Quantum control and quantum measurement in solid state qubits (original) (raw)

In the past two decades significant theoretical and experimental efforts have been devoted to the study and development of mesoscopic devices, that exploit quantum coherence at the nanoscale. Quantum computing represents an emerging promising field of science and technology and is currently subject of extensive investigation. One of the fundamental issues, that still represents a major obstacle to the realization of a quantum computer, is certainly decoherence. The interaction of a quantum system with the external environment is what ultimately limits the efficiency of a quantum device. On the other hand, in order to perform precise tasks and implement quantum algorithms, it is necessary to address the quantum devices from the lab. It is therefore desirable to achieve full control and to minimize the detrimental residual interaction. Control protocols and read out schemes are still performed on a basic level and many aspects of the communication between the quantum systems and the external environment need still to be investigated from a fundamental point of view.