Single-photon sources based on NV
... 2. G. Greenstein, A. G. Zajonc, “The Quantum Challenge: Modern Research on the Foundations of Quantum Mechanics” 2nd ed., Jones and Bartlett (2006). 3. A. Beveratos et al., “Single photon quantum cryptography”, PRL 89, 187901 (2002). 4. R. Brouri et al., “Photon antibunching in the fluorescence of i ...
... 2. G. Greenstein, A. G. Zajonc, “The Quantum Challenge: Modern Research on the Foundations of Quantum Mechanics” 2nd ed., Jones and Bartlett (2006). 3. A. Beveratos et al., “Single photon quantum cryptography”, PRL 89, 187901 (2002). 4. R. Brouri et al., “Photon antibunching in the fluorescence of i ...
Quantum Dot Single Photon Sources Quantum Dots
... In Situ Tuning of Single Quantum Dots In striking contrast to atoms artificial atoms (quantum dots) are not identical. An additinal „tuning knob“ is required, e.g. by applying external fields. Rastelli et al. [APL 90, 073120 (2007)] developed the method of in situ laser processing: A focussed laser ...
... In Situ Tuning of Single Quantum Dots In striking contrast to atoms artificial atoms (quantum dots) are not identical. An additinal „tuning knob“ is required, e.g. by applying external fields. Rastelli et al. [APL 90, 073120 (2007)] developed the method of in situ laser processing: A focussed laser ...
Eavesdropping of two-way coherent-state quantum cryptography via gaussian quantum cloning machines
... The state is finally sent back to Bob, who tries to guess Al-β, ice’s two numbers xA and pA by a joint measurement of conjugate observables. This is accomplished by a heterodyne detection [8] of the state, which will give an outcome ζ ≈ α + β. After the subtraction of the known value Bob achieves an ...
... The state is finally sent back to Bob, who tries to guess Al-β, ice’s two numbers xA and pA by a joint measurement of conjugate observables. This is accomplished by a heterodyne detection [8] of the state, which will give an outcome ζ ≈ α + β. After the subtraction of the known value Bob achieves an ...
Here
... mapped to the Gauss-Manin connection of the family Yb . The latter is the flat connection induced by the continuous family of lattices H ∗ (Y, Z) ⊂ H ∗ (Y, C). Given a family of symplectictomorphic spaces such as Yb , one can often produce a ‘symplectic connection’ which associates to a path in the ...
... mapped to the Gauss-Manin connection of the family Yb . The latter is the flat connection induced by the continuous family of lattices H ∗ (Y, Z) ⊂ H ∗ (Y, C). Given a family of symplectictomorphic spaces such as Yb , one can often produce a ‘symplectic connection’ which associates to a path in the ...
QUANTUM MEASURES and INTEGRALS
... first sight this theory appears to be quite specialized and its applicability has been restricted to the investigation of quantum histories and the related coevent interpretation of quantum mechanics [4, 7, 8, 14]. However, this article intends to demonstrate that quantum measure theory may have wid ...
... first sight this theory appears to be quite specialized and its applicability has been restricted to the investigation of quantum histories and the related coevent interpretation of quantum mechanics [4, 7, 8, 14]. However, this article intends to demonstrate that quantum measure theory may have wid ...
Classical mechanics: x(t), y(t), z(t) specifies the system completely
... Postulates did not state anything regarding what a measurement actually is! Postulates only state that there is a corresponding Postulates only state that there is a corresponding operator associated with a measurement, and that the wavefunction ‘collapses’ collapses into a specific eigenvecto ...
... Postulates did not state anything regarding what a measurement actually is! Postulates only state that there is a corresponding Postulates only state that there is a corresponding operator associated with a measurement, and that the wavefunction ‘collapses’ collapses into a specific eigenvecto ...
... The indicated uncertainty is the standard deviation accounting for the Poisson law in photon counting. The impressive violation of inequalities (2) is 83/0 of the maximum violation predicted by quantum mechanics with ideal polarizers (the largest violation of generalized Bell' s inequalities previou ...
The Heisenberg Uncertainty derivations
... For example, if E=2V0, then quantum mechanics predicts R=0.17 – hence we should see reflection a moderate fraction of the time. But if we actually go to the lab and set up a potential that approximates the above step potential and then send in a baseball with twice the energy of the step, we in fact ...
... For example, if E=2V0, then quantum mechanics predicts R=0.17 – hence we should see reflection a moderate fraction of the time. But if we actually go to the lab and set up a potential that approximates the above step potential and then send in a baseball with twice the energy of the step, we in fact ...
L14special - Particle Physics and Particle Astrophysics
... impossible to say in advance of the measurement what value will be obtained for the electrons position and momentum. ...
... impossible to say in advance of the measurement what value will be obtained for the electrons position and momentum. ...
Quantum Information and Spacetime
... Quantum fluctuations in the vacuum continually create pairs of virtual particles, which then reannihilate. But if one member of the pair ducks behind the event horizon, the other escapes. To an observer far away, the black hole seems to be a source of featureless thermal radiation with wavelength co ...
... Quantum fluctuations in the vacuum continually create pairs of virtual particles, which then reannihilate. But if one member of the pair ducks behind the event horizon, the other escapes. To an observer far away, the black hole seems to be a source of featureless thermal radiation with wavelength co ...
Quantum computing
Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.