|
|
Subscribers:
to view the full text of a paper, click on the title of the paper. If you
have any problem to access the full text, please check with your librarian
or contact
[email protected]
To subscribe to QIC, please click
Here.
Quantum
Information and Computation
ISSN: 1533-7146
published since 2001
|
Vol.2 No.1, January 2002 |
On the
classical character of control fields in quantum information processing
(pp1-13)
S.J. van Enk and H.J. Kimble
doi:
https://doi.org/10.26421/QIC2.1-1
Abstracts:
Control fields in quantum information processing are
almost by definition assumed to be classical. In reality, however, when
such a field is used to manipulate the quantum state of qubits, the
qubits always become slightly entangled with the field. For quantum
information processing this is an undesirable property, as it precludes
perfect quantum computing and quantum communication. Here we consider
the interaction of atomic qubits with laser fields and quantify
atom-field entanglement in various cases of interest. We find that the
entanglement decreases with the average number of photons \bar{n} in a
laser beam as $E\propto\log_2 \bar{n}/\bar{n}$ for $\bar{n}\rightarrow\infty$.
Key words: quantum
information processing, entanglement |
�� |