What is it about?

This paper discusses a method to enhance the performance of quantum devices, which often face issues such as reflections and noise during readout. The authors propose a strategy for quantum non-reciprocity, using qubits' nonlinearity and spatial symmetry disruption. This strategy changes Lorentz-type qubits into Fano-type ones, exhibiting an asymmetric spectral response. This transformation boosts isolation and doubles the spectral bandwidth. The study provides a foundation for creating better-performing quantum devices, offering broader bandwidth and improved noise protection.

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Why is it important?

This study is important because it presents a method to enhance the efficiency of quantum devices, which are central to quantum computing, communication, and sensing. The traditional solutions for reducing readout reflections and noise face limitations like restricted bandwidth and high losses. The proposed strategy overcomes these, significantly improving isolation and doubling the bandwidth. By enabling the creation of compact, high-performance quantum devices compatible with planar technologies, it could considerably advance the capabilities of quantum technologies.

Perspectives

This study represents a significant advancement in quantum technology by proposing a novel approach to improve the performance of quantum devices. Through strategic manipulation of qubits, the researchers enhanced isolation and doubled spectral bandwidth, potentially revolutionizing quantum computing, communication, and sensing. The approach's compatibility with planar technologies is particularly noteworthy, enabling integration with existing tech platforms. While the findings are supported by comprehensive quantum simulations and experiments, further research is required for validation and optimization. The work opens up a plethora of opportunities, highlighting the promise that quantum technology holds for the future.

Alex Krasnok
Florida International University

Read the Original

This page is a summary of: Fano-qubits for quantum devices with enhanced isolation and bandwidth, Applied Physics Letters, June 2023, American Institute of Physics,
DOI: 10.1063/5.0151047.
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