By Günther Ludwig
In the 1st quantity we dependent quantum mechanics at the goal description of macroscopic units. The additional improvement of the quantum mechanics of atoms, molecules, and collision approaches has been defined in . during this context additionally the standard description of composite structures through tensor items of Hilbert areas has been brought. this system may be officially extrapolated to platforms composed of "many" ele mentary platforms, even arbitrarily many. One previously had the opinion that this "extrapolated quantum mechanics" is a extra entire conception than the objec tive description of macrosystems, an opinion which generated unsurmountable diffi culties for explaining the measuring method. With recognize to our starting place of quan tum mechanics on macroscopic objectivity, this opinion may suggest that our founda tion is not any starting place in any respect. the duty of this moment quantity is to achieve a compatibility among the target description of macrosystems and an extrapolated quantum mechanics. hence in X we identify the "statistical mechanics" of macrosystems as a idea extra compre hensive than an extrapolated quantum mechanics. in this foundation we remedy the matter of the measuring procedure in quantum mechan ics, in XI constructing a idea which describes the measuring method as an interplay among microsystems and a macroscopic equipment. This concept additionally permits to calculate "in precept" the observable measured through a tool. Neither an incorporation of realization nor a mysterious mind's eye comparable to "collapsing" wave packets are necessary.
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Extra info for An Axiomatic Basis for Quantum Mechanics: Volume 2 Quantum Mechanics and Macrosystems
K(E') is defined by
From y=1/2(ji+M)+1/2(ji-M) follows s'r'y=s'r'(J+ =ts'r'(y+8(J)+ts'r'(ji-8(J). Since s'r'(J+E8 e L, we must have s'r'(ji+8(J)=s'r'(J+ = s' r' y and hence s' r' (J = 0, in contradiction to (J ~ o. L(L')~L(Lm) bijective implies BiJm(L~~BiJ(r) injective and rsBiJm(Lm) dense in BiJ'(L'). From s'r'L(L') = L(L m) also follows that the mapping BiJm(Lm)~BiJ(L') preserves the norm; therefore, BiJm(L~~BiJ(r) is an isomorphism of Banach spaces. Hence we can identify BiJm(Lm) with BiJ(L') in the following way.
1. 12) can also be said to state the possibility to "continually measure" the trajectories. 2). 6 (for most of the deductions). 12) cannot be fulfilled (hence only" la '''m(4)) dense in L(t)" is possible). 1). bo(U). t;o E m =0 e L(Em) is a bijective mapping. bo. 13). As observables in [l)'~exp, these Fb o in general need not coexist. 2, F/;o is the restriction of S/;o. 15) for all YE~'(I'm) and for all wEK m, and hence SboIKm=j. ). 12) is therefore equivalent to the statement that the mapping j can be extended to all of K as a mixture-morphism.