Beyond the Standard ”marginalizations” of Wigner Function
نویسندگان
چکیده
We discuss the problem of finding ”marginal” distributions within different tomographic approaches to quantum state measurement, and we establish analytical connections among them. PACS number(s): 03.65.-w, 42.50.-p
منابع مشابه
The Quantum Statistical Mechanical Theory of Transport Processes
A new derivation of the quantum Boltzmann transport equation for the Fermion system from the quantum time evolution equation for the wigner distribution function is presented. The method exhibits the origin of the time - irreversibility of the Boltzmann equation. In the present work, the spin dependent and indistinguishibility of particles are also considered.
متن کاملPathologies cardiac discrimination using the Fast Fourir Transform (FFT) The short time Fourier transforms (STFT) and the Wigner distribution (WD)
This paper is concerned with a synthesis study of the fast Fourier transform (FFT), the short time Fourier transform (STFT and the Wigner distribution (WD) in analysing the phonocardiogram signal (PCG) or heart cardiac sounds. The FFT (Fast Fourier Transform) can provide a basic understanding of the frequency contents of the heart sounds. The STFT is obtained by calculating the Fourier tran...
متن کاملCrossing the threshold of Iranian TEFL
Teaching English in an Iranian and Islamic culture poses complex questions for both teachers and learners. In this paper, the authors intend to shed light on what it means to teach English as a foreign language (TEFL) in an Islamic-Iranian context. Having reviewed the colonial and postmodern views of English language teaching, the authors took a look beyond the current ...
متن کاملNeutrino production states in oscillation phenomena - are they pure or mix ?
General quantum mechanical state of neutrinos produced by mechanisms beyond the Standard Model is discussed. Only in the case of relativistic neutrinos and the Standard Model left-handed charge current interaction, neutrino state is pure and described by Maki-Nakagawa-Sakata-Pontecorvo unitary mixing matrix. The problem of Wigner spin rotation, caused by Lorentz transformation from the rest pro...
متن کاملQuantum tunneling in thermal medium Sh . Matsumoto 1 and M . Yoshimura 2 1 Theory Group , KEK Oho 1 - 1 Tsukuba Ibaraki 305 - 0801 Japan
Time evolution of tunneling phenomena in medium is studied using a standard model of environment interaction. A semiclassical formula valid at low, but finite temperatures is derived in the form of integral transform for the reduced Wigner function, and the tunneling probability in thermal medium is calculated for a general tunneling potential of one dimensional system. Effect of dissipation, i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008