Decoherence: Theoretical, experimental and conceptual by P. Blanchard, D. Giulini, E. Joos, C. Kiefer, I.-O.

By P. Blanchard, D. Giulini, E. Joos, C. Kiefer, I.-O. Stamatescu

Decoherence is a quantum-mechanical procedure that dynamically describes the obvious lack of quantum coherence because of coupling of the approach un- der statement to different levels of freedom, which break out direct remark. regular examples are given by way of scattering procedures, during which the off-scattered debris (and/or radiation) should not detected. In such techniques quantum correlations among the saw process and its atmosphere develop into delo- calized in an successfully irreversible demeanour. Such quantum correlations can neither be visible through observations on one or the opposite method by myself, nor inter- preted as statistical correlations among current (i.e., outlined, yet potentially unknown) states of neighborhood platforms. they really mirror the non-local nature of quantum mechanics.

Show description

Read or Download Decoherence: Theoretical, experimental and conceptual problems Proc. Bielefeld 1998 PDF

Best quantum physics books

Quantum mechanics: an empiricist's view

After introducing the empiricist viewpoint in philosophy of technological know-how, and the options and strategies of the semantic method of medical theories, van Fraassen discusses quantum thought in 3 phases. He first examines the query of no matter if and the way empirical phenomena require a non-classical conception, and how much concept they require.

Foundations of Quantum Mechanics I

This booklet is the 1st quantity of a two-volume paintings at the Foundations of Quantum Mechanics, and is meant as a brand new variation of the author's e-book Die Grundlagen der Quantenmechanik [37] which was once released in 1954. during this two-volume paintings we'll search to procure a far better formula of the translation of quantum mechanics in line with experiments.

Quantum versus Chaos: Questions Emerging from Mesoscopic Cosmos

Quantum and chaos, key strategies in modern technology, are incompatible by means of nature. This quantity provides an research into quantum delivery in mesoscopic or nanoscale structures that are classically chaotic and exhibits the good fortune and failure of quantal, semiclassical, and random matrix theories in facing questions rising from the mesoscopic cosmos.

Extra info for Decoherence: Theoretical, experimental and conceptual problems Proc. Bielefeld 1998

Example text

For a typical 1-D energy band, sketch graphs of the relationships between the wave vector, k, of an electron and its: (a) energy, E k 0 (b) group velocity, Vg k 0 (c) and effective mass. m* k 0 10 - 2 d. The approximate density-of-states D(1) (E) ) for the energy band of part a aboveis (1) D (E) k 0 10-4. The E(k x) vs. k x dependence for an electron in the conduction band of a one-dimensional semiconductor crystal with lattice constant a = 4 Å is given by: E (kx ) = E 2 −( E 2 − E1 )cos 2[k x a /2] ; E 2 > E1 (a) .

An electrical charged particle with a spin angular momentum will have a magnetization proportional to the spin angular momentum. Suppose the averaged expectation value of the magnetization of r r M = N Trace [ ρˆ (γ Sˆ ) ] . (a) the medium considered in Problem 11-1 above is The three Cartesian components of the magnetization in terms of the appropriate density- matrix elements as in Problem 11-1 above are: Mz = N γh ( ρ11 − ρ22 ) 2 , My = i N γh (ρ12 − ρ 21 ) 2 , 11 - 1 Mx = (b) N γh (ρ12 + ρ 21 ) 2 .

Suppose the averaged expectation value of the magnetization of r r M = N Trace [ ρˆ (γ Sˆ ) ] . (a) the medium considered in Problem 11-1 above is The three Cartesian components of the magnetization in terms of the appropriate density- matrix elements as in Problem 11-1 above are: Mz = N γh ( ρ11 − ρ22 ) 2 , My = i N γh (ρ12 − ρ 21 ) 2 , 11 - 1 Mx = (b) N γh (ρ12 + ρ 21 ) 2 . 16), the dynamic equations describing the precession of the magnetization r M around such a magnetic field are: d i (ρ11 − ρ22 ) = − 2 [H12 ρ 21 − ρ12 H21] = γ [i H x (−ρ12 + ρ21)+ H y ( ρ12 + ρ 21)] dt h , which can be shown to be [ r r d M z = γ [−H x M y + H y M x ] = γ M × H dt ] , z making use of the results in (a) above.

Download PDF sample

Rated 4.47 of 5 – based on 31 votes