Manipulating the quantum state of an electrical circuit.

نویسندگان

  • D Vion
  • A Aassime
  • A Cottet
  • P Joyez
  • H Pothier
  • C Urbina
  • D Esteve
  • M H Devoret
چکیده

We have designed and operated a superconducting tunnel junction circuit that behaves as a two-level atom: the "quantronium." An arbitrary evolution of its quantum state can be programmed with a series of microwave pulses, and a projective measurement of the state can be performed by a pulsed readout subcircuit. The measured quality factor of quantum coherence Qphi approximately 25,000 is sufficiently high that a solid-state quantum processor based on this type of circuit can be envisioned.

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عنوان ژورنال:
  • Science

دوره 296 5569  شماره 

صفحات  -

تاریخ انتشار 2002