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Quantum manipulations of charge-flux devices

We have investigated theoretically a number of quantum manipulations in charge-flux (quantronium) devices, namely how to create interaction-free measurements and how to couple two qubits. For the first topic, a sequence of pulses can be designed so that a quantronium device can assess the presence of one of them without absorbing any energy. For the second topic, we have shown that it is possible to produce entangled states and CNOT gates by irradiating the qubits with pulses of microwave radiation.

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UNIVERSITY OF JYVASKYLA
SURVONTIE 9
40014 JYVASKYLA
Finland
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