TiberCAD: towards multiscale simulation of optoelectronic devices
... Strain (including piezoelectric effect) Semi-classical transport of electrons / holes / excitons (+ Poisson) Heat transport Quantum mechanics based on k.p envelope function approximation Atomistic description via Density Functional Tight-Binding (DFTB, from Frauenheim group, Bremen) or Empirical Tig ...
... Strain (including piezoelectric effect) Semi-classical transport of electrons / holes / excitons (+ Poisson) Heat transport Quantum mechanics based on k.p envelope function approximation Atomistic description via Density Functional Tight-Binding (DFTB, from Frauenheim group, Bremen) or Empirical Tig ...
Topological order at finite temperature?
... Non locality ⇒ strong protection from zero-temperature perturbations (non-local tunneling events are suppressed exponentially in system size) What about thermal fluctuations? I ...
... Non locality ⇒ strong protection from zero-temperature perturbations (non-local tunneling events are suppressed exponentially in system size) What about thermal fluctuations? I ...
Deformed Generalization of the Semiclassical Entropy
... for problems with more than a few degrees of freedom. Another great advantage of the semiclassical approximation lies in that it facilitates an intuitive understanding of the underlying physics, which is usually hidden in blind numerical solutions of the Schrödinger equation. Although semiclassical ...
... for problems with more than a few degrees of freedom. Another great advantage of the semiclassical approximation lies in that it facilitates an intuitive understanding of the underlying physics, which is usually hidden in blind numerical solutions of the Schrödinger equation. Although semiclassical ...
Finite Element Method for Finite-Size Scaling in Quantum Mechanics
... the wave function is expanded, to order N, in a complete basis set. The order of the expansion is analogous to the system size of the standard FSS method used in statistical mechanics. Thus, increasing the order of the expansion corresponds to an increase in the finite size. It is worth noting at th ...
... the wave function is expanded, to order N, in a complete basis set. The order of the expansion is analogous to the system size of the standard FSS method used in statistical mechanics. Thus, increasing the order of the expansion corresponds to an increase in the finite size. It is worth noting at th ...
Polarization control of single photon quantum
... be achieved. A promising approach to this purpose is based on the properties of an optical device, named “q-plate”, that has been recently introduced both in the classical [17] and in the quantum domains [18]. The main feature of the q-plate is its capability of coupling the spinorial (polarization) ...
... be achieved. A promising approach to this purpose is based on the properties of an optical device, named “q-plate”, that has been recently introduced both in the classical [17] and in the quantum domains [18]. The main feature of the q-plate is its capability of coupling the spinorial (polarization) ...
Multiverse or Universe, after all
... In this paper the concept of multiverse is philosophically discussed, starting from two points: 1. the controversy between metaphysical “modal realism” (David Lewis) and “actualism” (Saul Kripke); 2. the four-level hierarchy of multiverses, proposed by the cosmologist Max Tegmark (2003). Here we tak ...
... In this paper the concept of multiverse is philosophically discussed, starting from two points: 1. the controversy between metaphysical “modal realism” (David Lewis) and “actualism” (Saul Kripke); 2. the four-level hierarchy of multiverses, proposed by the cosmologist Max Tegmark (2003). Here we tak ...
majorization and quantum entanglement
... since the uniform distribution (1=d; : : : ; 1=d) may be obtained by averaging over permutations P s of s, where is chosen uniformly at random from the symmetric group on d elements. This simple example agrees with our intuition that the uniform distribution on d elements is at least as disordere ...
... since the uniform distribution (1=d; : : : ; 1=d) may be obtained by averaging over permutations P s of s, where is chosen uniformly at random from the symmetric group on d elements. This simple example agrees with our intuition that the uniform distribution on d elements is at least as disordere ...
The Wave Function
... The Heisenberg relation has an immediate interpretation. It tells us that we cannot determine, 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 th ...
... The Heisenberg relation has an immediate interpretation. It tells us that we cannot determine, 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 th ...
SUPERCONDUCTING QUBITS II: DECOHERENCE F.K. Wilhelm , M.J. Storcz and U. Hartmann
... which conserves entropy. Indeed, also the CPT theorem of relativistic quantum mechanics (Sakurai, 1967) states, that for each quantum system it is possible to find a counterpart (with inversed parity and charge) whose time arrow runs backwards. The apparent contradiction between microreversibility — ...
... which conserves entropy. Indeed, also the CPT theorem of relativistic quantum mechanics (Sakurai, 1967) states, that for each quantum system it is possible to find a counterpart (with inversed parity and charge) whose time arrow runs backwards. The apparent contradiction between microreversibility — ...
3 Ion Trap Implementations
... hold almost every ion, only a few ions are suitable for quantum computation. The following requirements should be met: • The electronic level structure should be simple to allow the realization of a closed two level system without the need of too many lasers. • The levels used for the qubit transiti ...
... hold almost every ion, only a few ions are suitable for quantum computation. The following requirements should be met: • The electronic level structure should be simple to allow the realization of a closed two level system without the need of too many lasers. • The levels used for the qubit transiti ...
Logical error rate in the Pauli twirling approximation Amara Katabarwa
... require a time exponential in the number of particles to simulate quantum phenomena, while his proposed simulator made from quantum components would avoid such a scaling. A surge of interest grew around the nascent field of quantum information theory when Shor discovered his now famous algorithm,2 w ...
... require a time exponential in the number of particles to simulate quantum phenomena, while his proposed simulator made from quantum components would avoid such a scaling. A surge of interest grew around the nascent field of quantum information theory when Shor discovered his now famous algorithm,2 w ...
Chapter Four - Seeking Wisdom
... came about by chance. Nor can random variation and natural selection account for the fact that evolutionary changes often seem to occur rather suddenly, rather than in gradual increments, as the theory of natural selection would suggest. A retina or a cornea, after all, without the rest of the organ ...
... came about by chance. Nor can random variation and natural selection account for the fact that evolutionary changes often seem to occur rather suddenly, rather than in gradual increments, as the theory of natural selection would suggest. A retina or a cornea, after all, without the rest of the organ ...
Kurt Symanzik—a stable fixed point beyond triviality
... g0 < 0. Indeed, for boson fields a classical limiting case exists in which each state may contain many particles. For g0 < 0 the energy of the classical field ϕ, . . . , is not positive definite and can decrease indefinitely with increase of the field amplitude ϕ. Physically this means that it shoul ...
... g0 < 0. Indeed, for boson fields a classical limiting case exists in which each state may contain many particles. For g0 < 0 the energy of the classical field ϕ, . . . , is not positive definite and can decrease indefinitely with increase of the field amplitude ϕ. Physically this means that it shoul ...
Self-Reference, Biologic and the Structure of Reproduction
... by Hide [9] in discussion the Necker Cube and multiple interpretations associated with it and dependent on stories related to it. In the body of the paper, I shall make other phenomenological remarks about the various aspects and themes of the paper. Along with these forays into experimentation, the ...
... by Hide [9] in discussion the Necker Cube and multiple interpretations associated with it and dependent on stories related to it. In the body of the paper, I shall make other phenomenological remarks about the various aspects and themes of the paper. Along with these forays into experimentation, the ...
Lecture 20
... Modern computers: failure rate is below one error in 1017 operations Data transmission and storage (file transfers, cell phones, DVD, CD, etc.): noise problems Solution: use error-correcting codes to protect against the effect of noise. Key idea: encode the message with redundant information. Redund ...
... Modern computers: failure rate is below one error in 1017 operations Data transmission and storage (file transfers, cell phones, DVD, CD, etc.): noise problems Solution: use error-correcting codes to protect against the effect of noise. Key idea: encode the message with redundant information. Redund ...
Quantum Structures
... Paolo Perinotti∗ In a recent paper [1], the mathematical structure of finite dimensional Hilbert spaces and the description of states, evolutions and measurements through density matrices, completely positive maps and POVMs has been derived from principles ruling information processing tasks. This r ...
... Paolo Perinotti∗ In a recent paper [1], the mathematical structure of finite dimensional Hilbert spaces and the description of states, evolutions and measurements through density matrices, completely positive maps and POVMs has been derived from principles ruling information processing tasks. This r ...
continuous vs discrete processes: the
... transitions from one level to another in accordance with the probabilities of a Markov transition-matrix. Many investigators on the other hand, who are of the opinion that quantum mechanics precludes transitions of this kind having any ontological status, interpret the transitions as measurement-ind ...
... transitions from one level to another in accordance with the probabilities of a Markov transition-matrix. Many investigators on the other hand, who are of the opinion that quantum mechanics precludes transitions of this kind having any ontological status, interpret the transitions as measurement-ind ...