an electric charge, or, as F. Reines would say, "...the most tiny quantity of reality ever imagined by a human being". "The name neutrino was coined by Enrico Fermi as a word play on neutrone, the Italian name of the neutron." Of...

Thermomagnetism: Using Heat to Make Magnets-

Thermomagnetism: Using Heat to Make Magnets- EPFL scientists have provided the first evidence ever that it is possible to generate a magnetic field by using heat instead of electricity. The phenomenon is referred to as the Magnetic Seebeck effect or ‘thermomagnetism’. A temperature difference across an electric conductor can generate an electric field. This phenomenon, called the Seebeck effect,...

Schwarzschild Black Hole :

Schwarzschild Black Hole : Few months after Einstein published his work on General Relativity (in 1915), Karl Schwarzschild (1916) found one solution to Einstein's equations : the curvature due to a massive non-rotating spherical object. Using Einstein's equation, Schwarzschild had determined how spacetime is curved due to the presence of a nonrotating spherical mass, assuming it is spherically...

The Lepton - By: Rabbit

The Lepton - By: Rabbit “Why The Name Lepton” Leptons: In 1897 the first lepton was discovered by J.J. Thomson and his team of British physicists. Physicists got the name “lepton” from the Greek language, meaning “slender”. It wasn’t until 1975 that Martin Lewis Perl and his colleagues at the SLAC LBL group discovered the tau through a series of experiments. Up until 1975, it was originally...

Klein Tunneling: Coupled Particles Cross Energy Wall:

Klein Tunneling: Coupled Particles Cross Energy Wall: Model demonstrates that it is possible for two particles to cross an energy barrier together, where a single particle could not...... For the first time, a new kind of so-called Klein tunnelling-representing the quantum equivalent of crossing an energy wall- has been presented in a model of two interacting particles. This work by Stefano...

Non-locality & Quantum Theory

Non-locality & Quantum Theory --------------------------------------- Locality means that an object is influenced directly only by its immediate surroundings and not by remotely located objects. The fact that quantum mechanics is at odds with this principle is not new. Back in the 1930s, Einstein, Podolsky, Rosen, and Schrödinger, first spotted this striking aspect of quantum theory as...

"Einstein's Special Relativity" for dummies

"Einstein's Special Relativity" By: Andrew Zimmerman Jones and Daniel Robbins from String Theory for Dummies Theory For Dummies In 1905, Albert Einstein published the theory of special relativity, which explains how to interpret motion between different inertial frames of reference — that is, places that are moving at constant speeds relative to each other. Einstein explained that when...