Quantum many-particle electron transport in time-dependent systems with Bohmian trajectories by Alfonso Alarc´
... Schematic representation of the I-V curve of a typical RTD. The resonant energy inside the quantum well acts like an energetic filter that lets the electrons from the source to arrive at the drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RTD Current-voltage characte ...
... Schematic representation of the I-V curve of a typical RTD. The resonant energy inside the quantum well acts like an energetic filter that lets the electrons from the source to arrive at the drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RTD Current-voltage characte ...
To appear in Acta Physica Polonica B hep-ph/9606263 DCC
... results have already been found long ago, but forgotten for various reasons, mostly because they were apparently lacking theoretical underpinning. They have been rediscovered independently in the new context, with a better motivation. Actualy the true history of DCC research begins in the early 90’s ...
... results have already been found long ago, but forgotten for various reasons, mostly because they were apparently lacking theoretical underpinning. They have been rediscovered independently in the new context, with a better motivation. Actualy the true history of DCC research begins in the early 90’s ...
Philosophy of Science, 69 (December 2002) pp
... In view of the generality of this question one may surmise that the answer to it is "yes"; that is to say, one may conjecture that given any two correlations there can always exist a Reichenbachian common-cause which is a common-cause for both correlations, since, one may reason, we just have to ref ...
... In view of the generality of this question one may surmise that the answer to it is "yes"; that is to say, one may conjecture that given any two correlations there can always exist a Reichenbachian common-cause which is a common-cause for both correlations, since, one may reason, we just have to ref ...
The Computational Complexity of Linear Optics
... been a major application of high-performance computing, and Nobel Prizes have been awarded for methods (such as the Density Functional Theory) to handle special cases. What Shor’s result shows is that, if we had an efficient, general-purpose solution to the quantum simulation problem, then we could ...
... been a major application of high-performance computing, and Nobel Prizes have been awarded for methods (such as the Density Functional Theory) to handle special cases. What Shor’s result shows is that, if we had an efficient, general-purpose solution to the quantum simulation problem, then we could ...
String theory as a Lilliputian world
... as follows (for a closed string): compactify one of the lattice directions to m links and insist that the string wraps around this dimension once. We still assume that the string propagates n links in one of the other lattice directions. Again one can show that ...
... as follows (for a closed string): compactify one of the lattice directions to m links and insist that the string wraps around this dimension once. We still assume that the string propagates n links in one of the other lattice directions. Again one can show that ...
Why Philosophers Should Care About
... results from the field devoted to it. Perhaps the closest in spirit to this essay are the interesting articles by Cherniak [40] and Morton [98]. In addition, many writers have made some version of the observations in Section 4, about computational complexity and the Turing Test: see for example Bloc ...
... results from the field devoted to it. Perhaps the closest in spirit to this essay are the interesting articles by Cherniak [40] and Morton [98]. In addition, many writers have made some version of the observations in Section 4, about computational complexity and the Turing Test: see for example Bloc ...
Design of Reversible Logic based Basic Combinational Circuits
... computing, Optical computing and nano technologies. we have reversible circuits which dissipates no power or with zero internal power dissipation.. So there is a need for building combinational and sequential reversible circuits so that future computer can be replaced.. Attempt is made in this paper ...
... computing, Optical computing and nano technologies. we have reversible circuits which dissipates no power or with zero internal power dissipation.. So there is a need for building combinational and sequential reversible circuits so that future computer can be replaced.. Attempt is made in this paper ...
The Wave Function
... from knowledge of the wave function alone, the exact position and momentum of a particle at the same time. In the extreme case that ∆x = 0, then the position uncertainty is zero, but Eq. (3.14) tells us that the uncertainty on the momentum is infinite, i.e. the momentum is entirely unknown. A simila ...
... from knowledge of the wave function alone, the exact position and momentum of a particle at the same time. In the extreme case that ∆x = 0, then the position uncertainty is zero, but Eq. (3.14) tells us that the uncertainty on the momentum is infinite, i.e. the momentum is entirely unknown. A simila ...
Nanosecond pulsed field emission from single
... An air-core resonant transformer technology was used to generate the pulsed accelerating diode voltage.33 Figure 4 shows the accelerating voltage wave form of the diode gun, as measured by a calibrated capacitive divider.33 The full width half maximum 共FWHM兲 duration of the first negative pulse peak ...
... An air-core resonant transformer technology was used to generate the pulsed accelerating diode voltage.33 Figure 4 shows the accelerating voltage wave form of the diode gun, as measured by a calibrated capacitive divider.33 The full width half maximum 共FWHM兲 duration of the first negative pulse peak ...
FPGA emulation of quantum circuits
... need to store the values of α and β to describe a qubit. The finite precision description of α and β introduces imprecision errors, as quantum gates involve operations like add and multiply on α and β. To keep the size of the quantum circuit to a manageable proportion, we implement the α and β using ...
... need to store the values of α and β to describe a qubit. The finite precision description of α and β introduces imprecision errors, as quantum gates involve operations like add and multiply on α and β. To keep the size of the quantum circuit to a manageable proportion, we implement the α and β using ...
Ground state and dynamic structure of quantum fluids
... therefore it behaves as a boson. On the other hand, the number of fermionic constituents in 3 He is odd, its total spin is 1/2 and it behaves as a fermion. The different statistical character of the two helium isotopes produces dramatic differences in their physical properties. So far, a huge amount ...
... therefore it behaves as a boson. On the other hand, the number of fermionic constituents in 3 He is odd, its total spin is 1/2 and it behaves as a fermion. The different statistical character of the two helium isotopes produces dramatic differences in their physical properties. So far, a huge amount ...
MATHEMATICAL HISTORY OF WAVE AND MATRIX QUANTUM
... However, this conception did not provide a better explanation for the spectra of the atoms. It was impossible to understand why atomic spectra consisted of sharp lines at all. Moreover, according to classical electrodynamic theory, electrons had to fall onto the nucleus because their motion would em ...
... However, this conception did not provide a better explanation for the spectra of the atoms. It was impossible to understand why atomic spectra consisted of sharp lines at all. Moreover, according to classical electrodynamic theory, electrons had to fall onto the nucleus because their motion would em ...
In search of symmetry lost
... founded on deep, powerful concepts. Because of this they are tight, both conceptually and algorithmically. The gauge system is constructed as the embodiment of extensive symmetries involving transformations among different kinds of ‘colour’ degrees of freedom. Colour used in this sense has nothing t ...
... founded on deep, powerful concepts. Because of this they are tight, both conceptually and algorithmically. The gauge system is constructed as the embodiment of extensive symmetries involving transformations among different kinds of ‘colour’ degrees of freedom. Colour used in this sense has nothing t ...
Quasiclassical Coarse Graining and Thermodynamic Entropy∗
... is made natural by our limited powers of observation and computation. But in the modern quantum mechanics of closed systems, some measure of coarse graining is inescapable because there are no non-trivial, probabilistic, fine-grained descriptions. This essay explores the consequences of that fact. Q ...
... is made natural by our limited powers of observation and computation. But in the modern quantum mechanics of closed systems, some measure of coarse graining is inescapable because there are no non-trivial, probabilistic, fine-grained descriptions. This essay explores the consequences of that fact. Q ...
Unscrambling the Quantum Omelette of Epistemic and Ontic
... In this paper we attempt to analyze the physical and philosophical meaning of quantum contextuality. In the first part we will argue that a general confusion within the literature comes from the improper “scrambling” of two different meanings of quantum contextuality. The first one is related to an ...
... In this paper we attempt to analyze the physical and philosophical meaning of quantum contextuality. In the first part we will argue that a general confusion within the literature comes from the improper “scrambling” of two different meanings of quantum contextuality. The first one is related to an ...
Griffiths-McCoy singularities in the random transverse-field Ising spin chain Ferenc Iglo´i
... quantum model!4 therefore we call the Griffiths singularities in quantum systems Griffiths-McCoy singularities. Many of the theoretical studies on random quantum systems are related to random quantum ferromagnets5 and quantum spin glasses,6 which also have experimental realizations.7 In higher (d52 ...
... quantum model!4 therefore we call the Griffiths singularities in quantum systems Griffiths-McCoy singularities. Many of the theoretical studies on random quantum systems are related to random quantum ferromagnets5 and quantum spin glasses,6 which also have experimental realizations.7 In higher (d52 ...
Quantum electrodynamics
In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of matter and light interaction.In technical terms, QED can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it ""the jewel of physics"" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the electron and the Lamb shift of the energy levels of hydrogen.