Junctions computer models

Other early designs of classical reversible computers included Landauer s Bag and Pipes Model [land82a] (in which pipes are used as classical mechanical conduits of information carried by balls). Brownian motion reversible computers ([benn88], [keyesTO]) and Likharev s model based on the Josephson junction [lik82]. One crucial drawback to these models (aside from their impracticality), however, is that they are all decidedly macroscopic. If we are to probe the microscopic limits of computation, we must inevitably deal with quantum phenomena and look for a quantum mechanical reversible computer. 

P 24] Computer simulations were carried out using the software Fluent 6 [68], A 3-D solid model of the T-channel micro mixer was built and named in Gambit The simulations were made solely for the zone of the T-junction, since for all other zones, including the downstream section of the mixing channel, laminar flow was assumed. Thus, a fine mesh of 173 000 brick elements could be used for the solid model. 

Figure 5. v(t) — t (amplitude as a junction of time) and v(t) — 8(%) (phase-plane) diagrams of the coherent oscillation model (Model 2) with F0 == 0 = A. The computer plot shows a typical limit cycle oscillation. 

In the previous section we briefly described the ab initio QC methods and the problems arising when they are applied to the modeling of complex systems. These problems cannot be considered as merely technical ones even if the computer power is sufficient and the required solution of the many electron problem can be obtained by brute force, the problem of the status of the result produced by the uncertainty introduced by poorly defined junction between the quantum and classical regions may still be important. Pragmatically, however, the resource requirements may have already... 

The simulation model was coupled with optimization (by using a similar algorithm as described in Figure 4.12) to compute an annealing temperature profile that minimized the junction depth while maintaining a desirable level of boron activation [170]. This analysis indicated that manipulating the rapid thermal annealing profile by itself is not able to simultaneously increase electrical activation and reduce junction depths to levels desired by industry. This limited actuation available at... 

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