Resonant Cavity Modes in Bi2Sr2CaCu2O8+x Intrinsic Josephson Junction Stacks

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Huili Zhang ◽  
Raphael Wieland ◽  
Wei Chen ◽  
Olcay Kizilaslan ◽  
Shigeyuki Ishida ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Resonant Cavity ◽  
Cavity Modes ◽  
Intrinsic Josephson Junction

scholarly journals Spectral measurements of THz radiation emitted from intrinsic Josephson junction stacks

2018 ◽  
Vol 195 ◽  
pp. 05013
Author(s):  
V.P. Koshelets ◽  
N.V. Kinev ◽  
A.B. Ermakov ◽  
F. Rudau ◽  
R. Wieland ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Thz Radiation ◽  
Spectral Measurements ◽  
Intrinsic Josephson Junction

scholarly journals Electron shelving of a superconducting artificial atom

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Nathanaël Cottet ◽  
Haonan Xiong ◽  
Long B. Nguyen ◽  
Yen-Hsiang Lin ◽  
Vladimir E. Manucharyan
Keyword(s):  
Quantum Electrodynamics ◽  
Optical Pumping ◽  
Radiative Lifetime ◽  
Resonant Cavity ◽  
Coherence Time ◽  
Fluorescence Signal ◽  
Circuit Quantum Electrodynamics ◽  
Artificial Atom ◽  
Cavity Modes ◽  
Quantum Technology

AbstractInterfacing long-lived qubits with propagating photons is a fundamental challenge in quantum technology. Cavity and circuit quantum electrodynamics (cQED) architectures rely on an off-resonant cavity, which blocks the qubit emission and enables a quantum non-demolition (QND) dispersive readout. However, no such buffer mode is necessary for controlling a large class of three-level systems that combine a metastable qubit transition with a bright cycling transition, using the electron shelving effect. Here we demonstrate shelving of a circuit atom, fluxonium, placed inside a microwave waveguide. With no cavity modes in the setup, the qubit coherence time exceeds 50 μs, and the cycling transition’s radiative lifetime is under 100 ns. By detecting a homodyne fluorescence signal from the cycling transition, we implement a QND readout of the qubit and account for readout errors using a minimal optical pumping model. Our result establishes a resource-efficient (cavityless) alternative to cQED for controlling superconducting qubits.

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