Decoherence, fluctuations and Wigner function in neutron optics
نویسندگان
چکیده
منابع مشابه
Wigner Function and Decoherence
I briefly review the role of the Wigner function in the study of the quantum-to-classical transition through interaction with the environment (decoherence). My contribution to the Fifth Wigner Symposium in Vienna touches upon two of Wigner’s fields of interest: His work on the interpretation of quantum theory [1] and his discussion of quasi-probability functions as encoded in the famous Wigner ...
متن کاملua nt - p h / 02 10 08 8 v 1 1 1 O ct 2 00 2 Decoherence , fluctuations and Wigner function in neutron optics
Abstract. We analyze the coherence properties of neutron wave packets, after they have interacted with a phase shifter undergoing different kinds of statistical fluctuations. We give a quantitative (and operational) definition of decoherence and compare it to the standard deviation of the distribution of the phase shifts. We find that in some cases the neutron ensemble is more coherent, even th...
متن کاملDecoherence effects in the Wigner function formalism
We demonstrate the ability of the phase space formulation of quantum mechanics to provide convenient means and intuitive notions for exploring the process of transition from a quantum to a classical state known as decoherence. The Wigner equation, which is usually relevant for electron transport in nanostructures, augmented by the Boltzmann scattering operator is now applied to the time depende...
متن کاملSemiclassical Wigner Function and Geometrical Optics
We consider the problem of high-frequency asymptotics for the time-dependent onedimensional Schrödinger equation with rapidly oscillating initial data. This problem is commonly studied via the WKB method. An alternative method is based on the limit Wigner measure. This approach recovers geometrical optics, but, like the WKB method, it fails at caustics. To remedy this deficiency we employ the s...
متن کاملWigner Centennial: His Function, and Its Environmental Decoherence
In 1983, Wigner outlined a modified Schrödinger—von-Neumann equation of motion for macroobjects, to describe their typical coupling to the environment. This equation has become a principal model of environmental decoherence which is beleived responsible for the emergence of classicality in macroscopic quantum systems. Typically, this happens gradually and asymptotically after a certain characte...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Optics B: Quantum and Semiclassical Optics
سال: 2003
ISSN: 1464-4266,1741-3575
DOI: 10.1088/1464-4266/5/3/360