Hermann Hessling's research while affiliated with Deutsches Elektronen-Synchrotron and other places
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Publications (4)
A physical system should be in a local equilibrium if it cannot be distinguished from a global equilibrium by ``infinitesimally localized measurements''. This seems to be a natural characterization of local equilibrium, however the problem is to give a precise meaning to the qualitative phrase ``infinitesimally localized measurements''. A solution...
Under which conditions does a jet appear as a particle--like signal from the hidden realm of quarks and gluons? Motivated by this question jet clustering conditions are formulated, in order to characterize jet clustering algorithms, which can be used for a determination of particle--like jets. Jets are understood as particle--like, if they behave l...
A physical system is in local equilibrium if it cannot be distinguished from a global equilibrium by ``infinitesimally localized measurements''. This should be a natural characterization of local equilibrium, but the problem is to give a precise meaning to the qualitative phrase ``infinitesimally localized measurements''. A solution is suggested in...
According to Galilei “all bodies fall with the same speed”. How can the idea, upon which Einstein's explanation of this fact is founded, be transferred into quantum field theory? A formulation of a Quantum Equivalence Principle (QEP) is suggested here. It is applicable to linear quantum field theories but cannot be applied directly to interacting q...
Citations
... Many authors have proposed quantum equivalence principles of various sorts [9,8,39,26,33,28,10] that are quite different from the one given above (gen-erally these are still concerned with inertial motion of some sort). Interesting work on the conceptual role an appropriate (though undefined) quantum equivalence principle might play as a bridge from Quantum Field Theory to Quantum Gravity has been undertaken by Pipa et al. . ...
... First, from the thermodynamic point of view, the global thermal equilibration provides the conceptual and practical basis for the definition of a thermometer. In nanosystems out of equilibrium, the local equilibration of energy and particles has been taken by many authors as "local equilibrium condition" for determining the local temperature [81,[182][183][184][185]. However, in this review the above condition will be termed as "zero-current condition", since the latter more precisely describes the consequence of local equilibration processes -vanishing of particle and heat currents in a local subregion of a system. ...
Reference: Local Temperatures Out of Equilibrium
