Direct measurement of the quantum state of the electromagnetic field in a superconducting transmission line
arXiv:quant-ph/0602195 · doi:10.1103/PhysRevA.73.030303
Abstract
We propose an experimental procedure to directly measure the state of an electromagnetic field inside a resonator, corresponding to a superconducting transmission line, coupled to a Cooper-pair box (CPB). The measurement protocol is based on the use of a dispersive interaction between the field and the CPB, and the coupling to an external classical field that is tuned to resonance with either the field or the CPB. We present a numerical simulation that demonstrates the feasibility of this protocol, which is within reach of present technology.
arXiv commentAccepted for publication in Physical Review A (Rapid Communication). 4 pages, 2 figures
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