URL - StealthSkater
... extremal of Kähler action is enough (forgetting the delicacies caused by the failure of Classical determinism in standard sense for Kähler action allowing one to also realize the space-time correlates of quantum jump sequences). 2. Nima uses blackhole-based arguments to demonstrate that local observ ...
... extremal of Kähler action is enough (forgetting the delicacies caused by the failure of Classical determinism in standard sense for Kähler action allowing one to also realize the space-time correlates of quantum jump sequences). 2. Nima uses blackhole-based arguments to demonstrate that local observ ...
N =1
... The theory is supersymmetric but its ground state is not. (This nonzero vacuum energy should not be confused with the cosmological constant. The latter can be adjusted to its desired value.) ...
... The theory is supersymmetric but its ground state is not. (This nonzero vacuum energy should not be confused with the cosmological constant. The latter can be adjusted to its desired value.) ...
Supersymmetry: what? why? when?
... only if all quarks and leptons and gauge bosons have zero mass. This result follows from the symmetries of the Standard Model. The SU(2) symmetry says the theory is invariant under interchanges of whatever particles are placed in SU(2) representations, for example the electron and the electron neutr ...
... only if all quarks and leptons and gauge bosons have zero mass. This result follows from the symmetries of the Standard Model. The SU(2) symmetry says the theory is invariant under interchanges of whatever particles are placed in SU(2) representations, for example the electron and the electron neutr ...
Julian Schwinger (1918-1994)
... representation to describe the scattering of spin-1/2 Dirac particles, electronelectron scattering or Møller scattering. This paper he wrote entirely on his own, but showed it to no one, nor did he submit it to a journal. It was ‘a little practice in writing,’ but it was a sign of great things to c ...
... representation to describe the scattering of spin-1/2 Dirac particles, electronelectron scattering or Møller scattering. This paper he wrote entirely on his own, but showed it to no one, nor did he submit it to a journal. It was ‘a little practice in writing,’ but it was a sign of great things to c ...
PERIMETER INSTITUTE L`INSTITUT PERIMETER
... Christopher Fuchs also gives his perspective on a fresh approach to unraveling the conundrums of quantum mechanics with the help of Bayesian probability theory. Quantum information science emerged as an offshoot of quantum foundations, and now flourishes with the promise of new technologies which ma ...
... Christopher Fuchs also gives his perspective on a fresh approach to unraveling the conundrums of quantum mechanics with the help of Bayesian probability theory. Quantum information science emerged as an offshoot of quantum foundations, and now flourishes with the promise of new technologies which ma ...
institute of theoretical physics - Faculty of Physics University of Warsaw
... It is otherwise with specialized and monographic lectures on various topics in theoretical and mathematical physics for graduate and postgraduate students. These are delivered by specialists in that domain and assigned to particular Divisions. Only some of these lectures are in English, but we presu ...
... It is otherwise with specialized and monographic lectures on various topics in theoretical and mathematical physics for graduate and postgraduate students. These are delivered by specialists in that domain and assigned to particular Divisions. Only some of these lectures are in English, but we presu ...
Family Gauge Theory
... “For the coordinates we can find the conjugate momenta such that the basic (elementary) commutation relations hold.” – except that quantities take continuum meaning and we also generalize the notion to include fermions (I.e. anti-commutation relations). ...
... “For the coordinates we can find the conjugate momenta such that the basic (elementary) commutation relations hold.” – except that quantities take continuum meaning and we also generalize the notion to include fermions (I.e. anti-commutation relations). ...
A review of E infinity theory and the mass spectrum of high energy
... Having mentioned string theory, we should mention that in string theory particles are perceived as highly localised vibration of Planck length strings, so that strictly speaking, within string theory there is no essential difference between a resonance particle and say a meson or an electron. The nic ...
... Having mentioned string theory, we should mention that in string theory particles are perceived as highly localised vibration of Planck length strings, so that strictly speaking, within string theory there is no essential difference between a resonance particle and say a meson or an electron. The nic ...
Department of Physics MSc Handbook 2012/13 www.kcl.ac.uk/physics
... Appleton Layer. Again, and quite coincidentally, he was carrying out fundamental physics with very strong applications to communications. The most recent Nobel prize winner associated with the Physics Department is Professor Maurice Wilkins FRS (1916-2004), who shared the 1962 Nobel Prize for Physio ...
... Appleton Layer. Again, and quite coincidentally, he was carrying out fundamental physics with very strong applications to communications. The most recent Nobel prize winner associated with the Physics Department is Professor Maurice Wilkins FRS (1916-2004), who shared the 1962 Nobel Prize for Physio ...
The Facets of Relativistic Quantum Field Theory1
... and a spontaneous decay cannot be described consistently; all states, also the ...
... and a spontaneous decay cannot be described consistently; all states, also the ...
Do we need the Concept of Particle?
... part of the measurement device. One must only note that the wavemechanical model has no ambition other than providing a method to calculate the probabilities which are needed at the end of the process. It does not offer a description of the intermediate events between the preparation of an experimen ...
... part of the measurement device. One must only note that the wavemechanical model has no ambition other than providing a method to calculate the probabilities which are needed at the end of the process. It does not offer a description of the intermediate events between the preparation of an experimen ...
Quantum gravity
Quantum gravity (QG) is a field of theoretical physics that seeks to describe the force of gravity according to the principles of quantum mechanics.The current understanding of gravity is based on Albert Einstein's general theory of relativity, which is formulated within the framework of classical physics. On the other hand, the nongravitational forces are described within the framework of quantum mechanics, a radically different formalism for describing physical phenomena based on probability. The necessity of a quantum mechanical description of gravity follows from the fact that one cannot consistently couple a classical system to a quantum one.Although a quantum theory of gravity is needed in order to reconcile general relativity with the principles of quantum mechanics, difficulties arise when one attempts to apply the usual prescriptions of quantum field theory to the force of gravity. From a technical point of view, the problem is that the theory one gets in this way is not renormalizable and therefore cannot be used to make meaningful physical predictions. As a result, theorists have taken up more radical approaches to the problem of quantum gravity, the most popular approaches being string theory and loop quantum gravity. A recent development is the theory of causal fermion systems which gives quantum mechanics, general relativity, and quantum field theory as limiting cases.Strictly speaking, the aim of quantum gravity is only to describe the quantum behavior of the gravitational field and should not be confused with the objective of unifying all fundamental interactions into a single mathematical framework. While any substantial improvement into the present understanding of gravity would aid further work towards unification, study of quantum gravity is a field in it's own right with various branches having different approaches to unification. Although some quantum gravity theories, such as string theory, try to unify gravity with the other fundamental forces, others, such as loop quantum gravity, make no such attempt; instead, they make an effort to quantize the gravitational field while it is kept separate from the other forces. A theory of quantum gravity that is also a grand unification of all known interactions is sometimes referred to as a theory of everything (TOE).One of the difficulties of quantum gravity is that quantum gravitational effects are only expected to become apparent near the Planck scale, a scale far smaller in distance (equivalently, far larger in energy) than what is currently accessible at high energy particle accelerators. As a result, quantum gravity is a mainly theoretical enterprise, although there are speculations about how quantum gravity effects might be observed in existing experiments.