Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Information contents and architectural requirements of observer "ready"
  states   A functional analysis of the task of observing multiple macroscopic quantum
systems over an extended period of time and then reporting the accumulated
results is used to investigate the information that must be encoded in the
"ready" state |O^r> of any finite, macroscopic observer O capable of performing
this task. Decoherence considerations show that this task can be considered as
involving local observations under classical conditions (LOCC), allowing the
use of classical automata theory to define a minimal observer. It is shown that
such a minimal observer must implement a functional architecture equivalent to
a classical Turing machine and must encode in |O^r> a classical specification
of the complete set of reportable apparatus states. The observation task is
then re-characterized employing an explicit model of such a minimal observer,
and it is shown that both the assumption that external systems have
well-defined boundaries against the environment and the assumption of
decoherence are unnecessary for the characterization of measurements made by a
minimal observer. It is shown that the observables available to a minimal
observer are positive operator-valued measures (POVMs) and that the measurement
results reported by a minimal observer comply with the Born rule. The
differences in underlying physical assumptions between this "systems-free"
treatment of observation and that traditionally employed in analyses of quantum
measurement and quantum communication are discussed.

16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom