Coherent controlization using superconducting qubits

Year
2015
Type(s)
Author(s)
Nicolai Friis, Alexey A. Melnikov, Gerhard Kirchmair, Hans J. Briegel
Source
Scientific Reports 5, 18036
Url(s)
https://doi.org/10.1038/srep18036

Coherent controlization, i.e., coherent conditioning of arbitrary single- or multi-qubit operations on the state of one or more control qubits, is an important ingredient for the flexible implementation of many algorithms in quantum computation. This is of particular significance when certain subroutines are changing over time or when they are frequently modified, such as in decision-making algorithms for learning agents. We propose a scheme to realize coherent controlization for any number of superconducting qubits coupled to a microwave resonator. For two and three qubits, we present an explicit construction that is of high relevance for quantum learning agents. We demonstrate the feasibility of our proposal, taking into account loss, dephasing, and the cavity self-Kerr effect.

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