Generation of Entangled Coherent States in Circuit-QED |
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Authors: | Qin-Qin Wu and Lan Xu |
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Institution: | (1) Center for Quantum Computer Technology School of Physical Sciences, The University of Queensland, 4072 St. Lucia, QLD, Australia |
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Abstract: | We study theoretically the generation of entangled states of microwaves in a circuit quantum electrodynamics (QED) system.
Our system includes a transmission-line resonator and a Cooper-pair box which acts as an artificial atom. It is shown that
in the dispersive regime of the circuit-QED system, a cross-Kerr interaction can be obtained by properly preparing the initial
state of the qubit. Based on this cross-Kerr interaction, we show that the coherent coupling of the two lowest-lying cavity
modes through the qubit can generate a macroscopic entangled state. |
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Keywords: | |
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