X-Message-Number: 9594 Date: Sat, 2 May 1998 13:37:46 -0400 From: Bozzonetti <> Subject: Quantum robots There is an abstract from the Quantum physics server at Los Alamos: \\ Paper: quant-ph/9802067 From: (Paul Benioff - 630-252-3218) Date: Thu, 26 Feb 1998 19:44:43 GMT (32kb) Title: Quantum Robots and Environments Authors: Paul Benioff(Argonne National Laboratory) Comments: 30 Latex pages, 3 Postscript figures, submitted to Phys Rev A \\ Quantum robots and their interactions with environments of quantum systems are described and their study justified. A quantum robot is a mobile quantum system that includes a quantum computer and needed ancillary systems on board. Quantum robots carry out tasks whose goals include specified changes in the state of the environment or carrying out measurements on the environment. Each task is a sequence of alternating computation and action phases. Computation phase activities include determination of the action to be carried out in the next phase and possible recording of information on neighborhood environmental system states. Action phase activities include motion of the quantum robot and changes of neighborhood environment system states. Models of quantum robots and their interactions with environments are described using discrete space and time. To each task is associated a unitary step operator T that gives the single time step dynamics. T =3D T_{a}+T_{c} is a sum of action phase and computation phase step operators. Conditions that T_{a} and T_{c} should satisfy are given along with a description of the evolution as a sum over paths of completed phase input and output states. A simple example of a task carrying out a measurement on a very simple environment is analyzed. A decision tree for the task is presented and discussed in terms of sums over phase paths. One sees that no definite times or durations are associated with the phase steps in the tree and that the tree describes the successive phase steps in each path in the sum. \\ I think this may prove interesting for nanothch amateurs. You can get the paper by sending the request: get 9802067 in the subject line at: Y. Bozzonetti. Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=9594