Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum computation with Josephson-qubits by using a current-biased
  information bus   We propose an effective scheme for manipulating quantum information stored in
a superconducting nanocircuit. The Josephson qubits are coupled via their
separate interactions with an information bus, a large current-biased Josephson
junction treated as an oscillator with adjustable frequency. The bus is
sequentially coupled to only one qubit at a time. Distant Josephson qubits
without any direct interaction can be indirectly coupled with each other by
independently interacting with the bus sequentially, via exciting/de-exciting
vibrational quanta in the bus. This is a superconducting analog of the
successful ion trap experiments on quantum computing. Our approach differs from
previous schemes that simultaneously coupled two qubits to the bus, as opposed
to their sequential coupling considered here. The significant quantum logic
gates can be realized by using these tunable and selective couplings. The
decoherence properties of the proposed quantum system are analyzed within the
Bloch-Redfield formalism. Numerical estimations of certain important
experimental parameters are provided.

15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con