Nino Zanghì Dipartimento di Fisica dell`Università di Genova, INFN
... “The concept of 'observable' lends itself to very precise mathematics when identified with 'selfadjoint operator'. But physically, it is a rather wooly concept. It is not easy to identify precisely which physical processes are to be given status of 'observations' and which are to be relegated to th ...
... “The concept of 'observable' lends itself to very precise mathematics when identified with 'selfadjoint operator'. But physically, it is a rather wooly concept. It is not easy to identify precisely which physical processes are to be given status of 'observations' and which are to be relegated to th ...
From wave functions to quantum fields
... energy and a negative density probability of the Klein-Gordon equation. It was 6 years before the correct interpretation of the Klein-Gordon equation. Even if it was not his initial goal, Dirac found that his equation was able to describe particles and antiparticles with half spin unit. Starting fro ...
... energy and a negative density probability of the Klein-Gordon equation. It was 6 years before the correct interpretation of the Klein-Gordon equation. Even if it was not his initial goal, Dirac found that his equation was able to describe particles and antiparticles with half spin unit. Starting fro ...
PPT
... than historically. In particular, experimental results from the 1980 on will be introduced fairly early, rather than allowing the sort of amorphous ideas about interpretation that prevailed from about 1930 until then. • Before we discuss the many interpretations of "measurement", which range from th ...
... than historically. In particular, experimental results from the 1980 on will be introduced fairly early, rather than allowing the sort of amorphous ideas about interpretation that prevailed from about 1930 until then. • Before we discuss the many interpretations of "measurement", which range from th ...
Production Mechanism of Quark Gluon Plasma in Heavy Ion
... After the two nuclei collide, and start receding from each other, color strings are formed between them. These strings merge to form ‘color rope’ (i.e. CEF is formed). Consequently the production process reduces to the instability of the QCD vacuum in the presence of a classical CEF which is in gene ...
... After the two nuclei collide, and start receding from each other, color strings are formed between them. These strings merge to form ‘color rope’ (i.e. CEF is formed). Consequently the production process reduces to the instability of the QCD vacuum in the presence of a classical CEF which is in gene ...
8. Quantum field theory on the lattice
... Time evolution operator is U (t) = e−iĤt Feynman showed that the quantum theory defined by Ĥ and the Hilbert space is equivalent to the path integral (1). We shall now do this in imaginary time. Let us now consider the quantum system in imaginary time: t → τ = it , ...
... Time evolution operator is U (t) = e−iĤt Feynman showed that the quantum theory defined by Ĥ and the Hilbert space is equivalent to the path integral (1). We shall now do this in imaginary time. Let us now consider the quantum system in imaginary time: t → τ = it , ...
PROBset3_2015 - University of Toronto, Particle Physics and
... additional quantum number, as well as spin, electric charge, and mass? Think about the spin-statistics of spin 12 . What is that quantum number? If you can’t figure this out, it is a well know argument, you’ll find it by Googling (b) Assign the lepton generation (this is the same as lepton flav ...
... additional quantum number, as well as spin, electric charge, and mass? Think about the spin-statistics of spin 12 . What is that quantum number? If you can’t figure this out, it is a well know argument, you’ll find it by Googling (b) Assign the lepton generation (this is the same as lepton flav ...
Greco1 - INFN - Torino Personal pages
... For any operator one can define the Weyl transform of any operator: ...
... For any operator one can define the Weyl transform of any operator: ...
A Fresh View for Maxwell`s Equations and Electromagnetic Wave
... where ω is the angular frequency of the oscillation, k = 2π λ and λ is the wavelength. In this solution of the wave equation (or these types of equations) the constant of integration is always neglected or considered as 0 and the wave propagation is explained perfectly. However, if constants of inte ...
... where ω is the angular frequency of the oscillation, k = 2π λ and λ is the wavelength. In this solution of the wave equation (or these types of equations) the constant of integration is always neglected or considered as 0 and the wave propagation is explained perfectly. However, if constants of inte ...
Some beautiful equations of mathematical physics
... It is here that the principle of gauge invariance comes to the rescue, with important consequences both for the linear wave equations of free field theory and the nonlinear equations which describe interactions. Gauge invariance is the idea that part of the information contained in the field Aµ is u ...
... It is here that the principle of gauge invariance comes to the rescue, with important consequences both for the linear wave equations of free field theory and the nonlinear equations which describe interactions. Gauge invariance is the idea that part of the information contained in the field Aµ is u ...
We live in the quantum 4-dimensional Minkowski space-time
... so-called ”non-commutative geometry”. This phenomenon, if it exists, which we call it the ”super-quantum regime” – it is rather natural in the line of ”reasoning”. This noncommutative aspect among the coordinates was raised by Hartland S. Snyder in as early as 1947 [Phys. Rev. 71, 38 (1947)] [2]. Th ...
... so-called ”non-commutative geometry”. This phenomenon, if it exists, which we call it the ”super-quantum regime” – it is rather natural in the line of ”reasoning”. This noncommutative aspect among the coordinates was raised by Hartland S. Snyder in as early as 1947 [Phys. Rev. 71, 38 (1947)] [2]. Th ...
The 1/N expansion method in quantum field theory
... a well defined fixed value in each physical problem, N = 2, 3, . . . , etc. It is however tempting to consider the case where N is a free parameter which can be varied at will. In particular, large values of N , with the limit N → ∞, seem to be of interest. At first sight, it might seem that taking ...
... a well defined fixed value in each physical problem, N = 2, 3, . . . , etc. It is however tempting to consider the case where N is a free parameter which can be varied at will. In particular, large values of N , with the limit N → ∞, seem to be of interest. At first sight, it might seem that taking ...
Quantum Field Theory - damtp
... At distances shorter than this, there is a high probability that we will detect particleanti-particle pairs swarming around the original particle that we put in. The distance λ is called the Compton wavelength. It is always smaller than the de Broglie wavelength λdB = h/|~p|. If you like, the de Br ...
... At distances shorter than this, there is a high probability that we will detect particleanti-particle pairs swarming around the original particle that we put in. The distance λ is called the Compton wavelength. It is always smaller than the de Broglie wavelength λdB = h/|~p|. If you like, the de Br ...
264-0-0-0-0-Chihwei Yeh- CfP SiP 2017
... Innovation Studies, the University of Edinburgh TitleTalking to particle physicists AbstractFrom Frank Close, John Ellis to Brian Cox, particle physicists have been talking a lot to the so-labelled ‘general public’. In outreach and public engagement activities, they are normally alone on the stage, ...
... Innovation Studies, the University of Edinburgh TitleTalking to particle physicists AbstractFrom Frank Close, John Ellis to Brian Cox, particle physicists have been talking a lot to the so-labelled ‘general public’. In outreach and public engagement activities, they are normally alone on the stage, ...
