Driving SQUID qubit dynamics via lossy cavity fields
Abstract:
In this work we theoretically analyze the possibility of controlling
the dynamics of flux qubits via their coupling with a lossy cavity field.
Due to the presence of counter-rotating terms in the qubits-field mode
interaction Hamiltonian, we simplify the difficult problem of finding the
solution of the system master equation in its infinite dimensional Hilbert
space by a truncation procedure, physically meaningful, which confine our
analysis in a finite Hilbert space. This theoretical analysis demonstrate
the possibility of generating maximally entangled states of two spatially
separated qubits via their sequential interaction with the lossy field
mode, confirming once more the usefulness of quantized electromagnetic
field as tools both for the manipulation of the qubit state and the
coherent control of its dynamics.