scholarly journals Quantum walks on circles in phase space via superconducting circuit quantum electrodynamics

2008 ◽  
Vol 78 (4) ◽  
Author(s):  
Peng Xue ◽  
Barry C. Sanders ◽  
Alexandre Blais ◽  
Kevin Lalumière
Keyword(s):  
Phase Space ◽  
Quantum Electrodynamics ◽  
Quantum Walks ◽  
Circuit Quantum Electrodynamics ◽  
Superconducting Circuit

scholarly journals Ultrawide-range photon number calibration using a hybrid system combining nano-electromechanics and superconducting circuit quantum electrodynamics

2018 ◽  
Vol 113 (15) ◽  
pp. 152601 ◽  
Author(s):  
Philip Schmidt ◽  
Daniel Schwienbacher ◽  
Matthias Pernpeintner ◽  
Friedrich Wulschner ◽  
Frank Deppe ◽  
...  
Keyword(s):  
Hybrid System ◽  
Quantum Electrodynamics ◽  
Photon Number ◽  
Circuit Quantum Electrodynamics ◽  
Superconducting Circuit

scholarly journals Two-resonator circuit quantum electrodynamics: Dissipative theory

2010 ◽  
Vol 81 (14) ◽  
Author(s):  
Georg M. Reuther ◽  
David Zueco ◽  
Frank Deppe ◽  
Elisabeth Hoffmann ◽  
Edwin P. Menzel ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Circuit Quantum Electrodynamics

scholarly journals Efficient transfer of an arbitrary qutrit state in circuit quantum electrodynamics

2015 ◽  
Vol 40 (23) ◽  
pp. 5602 ◽  
Author(s):  
Tong Liu ◽  
Shao-Jie Xiong ◽  
Xiao-Zhi Cao ◽  
Qi-Ping Su ◽  
Chui-Ping Yang
Keyword(s):  
Quantum Electrodynamics ◽  
Circuit Quantum Electrodynamics ◽  
Efficient Transfer

scholarly journals Critical slowing down in circuit quantum electrodynamics

2021 ◽  
Vol 7 (21) ◽  
pp. eabe9492
Author(s):  
Paul Brookes ◽  
Giovanna Tancredi ◽  
Andrew D. Patterson ◽  
Joseph Rahamim ◽  
Martina Esposito ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Quantum Circuit ◽  
Critical Slowing Down ◽  
Microwave Cavity ◽  
Many Body ◽  
Circuit Quantum Electrodynamics ◽  
Slowing Down ◽  
The Rich ◽  
First Order Phase ◽  
Shed Light

Critical slowing down of the time it takes a system to reach equilibrium is a key signature of bistability in dissipative first-order phase transitions. Understanding and characterizing this process can shed light on the underlying many-body dynamics that occur close to such a transition. Here, we explore the rich quantum activation dynamics and the appearance of critical slowing down in an engineered superconducting quantum circuit. Specifically, we investigate the intermediate bistable regime of the generalized Jaynes-Cummings Hamiltonian (GJC), realized by a circuit quantum electrodynamics (cQED) system consisting of a transmon qubit coupled to a microwave cavity. We find a previously unidentified regime of quantum activation in which the critical slowing down reaches saturation and, by comparing our experimental results with a range of models, we shed light on the fundamental role played by the qubit in this regime.

scholarly journals Cutoff-Free Circuit Quantum Electrodynamics

2017 ◽  
Vol 119 (7) ◽  
Author(s):  
Moein Malekakhlagh ◽  
Alexandru Petrescu ◽  
Hakan E. Türeci
Keyword(s):  
Quantum Electrodynamics ◽  
Circuit Quantum Electrodynamics

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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