Certainty relations between local and nonlocal observables

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Local measurements of nonlocal observables and the relativistic reduction process

In this paper we reconsider the constraints which are imposed by relativistic requirements to any model of dynamical reduction. We review the debate on the subject and we call attention on the fundamental contributions by Aharonov and Albert. Having done this we present a new formulation, which is much simpler and more apt for our analysis, of the proposal put forward by these authors to perfor...

متن کامل

Complementarity between local and nonlocal topological effects

In certain topological effects the accumulation of a quantum phase shift is accompanied by a local observable effect. We show that such effects manifest a complementarity between nonlocal and local attributes of the topology, which is reminiscent but different from the usual wave-particle complementarity. This complementarity is not a consequence of noncommutativity, rather it is due to the non...

متن کامل

Relations between Observables and the Infrared Fixed-Point in QCD

We investigate the possibility that αs freezes as function of Nf within perturbation theory. We use two approaches – direct search for a zero in the effective-charge (ECH) β function, and the Banks-Zaks (BZ) expansion. We emphasize the fundamental difference between quantities with space-like vs. those with time-like momentum. We show that within the ECH approach several space-like quantities e...

متن کامل

New high order relations between physical observables in perturbative QCD

We exploit the fact that within massless perturbative QCD the same Green’s function determines the hadronic contribution to the τ decay width and the moments of the ee cross section. This allows to obtain relations between physical observables in the two processes up to an unprecedented high order of perturbative QCD. An precision measurement of the τ decay width allows one then to predict the ...

متن کامل

Gravitational observables and local symmetries.

Using a recent classification of local symmetries of the vacuum Einstein equations, it is shown that there can be no observables for the vacuum gravitational field (in a closed universe) built as spatial integrals of local functions of Cauchy data and their derivatives.

متن کامل

ذخیره 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: New Journal of Physics

سال: 2005

ISSN: 1367-2630

DOI: 10.1088/1367-2630/7/1/256