The Structure of Scientific Theory Change
... and that a theory of theories should take this incompleteness, and the attendant role that theories play in theory construction, into account. The purpose of the present work is twofold. Its primary purpose is to indicate that this third role of theories—the construction of their successors—should b ...
... and that a theory of theories should take this incompleteness, and the attendant role that theories play in theory construction, into account. The purpose of the present work is twofold. Its primary purpose is to indicate that this third role of theories—the construction of their successors—should b ...
Axiomatic and constructive quantum field theory Thesis for the
... a quantum theory that would be compatible with special relativity. Although this theory is used to describe high-energy sub-atomic particles, the fundamental objects of the theory are fields. The theoretical predictions that can be made with QFT have been tested several times against experimental re ...
... a quantum theory that would be compatible with special relativity. Although this theory is used to describe high-energy sub-atomic particles, the fundamental objects of the theory are fields. The theoretical predictions that can be made with QFT have been tested several times against experimental re ...
The Physics of the Large and Small
... its terminal velocity is lower than the speed at which it can land unhurt.” Haldane said you can drop a mouse down a thousand-foot mineshaft and it will walk away, “so long as the ground is fairly soft.” Not so with a rat, or any larger animal, if you were wondering. He says: To the mouse and any sm ...
... its terminal velocity is lower than the speed at which it can land unhurt.” Haldane said you can drop a mouse down a thousand-foot mineshaft and it will walk away, “so long as the ground is fairly soft.” Not so with a rat, or any larger animal, if you were wondering. He says: To the mouse and any sm ...
... The primary aim of this one-year, full-time course is to provide specialist postgraduate training in modern optics and semiconductor physics, tailored to the needs of the Photonics industrial sector. The secondary aim is to provide the education required for those wishing to continue in academia on ...
A 2D Quantum Walk Simulation of Two
... of complex graph structures in higher dimensions, experimental implementations are still limited by the required physical resources. All demonstrated quantum walks have so far been restricted to evolution in one dimension. They have been realized in a variety of architectures, including photonic [9– ...
... of complex graph structures in higher dimensions, experimental implementations are still limited by the required physical resources. All demonstrated quantum walks have so far been restricted to evolution in one dimension. They have been realized in a variety of architectures, including photonic [9– ...
A conformal field theory approach to the fractional quantum Hall
... number of faulty calculations, but they are not perfect. One of the possible solutions to this problem is to make a fault tolerant (topological) quantum computer by using non-abelian anyons as the qubits. The space in which the calculations take place is then the degenerate ground state and the quan ...
... number of faulty calculations, but they are not perfect. One of the possible solutions to this problem is to make a fault tolerant (topological) quantum computer by using non-abelian anyons as the qubits. The space in which the calculations take place is then the degenerate ground state and the quan ...
![Theoretical Physics II B – Quantum Mechanics [1cm] Lecture 8](http://s1.studyres.com/store/data/004850917_1-fa2fc63a7feab663fd3f9ddfe650a8b4-300x300.png)
Two arguments that the nontrivial zeros of the Riemann zeta function
... 1989 B. Conrey [2] improved this to two-fifths and quite recently with collaborators [1] to over 41%. It was checked computationally [5] that the 1013 first zeros of the Riemann Zeta function fulfill the condition βl = 12 . A. Odlyzko checked that RH is true in different intervals around 1020 [10], ...
... 1989 B. Conrey [2] improved this to two-fifths and quite recently with collaborators [1] to over 41%. It was checked computationally [5] that the 1013 first zeros of the Riemann Zeta function fulfill the condition βl = 12 . A. Odlyzko checked that RH is true in different intervals around 1020 [10], ...
Aalborg Universitet
... e.g. [10, 11, 23, 27–29] and references therein), and at the level of rigorous mathematical physics (see e.g. [3–6, 9, 13, 17–19, 25, 31, 32] and references therein). It started with the computation by Dirac of the decay rate in second order time-dependent perturbation theory, leading to the well kn ...
... e.g. [10, 11, 23, 27–29] and references therein), and at the level of rigorous mathematical physics (see e.g. [3–6, 9, 13, 17–19, 25, 31, 32] and references therein). It started with the computation by Dirac of the decay rate in second order time-dependent perturbation theory, leading to the well kn ...
Experimental Optimal Cloning of Four
... corresponding coefficients in the clone density matrix in Eq. (1). The cloning fidelity is F ¼ pð’ j ’Þ. The experimental results obtained when cloning all states of the logical basis are reported in Figs. 2(b) and 2(c). The measured values of the fidelity, as well as their average value F I ¼ ð0:7 ...
... corresponding coefficients in the clone density matrix in Eq. (1). The cloning fidelity is F ¼ pð’ j ’Þ. The experimental results obtained when cloning all states of the logical basis are reported in Figs. 2(b) and 2(c). The measured values of the fidelity, as well as their average value F I ¼ ð0:7 ...
Fast Field Cycling NMR Relaxometry
... Shows that full-fledged electromagnetic waves are involved To do: try it at different frequencies, electro-inductive probeheads ...
... Shows that full-fledged electromagnetic waves are involved To do: try it at different frequencies, electro-inductive probeheads ...
Coherent manipulations of charge-number states in a Cooper-pair box Y. Nakamura,
... Suppose there are two superconductors coupled via a thin insulating barrier (Josephson junction; Fig. 1(a)). Let us define charge-number states with |n where n is a number of excess Cooper pairs in the right electrode. Because of the conservation of the total charge, the left electrode has (−n) exce ...
... Suppose there are two superconductors coupled via a thin insulating barrier (Josephson junction; Fig. 1(a)). Let us define charge-number states with |n where n is a number of excess Cooper pairs in the right electrode. Because of the conservation of the total charge, the left electrode has (−n) exce ...
Long-range Rydberg-Rydberg interactions in calcium, strontium and
... framework of the Coulomb approximation. This approach yields accurate results for sufficiently high principal quantum numbers and does not require any other input than orbital angular momentum quantum numbers and binding energies. The latter are obtained from experimental data. The calculation of th ...
... framework of the Coulomb approximation. This approach yields accurate results for sufficiently high principal quantum numbers and does not require any other input than orbital angular momentum quantum numbers and binding energies. The latter are obtained from experimental data. The calculation of th ...
ABSTRACT ACCELERATION AND OBSERVER DEPENDENCE OF
... lacking in the literature. Observers moving with constant proper acceleration (Rindler observers [1]) are the most widely used description of such behavior so far, especially in discussions of the thermal properties of vacuum states in quantum field theories [2]. In this work we derive the trajector ...
... lacking in the literature. Observers moving with constant proper acceleration (Rindler observers [1]) are the most widely used description of such behavior so far, especially in discussions of the thermal properties of vacuum states in quantum field theories [2]. In this work we derive the trajector ...
Renormalization group
In theoretical physics, the renormalization group (RG) refers to a mathematical apparatus that allows systematic investigation of the changes of a physical system as viewed at different distance scales. In particle physics, it reflects the changes in the underlying force laws (codified in a quantum field theory) as the energy scale at which physical processes occur varies, energy/momentum and resolution distance scales being effectively conjugate under the uncertainty principle (cf. Compton wavelength).A change in scale is called a ""scale transformation"". The renormalization group is intimately related to ""scale invariance"" and ""conformal invariance"", symmetries in which a system appears the same at all scales (so-called self-similarity). (However, note that scale transformations are included in conformal transformations, in general: the latter including additional symmetry generators associated with special conformal transformations.)As the scale varies, it is as if one is changing the magnifying power of a notional microscope viewing the system. In so-called renormalizable theories, the system at one scale will generally be seen to consist of self-similar copies of itself when viewed at a smaller scale, with different parameters describing the components of the system. The components, or fundamental variables, may relate to atoms, elementary particles, atomic spins, etc. The parameters of the theory typically describe the interactions of the components. These may be variable ""couplings"" which measure the strength of various forces, or mass parameters themselves. The components themselves may appear to be composed of more of the self-same components as one goes to shorter distances.For example, in quantum electrodynamics (QED), an electron appears to be composed of electrons, positrons (anti-electrons) and photons, as one views it at higher resolution, at very short distances. The electron at such short distances has a slightly different electric charge than does the ""dressed electron"" seen at large distances, and this change, or ""running,"" in the value of the electric charge is determined by the renormalization group equation.