
weird
... •The calculations are harder, but the results are similar when you use photons •And we are very good at manipulating light! •Ordinary mirrors reflect light with nearly 100% effectiveness •If you make the reflecting layer thin enough, you can get it to reflect only half the light mirror half-mirror ...
... •The calculations are harder, but the results are similar when you use photons •And we are very good at manipulating light! •Ordinary mirrors reflect light with nearly 100% effectiveness •If you make the reflecting layer thin enough, you can get it to reflect only half the light mirror half-mirror ...
4.3 Ferromagnetism The Mean Field Approach 4.3.1 Mean Field Theory of Ferromagnetism
... because it is supposed to contain everything that acts locally, including the modifications we ought to make to account for effects as in the case of electrical fields. But since our fictitious "Weiss field" is so much larger than everything coming from real fields, we simply can forget about that. ...
... because it is supposed to contain everything that acts locally, including the modifications we ought to make to account for effects as in the case of electrical fields. But since our fictitious "Weiss field" is so much larger than everything coming from real fields, we simply can forget about that. ...
Primer on topological insulators
... [0, 2π/a] → R, k 7→ k,n as smooth functions, indexed by n. These function are known as (energy) bands, and the entity of all bands defines the band structure of the solid. The spectrum of the Hamiltonians Ĥk is unbounded from above, i.e. one might suspect that there is an infinity of bands. This, ...
... [0, 2π/a] → R, k 7→ k,n as smooth functions, indexed by n. These function are known as (energy) bands, and the entity of all bands defines the band structure of the solid. The spectrum of the Hamiltonians Ĥk is unbounded from above, i.e. one might suspect that there is an infinity of bands. This, ...
4.3 Ferromagnetism The Mean Field Approach 4.3.1 Mean Field Theory of Ferromagnetism
... For H = 0 we have two solutions (or none at all, if the straight line is too steep): One for J = 0 and one for a rather large J. It can be shown that the solution for J = 0 is unstable (it disappears for an arbitrarily small field H) so we are left with a spontaneous large magnetic polarization with ...
... For H = 0 we have two solutions (or none at all, if the straight line is too steep): One for J = 0 and one for a rather large J. It can be shown that the solution for J = 0 is unstable (it disappears for an arbitrarily small field H) so we are left with a spontaneous large magnetic polarization with ...
Modern Physics 342
... The notation for the quantum state of an electron is now described by the four quantum numbers n, l, ml and ms . For example, the ground state of the hydrogen is labeled as (n,l,ml,ms )=(1,0,0,±½) which means the are two quantum states that can be occupied by the electron; (1,0,0,+½) or (1,0,0,-½). ...
... The notation for the quantum state of an electron is now described by the four quantum numbers n, l, ml and ms . For example, the ground state of the hydrogen is labeled as (n,l,ml,ms )=(1,0,0,±½) which means the are two quantum states that can be occupied by the electron; (1,0,0,+½) or (1,0,0,-½). ...
... In order to complete the simulation of random quantum computers by classical computers of an infinite number of bits, we need first to simulate the five requirements imposed by DiVincenzo (Nakahara, 2004) on operative quantum computers. These five requirements are the following: a) The quantum degre ...
Theory of the Topological Anderson Insulator
... spin. We assume time reversal symmetry (no magnetic field or magnetic impurities) and neglect any coupling between the two spin blocks H and H [9]. The scalar potential U accounts for the disorder. The parameters , , , and m depend on the thickness and composition of the quantum well [7]. For t ...
... spin. We assume time reversal symmetry (no magnetic field or magnetic impurities) and neglect any coupling between the two spin blocks H and H [9]. The scalar potential U accounts for the disorder. The parameters , , , and m depend on the thickness and composition of the quantum well [7]. For t ...
Quantum Computers - Computing Sciences
... The essence of quantum cryptography is a way of transmitting a cryptography key without allowing anyone else to listen on the line. Because of the nature of quantum superposition, if a spy was measuring the key while it was being transmitted, the receiver would be able to tell that someone else had ...
... The essence of quantum cryptography is a way of transmitting a cryptography key without allowing anyone else to listen on the line. Because of the nature of quantum superposition, if a spy was measuring the key while it was being transmitted, the receiver would be able to tell that someone else had ...
QFT II
... To get the right result for (Dirac) fermion fields as quantum operators with anti-commutation relation the classical fields (plugged in the path integral) have to anti-commute, too. So we need the notion of anti-commuting numbers.First consider a finite # of d.o.f. by ψ A (t, x) → ψi (t) These ψi (t ...
... To get the right result for (Dirac) fermion fields as quantum operators with anti-commutation relation the classical fields (plugged in the path integral) have to anti-commute, too. So we need the notion of anti-commuting numbers.First consider a finite # of d.o.f. by ψ A (t, x) → ψi (t) These ψi (t ...
Course Syllabus - Guru Jambheshwar University of Science
... Energy stored in an electric and magnetic fields. Maxwell’s equations, power flow in an electromagnetic field and pointing theorem. Electromagnetic waves in a homogeneous medium-solution for free space conditions. Uniform plane waves, the wave equations for a conducting medium, Sinusoidal time varia ...
... Energy stored in an electric and magnetic fields. Maxwell’s equations, power flow in an electromagnetic field and pointing theorem. Electromagnetic waves in a homogeneous medium-solution for free space conditions. Uniform plane waves, the wave equations for a conducting medium, Sinusoidal time varia ...
Ensembles(b)
... coordinates if any). The possible quantum states are labelled by the indices si. Two cases need to be considered. In the classical case (Maxwell-Boltzmann statistics), the particles are considered distinguishable and any number particles can be in the same state s. The ‘classical’ case imposes no sy ...
... coordinates if any). The possible quantum states are labelled by the indices si. Two cases need to be considered. In the classical case (Maxwell-Boltzmann statistics), the particles are considered distinguishable and any number particles can be in the same state s. The ‘classical’ case imposes no sy ...
Quantum entanglement, topological order, and tensor category theory
... • Two string-net condensations → two topological orders: Levin-Wen 05 Z2 topo. order Sachdev Read 91, Wen 91 and double-semion topo. order. Xiao-Gang Wen, Perimeter/MIT ESI, Vienna, Aug., 2014 ...
... • Two string-net condensations → two topological orders: Levin-Wen 05 Z2 topo. order Sachdev Read 91, Wen 91 and double-semion topo. order. Xiao-Gang Wen, Perimeter/MIT ESI, Vienna, Aug., 2014 ...
In the early 1930s, the relativistic electron
... the cat – our propagator – will reveal peculiar behaviours. The case is that the propagator does not vanish for a space-like separation. This means we would have an interaction between space-time points not connectable with a classical electromagnetic wave. But in this quantum world the photons and ...
... the cat – our propagator – will reveal peculiar behaviours. The case is that the propagator does not vanish for a space-like separation. This means we would have an interaction between space-time points not connectable with a classical electromagnetic wave. But in this quantum world the photons and ...