The full potential of a new type of microwave amplifier as a powerful resource for quantum information processing
The full potential of a new type of microwave amplifier as a powerful resource for quantum information processing
"Squeezing and quantum state engineering with Josephson travelling wave amplifiers" in Nature Partner Journals Quantum Information
The quantum information research group led by Alexandre Blais from the Institut quantique show the full potential of a new type of microwave amplifier as a powerful resource for quantum information processing.
The Josephson Travelling Wave Parametric Amplifier (JTWPA) is a new quantum electronic device, known to be able to amplify extremely weak quantum signals, with a sensitivity close to the limit allowed by quantum mechanics. The article results show that it is much more than just an amplifier: one can use it to generate entangled microwave radiation with great flexibility in tailoring the properties and entanglement structure of the radiation. In particular, by carefully interfering the output of multiple JTPWA devices, it is possible to generate just the type of entanglement necessary for universal quantum computation.
“Our work shows that the recently developed JTWPA device is a very powerful resource for quantum engineering and computation. Most strikingly, it can be used for universal quantum computation, which means that our proposal may lead to small-scale quantum computers using already existing technology.” explained Arne Grimsmo, postdoc in Alexandre Blais’ group and first author of the article. “Moreover, the power to perform universal quantum computation also suggests that the JTWPA can find many other applications in quantum technology and specialized quantum information processing tasks. We show that the JTWPA is likely to be a potent resource in a range of areas, including quantum enhanced sensing and measurements, qubit control and readout, as well as more fundamental studies of the interplay of light and matter in structured non-linear media.”
Link to the article in Nature