Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-shot quantum measurement using a hysteretic DC-SQUID   We propose a single shot quantum measurement to determine the state of a
Josephson charge quantum bit (qubit). The qubit is a Cooper pair box (CPB) and
the measuring device is a two junction superconducting quantum interference
device (dc-SQUID). This coupled system exhibits a close analogy with a Rydberg
atom in a high Q cavity, except that in the present device we benefit from the
additional feature of escape from the supercurrent state by macroscopic quantum
tunneling, which provides the final read-out. We test the feasibility of our
idea against realistic experimental circuit parameters and by analyzing the
phase fluctuations of the qubit.

6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
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The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg