A n-qubit controlled phase gate with superconducting quantum interference devices coupled to a resonator

Details A n-qubit controlled phase gate with superconducting quantum interference devices coupled to a resonator A n-qubit controlled phase gate with superconducting quantum interference devices coupled to a resonator

2005-04-25

arxiv.org/abs/quant-ph/0504188v2

Physical Review A 72, 032311 (2005)

Physics

Quantum Physics

9 pages, 4 figures, 1 table, RevTeX, Resubmitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.72.032311

We present a way to realize a $n$-qubit controlled phase gate with superconducting quantum interference devices (SQUIDs) by coupling them to a superconducting resonator. In this proposal, the two logical states of a qubit are represented by the two lowest levels of a SQUID. An intermediate level of each SQUID is utilized to facilitate coherent control and manipulation of quantum states of the qubits. It is interesting to note that a $n$-qubit controlled phase gate can be achieved with $n$ SQUIDs by successively applying a $\pi /2$ Jaynes-Cummings pulse to each of the $n-1$ control SQUIDs before and after a $\pi$ Jaynes-Cummings pulse on the target SQUID.

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