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Quantum spin systems from the perspective of quantum information
Quantum spin systems from the perspective of quantum information

What Are Quantum States? S. Malin Dept. of Physics and Astronomy
What Are Quantum States? S. Malin Dept. of Physics and Astronomy

Full Text PDF - Science and Education Publishing
Full Text PDF - Science and Education Publishing

... preferential direction; the precession is characterized by the precession phase, angle of deflection, and precession frequency; b) spin correlations may take place between the spins of pairs of virtual particles. The 2nd concept. In the physical vacuum there may exist quantum harmonic oscillators po ...
+ T - Purdue Physics
+ T - Purdue Physics

... – An arrow starting at the initial position (the tip of the initial position vector) and ending with the arrowhead at the final position (the tip of the final position vector) – The path of an object does not matter. The displacement ...
Chapter 6 - Notes
Chapter 6 - Notes

Conductance of a quantum wire in the Wigner crystal regime
Conductance of a quantum wire in the Wigner crystal regime

... the Hamiltonians (2) and (3) coincide in the leads, where Kρ = Kσ = 1 and g1⊥ = 0. Therefore one can complete the evaluation of Rσ by repeating the above calculation of Rρ , and we conclude that Rσ = h/2e2 . The conductance of the wire (Rρ + Rσ )−1 reduces to e2 /h. It is worth mentioning that the s ...
Optomechanics
Optomechanics

... l  What is the frequency response of the output field (i.e. the output optical susceptibility)? l  How significant are the fluctuations entering the output field through loss and the mechanical oscillator?, and, can they be suppressed with sufficiently high cooperativity (C)? ...
A. Momentum Conservation in Collisions
A. Momentum Conservation in Collisions

...  Momentum is a vector quantity that has the same direction as the velocity II. Momentum and its relationship to force  A net Force is required to change momentum in magnitude AND/OR direction! A change in momentum takes force and time. If one chooses to provide a really large MAXIMUM change in mom ...
Exploring dynamical phase transitions and prethermalization with
Exploring dynamical phase transitions and prethermalization with

... Dynamical phase transitions can occur in isolated quantum systems that are brought out of equilibrium by sudden parameter changes. We discuss the characterization of such dynamical phase transitions based on the statistics of produced excitations. We consider both the O(N ) model in the large-N limi ...
Superfluid Helium 3: Link between Condensed Matter Physics and
Superfluid Helium 3: Link between Condensed Matter Physics and

... the context of superfluid 3 He, this notion was taken up again by Leggett7,8 , who argued that tightly bound BoseEinstein-condensed molecules on the one hand and Cooper pairs on the other may be viewed as extreme limits of the same phenomenon. This approach, which was quite provocative at the time, ...
LHCC - uniud.it
LHCC - uniud.it

Constructor theory of information - Proceedings of the Royal Society A
Constructor theory of information - Proceedings of the Royal Society A

... are concerned with the fundamental issues that remain even in the limiting case when all error rates have been reduced to their physically possible minima, and there is no redundancy in the message being transmitted. In that limit, receiving the message means distinguishing it with perfect reliabili ...
In order to integrate general relativity with quantum theory, we
In order to integrate general relativity with quantum theory, we

... The twentieth century began with multiple revolutions in our previous view of the universe which was seen obeying the equations of Newton and Maxwell for point masses, charges, and electromagnetic fields. An understanding of the nature of the fundamental forces and their origin, along with the obser ...
Quantum Mechanics- wave function
Quantum Mechanics- wave function

Here
Here

hewett
hewett

... killed by LEP killed by h2 killed by b→s killed by g-2 killed by Higgs killed by g-2 killed by b→s killed by h2 killed by h2 ...
NUFACT11-Blondel-goals-of-the-workshop
NUFACT11-Blondel-goals-of-the-workshop

... (i.e. eliminate high gamma beta beams from the plots) 1’. Express sensitivities in term of error on parameters ...
The Electron and the Holographic Mass Solution
The Electron and the Holographic Mass Solution

... This solution, as well as being significantly accurate, gives us insight into the physical and mechanical dynamics of the granular Planck scale vacuum structure of spacetime and its role in the source of angular momentum, mass and charge. The definition clearly demonstrates that the differential an ...
Inequivalence of pure state ensembles for open quantum systems
Inequivalence of pure state ensembles for open quantum systems

... Clearly, once the system has reached steady-state then such a stationary ensemble will represent the system for all times t. Now, if the ignorance interpretation were to hold for such an ensemble then it should be possible, in principle, for the experimenter to know which state Π̂k pertains to the s ...
On some log-cosine integrals related to (3), (4), and (6)
On some log-cosine integrals related to (3), (4), and (6)

Stochastic Models in Classical and Quantum Mechanics∗
Stochastic Models in Classical and Quantum Mechanics∗

... the dye disperses throughout the liquid. If one were to show the volume between the cylinders to a thermodynamicist, he or she would say that the dye is completely disordered... Reversal of the rotation of the inner cylinder reverses the mixing process; after an equal number of reverse rotations the ...
On the Utility of Entanglement in Quantum Neural Computing
On the Utility of Entanglement in Quantum Neural Computing

... Operators on a Hilbert space describe how one wave function is changed into another. Here they will be denoted by a capital letter with a hat, such as A, and they may be represented as matrices acting on vectors. Using operators, an eigenvalue equation can be written A 4;) = a i l & ) , where aiis t ...
A classical path to unification - Max-Planck
A classical path to unification - Max-Planck

... which two photons rather than particles are emitted from a common initial state. We assume that in the classical theory, the electromagnetic far fields of particles correspond (as in the case of the metron model) to the standard electromagnetic fields of classical point-like particles. The requireme ...
Metal Insulator Transition
Metal Insulator Transition

Light-like -deformations and scalar field theory via Drinfeld twist
Light-like -deformations and scalar field theory via Drinfeld twist

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Renormalization group



In theoretical physics, the renormalization group (RG) refers to a mathematical apparatus that allows systematic investigation of the changes of a physical system as viewed at different distance scales. In particle physics, it reflects the changes in the underlying force laws (codified in a quantum field theory) as the energy scale at which physical processes occur varies, energy/momentum and resolution distance scales being effectively conjugate under the uncertainty principle (cf. Compton wavelength).A change in scale is called a ""scale transformation"". The renormalization group is intimately related to ""scale invariance"" and ""conformal invariance"", symmetries in which a system appears the same at all scales (so-called self-similarity). (However, note that scale transformations are included in conformal transformations, in general: the latter including additional symmetry generators associated with special conformal transformations.)As the scale varies, it is as if one is changing the magnifying power of a notional microscope viewing the system. In so-called renormalizable theories, the system at one scale will generally be seen to consist of self-similar copies of itself when viewed at a smaller scale, with different parameters describing the components of the system. The components, or fundamental variables, may relate to atoms, elementary particles, atomic spins, etc. The parameters of the theory typically describe the interactions of the components. These may be variable ""couplings"" which measure the strength of various forces, or mass parameters themselves. The components themselves may appear to be composed of more of the self-same components as one goes to shorter distances.For example, in quantum electrodynamics (QED), an electron appears to be composed of electrons, positrons (anti-electrons) and photons, as one views it at higher resolution, at very short distances. The electron at such short distances has a slightly different electric charge than does the ""dressed electron"" seen at large distances, and this change, or ""running,"" in the value of the electric charge is determined by the renormalization group equation.
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