Spectrum of a superconducting phase qubit coupled to a microscopic two-level system

2014 ◽  
Vol 59 (29-30) ◽  
pp. 3835-3840 ◽  
Author(s):  
Zhican Du ◽  
Xueda Wen ◽  
Yu Zhou ◽  
Guozhu Sun ◽  
Jian Chen ◽  
...  
Keyword(s):  
Superconducting Phase ◽  
Level System ◽  
Phase Qubit

scholarly journals Quantum dynamics of a microwave driven superconducting phase qubit coupled to a two-level system

2010 ◽  
Vol 82 (13) ◽  
Author(s):  
Guozhu Sun ◽  
Xueda Wen ◽  
Bo Mao ◽  
Zhongyuan Zhou ◽  
Yang Yu ◽  
...  
Keyword(s):  
Quantum Dynamics ◽  
Superconducting Phase ◽  
Level System ◽  
Phase Qubit

scholarly journals Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Jianxin Shi
Keyword(s):  
Sudden Death ◽  
Quantum Dynamics ◽  
Coupling Effect ◽  
Superconducting Devices ◽  
Superconducting Phase ◽  
Level System ◽  
Superconducting Qubit ◽  
Driving Time ◽  
Initial States ◽  
Phase Qubit

Entanglement can exist not only in the microscopic system (e.g., atom, photon, and ion trap) but also in macroscopic systems. According to recent research, entanglement can be achieved and controlled in superconducting devices. The quantum dynamics and entanglement mechanism of the coupled superconducting phase qubit and a two-level system (TLS) were demonstrated when the bipartite system was under microwave driving. Besides, the results reveal that when the system was experiencing decoherence, entanglement (concurrence) of the coupled superconducting phase qubit and TLS would oscillate damply with microwave driving time, even exhibiting concurrence sudden death and revival. The coupling effect of the superconducting qubit and TLS system and the resonant microwave together help to achieve entanglement, while concurrence death and concurrence revival are dependent on the decoherence source and mechanism, for example, the resonant microwave driving time acting on the bipartite coupling system. Furthermore, the simulation results show the entanglement of the coupled qubit and TLS system also depends on the purity of the initial states of the system. The article carried out a numerical simulation on the entanglement of different initial states, and the results showed that the entanglement of the coupled system changes with different initial states. For different initial states, entanglement, sudden death, and rejuvenation are still visible.

scholarly journals Entanglement dynamics of a superconducting phase qubit coupled to a two-level system

2012 ◽  
Vol 86 (6) ◽  
Author(s):  
Guozhu Sun ◽  
Zhongyuan Zhou ◽  
Bo Mao ◽  
Xueda Wen ◽  
Peiheng Wu ◽  
...  
Keyword(s):  
Superconducting Phase ◽  
Entanglement Dynamics ◽  
Level System ◽  
Phase Qubit

scholarly journals Method for direct observation of coherent quantum oscillations in a superconducting phase qubit

2002 ◽  
Vol 66 (22) ◽  
Author(s):  
Ya. S. Greenberg ◽  
A. Izmalkov ◽  
M. Grajcar ◽  
E. Il’ichev ◽  
W. Krech ◽  
...  
Keyword(s):  
Direct Observation ◽  
Superconducting Phase ◽  
Quantum Oscillations ◽  
Phase Qubit ◽  
Coherent Quantum

scholarly journals rf-SQUID-Mediated Coherent Tunable Coupling between a Superconducting Phase Qubit and a Lumped-Element Resonator

2010 ◽  
Vol 104 (17) ◽  
Author(s):  
M. S. Allman ◽  
F. Altomare ◽  
J. D. Whittaker ◽  
K. Cicak ◽  
D. Li ◽  
...  
Keyword(s):  
Superconducting Phase ◽  
Lumped Element ◽  
Tunable Coupling ◽  
Phase Qubit ◽  
Rf Squid
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