[Naoki Yamamoto] Quantum functionalization via feedback amplification

Research Director

Naoki Yamamoto

Naoki Yamamoto

Faculty of Science and Technology, Keio University
Associate Professor
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Outline

Feedback control of an amplifier, particularly an operational amplifier, enables realizing a large variety of useful functions in almost all current technological systems. The ultimate goal of this research is to extend this classical methodology to quantum domain and develop a general theory for designing various quantum-mechanical functions, which would bring drastic improvement or novel applications in quantum information science. For example, quantum active filters and quantum differentiator/integrator will be available by properly synthesizing a quantum feedback amplification architecture, and those new functions will enable realizing a high-precision detector for superconducting quantum bits and a novel quantum analogue-digital transducer.

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