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Article
Open AccessExtremely large Lamb shift in a deep-strongly coupled circuit QED system with a multimode resonator
We report experimental and theoretical results on the extremely large Lamb shift in a multimode circuit quantum electrodynamics (QED) system in the deep-strong coupling (DSC) regime, where the qubit-resonator ...
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Article
Open AccessEnhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
Improving the coherence of superconducting qubits is a fundamental step towards the realization of fault-tolerant quantum computation. However, coherence times of quantum circuits made from conventional alumin...
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Chapter and Conference Paper
Emerging Ultrastrong Coupling Between Light and Matter Observed in Circuit Quantum Electrodynamics
The strength of the coupling between an atom and a single electromagnetic field mode is defined as the ratio of the vacuum Rabi frequency to the Larmor frequency, and is determined by a small dimensionless phy...
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Article
Open Accessπ phase shifter based on NbN-based ferromagnetic Josephson junction on a silicon substrate
In the field of superconducting electronics, a π phase shifter based on a ferromagnetic Josephson junction is expected to provide various advantages to classical and quantum superconducting devices. Here we re...
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Article
Open AccessCorrection: Publisher Correction: Observation of dark states in a superconductor diamond quantum hybrid system
Nature Communications 5: Article number: 3524 (2014); Published 8 April 2014; Updated 29 March 2018 The original HTML version of this Article had an incorrect article number of 3424; it should have been 3524. ...
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Article
Open AccessEfficient Single-Photon Coupling from a Nitrogen-Vacancy Center Embedded in a Diamond Nanowire Utilizing an Optical Nanofiber
Nitrogen-Vacancy (NV) centers in diamond are promising solid-state quantum emitters that can be utilized for photonic quantum applications. Various diamond nanophotonic devices have been fabricated for efficie...
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Article
Superconducting qubit–oscillator circuit beyond the ultrastrong-coupling regime
A circuit that pairs a flux qubit with an LC oscillator via Josephson junctions pushes the coupling between light to matter to uncharted territory, with the potential for new applications in quantum technologies.
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Book
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Chapter
Superconductor-Diamond Hybrid Quantum System
This chapter describes recent progress on research into superconducting flux qubit, NV diamond, and superconductor-diamond hybrid quantum systems. First, we describe important physical properties of supercondu...
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Article
Open AccessObservation of dark states in a superconductor diamond quantum hybrid system
The hybridization of distinct quantum systems has opened new avenues to exploit the best properties of these individual systems. Superconducting circuits and electron spin ensembles are one such example. Stron...
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Article
Coherent coupling of a superconducting flux qubit to an electron spin ensemble in diamond
Hybrid quantum devices, in which a superconducting qubit is coupled to a dedicated quantum memory based on natural atomic or molecular ensembles, are promising for quantum information processing. However, it h...
