A Classical-Light Attack on Energy-Time Entangled Quantum Key Distribution, and Countermeasures
... QKD uses polarization of individual photons, but the development of energytime entanglement could lead to QKD protocols robust against environmental effects. The security proofs of energy-time entangled QKD rely on a violation of the Bell inequality to certify the system as secure. This thesis shows ...
... QKD uses polarization of individual photons, but the development of energytime entanglement could lead to QKD protocols robust against environmental effects. The security proofs of energy-time entangled QKD rely on a violation of the Bell inequality to certify the system as secure. This thesis shows ...
Interaction- and measurement-free quantum Zeno gates for universal computation
... effective measurement duration is 4⌫−1. The effective number of measurements M eff during an interval t is therefore t / 4⌫−1 = ⌫t / 4. Equations 共5兲 and 共1兲 are in this sense exactly equivalent. We note that a large M eff corresponds to a large ratio of ⌫ / ⍀, and hence a stronger dissipation is fa ...
... effective measurement duration is 4⌫−1. The effective number of measurements M eff during an interval t is therefore t / 4⌫−1 = ⌫t / 4. Equations 共5兲 and 共1兲 are in this sense exactly equivalent. We note that a large M eff corresponds to a large ratio of ⌫ / ⍀, and hence a stronger dissipation is fa ...
p Bogdan A. Bernevig JiangPing Hu
... combination of the components of a gauge field, Gij = 共2 − 13/ 4兲⑀ijlkl / k3, clearly reflecting a monopole structure in k space. The singularity at k → 0 exemplifies the confluence of the Kramers’ doublets at the ⌫ point where the band becomes fourfold degenerate, but the flux of the gauge field ...
... combination of the components of a gauge field, Gij = 共2 − 13/ 4兲⑀ijlkl / k3, clearly reflecting a monopole structure in k space. The singularity at k → 0 exemplifies the confluence of the Kramers’ doublets at the ⌫ point where the band becomes fourfold degenerate, but the flux of the gauge field ...
Totally secure classical communication utilizing Johnson (
... resistance is either the lowest or the highest of the three possibilities, thus she can find out the resistor value and the status of the information bit at the sender. Thus such a bit is not secure and cannot be used for secure data transfer. On the average, the 50% of the sender and receiver bits ...
... resistance is either the lowest or the highest of the three possibilities, thus she can find out the resistor value and the status of the information bit at the sender. Thus such a bit is not secure and cannot be used for secure data transfer. On the average, the 50% of the sender and receiver bits ...
Is Matter Made of Light? The Transluminal Energy Quantum (TEQ
... electrically charged particle spinning on its own axis, and whose spin value or and its magnetic moment by angular momentum is given by ...
... electrically charged particle spinning on its own axis, and whose spin value or and its magnetic moment by angular momentum is given by ...
Phase diffusion pattern in quantum nondemolition systems
... squeezing parameter r, defined by (15), as is evident from a comparison of the large-dashed and the dot-dashed curves. Also by comparing the dot-dashed and double dot-dashed curves indicating the same environmental conditions but different evolution times t, it can be seen that an increase in exposu ...
... squeezing parameter r, defined by (15), as is evident from a comparison of the large-dashed and the dot-dashed curves. Also by comparing the dot-dashed and double dot-dashed curves indicating the same environmental conditions but different evolution times t, it can be seen that an increase in exposu ...
The quantum mechanical tipping pencil--
... energy solution—the shapes are right, but the amplitudes do not accurately reflect the behaviour of a pencil. The actual amplitudes of the two oscillatory solutions cannot be drawn on the same graph; they are different by many orders of magnitude. Classically, the pencil is balanced and will not fal ...
... energy solution—the shapes are right, but the amplitudes do not accurately reflect the behaviour of a pencil. The actual amplitudes of the two oscillatory solutions cannot be drawn on the same graph; they are different by many orders of magnitude. Classically, the pencil is balanced and will not fal ...
Section 7.5 Quantum Mechanics and the Atom
... Atomic Spectroscopy and the Bohr Model The Bohr Model • So basically what we need is a new kind of physics to explain the behavior of the atom. • This process had already begun with the breaking down of the barrier between light as a wave and matter as a particle. • Einstein showed that light behave ...
... Atomic Spectroscopy and the Bohr Model The Bohr Model • So basically what we need is a new kind of physics to explain the behavior of the atom. • This process had already begun with the breaking down of the barrier between light as a wave and matter as a particle. • Einstein showed that light behave ...
A minus sign that used to annoy me but now I know why it is there
... discuss how the two constructions are related. The Kauffman bracket is an isotopy invariant of framed links, but the functor used in the quantum group construction involves a category where morphisms are tangles of directed framed links. However, in the case we consider, the final quantum group inva ...
... discuss how the two constructions are related. The Kauffman bracket is an isotopy invariant of framed links, but the functor used in the quantum group construction involves a category where morphisms are tangles of directed framed links. However, in the case we consider, the final quantum group inva ...
Coherent State Path Integrals
... Therefore the path integral for a system of non-relativistic bosons (with chemical potential µ) has the same form os the path integral of the charged scalar field we discussed before except that the action is first order in time derivatives. th fact that the field is complex follows from the require ...
... Therefore the path integral for a system of non-relativistic bosons (with chemical potential µ) has the same form os the path integral of the charged scalar field we discussed before except that the action is first order in time derivatives. th fact that the field is complex follows from the require ...
Determination of Enzymatic Reaction Pathways Using QM/MM
... The main concepts of QM/MM methods defined in the preceeding section (i.e., splitting a molecular system in two parts and ensuring a proper interaction between them) has proved successful especially in the study of chemical reactions in solution. Usually, in these systems the reactants (a set of smal ...
... The main concepts of QM/MM methods defined in the preceeding section (i.e., splitting a molecular system in two parts and ensuring a proper interaction between them) has proved successful especially in the study of chemical reactions in solution. Usually, in these systems the reactants (a set of smal ...
Particle In A Box
... In this chapter, we have studied the particle in a box problem. This is probably the simplest problem in quantum theory and the problem is exactly soluble. The Schrodinger equation for a one dimensional box was obtained by replacing the dynamical variable for the kinetic energy by the corresponding ...
... In this chapter, we have studied the particle in a box problem. This is probably the simplest problem in quantum theory and the problem is exactly soluble. The Schrodinger equation for a one dimensional box was obtained by replacing the dynamical variable for the kinetic energy by the corresponding ...
Phase-controlled localization and directed
... extreme localization was later found to be associated with the coherent destruction of tunneling (CDT) [2, 6, 7] at a collapse point of the Floquet quasienergy spectrum [8], and has also been observed in different systems [9–12]. Generally, the dynamical localization (DL) refers to the phenomenon wh ...
... extreme localization was later found to be associated with the coherent destruction of tunneling (CDT) [2, 6, 7] at a collapse point of the Floquet quasienergy spectrum [8], and has also been observed in different systems [9–12]. Generally, the dynamical localization (DL) refers to the phenomenon wh ...
A New Form of Matter (pdf, 217 kB)
... Bose-Einstein condensates ("BECs" for short) aren't like the solids, liquids and gases that we learned about in school. They are not vaporous, not hard, not fluid. Indeed, there are no ordinary words to describe them because they come from another world -- the world of quantum mechanics. Quantum mec ...
... Bose-Einstein condensates ("BECs" for short) aren't like the solids, liquids and gases that we learned about in school. They are not vaporous, not hard, not fluid. Indeed, there are no ordinary words to describe them because they come from another world -- the world of quantum mechanics. Quantum mec ...
Basics of Lattice Quantum Field Theory∗
... a−12hϕ̃ϕ̃ϕ̃ϕ̃ icon = Z 2(factors) gR Now all correlations are conjectured to have a NP UV+IR limit Z −n/2hϕ(x(1))ϕ(x(2)) ϕ(x(n))i = mnR f (mRx(i); gR) × [1 + O(a2m2R) + O(e−cmRL)] ...
... a−12hϕ̃ϕ̃ϕ̃ϕ̃ icon = Z 2(factors) gR Now all correlations are conjectured to have a NP UV+IR limit Z −n/2hϕ(x(1))ϕ(x(2)) ϕ(x(n))i = mnR f (mRx(i); gR) × [1 + O(a2m2R) + O(e−cmRL)] ...
