Direct Wigner Tomography of a Superconducting Anharmonic Oscillator

被引:41
|
作者
Shalibo, Yoni [1 ]
Resh, Roy [1 ]
Fogel, Ofer [1 ]
Shwa, David [1 ]
Bialczak, Radoslaw [2 ]
Martinis, John M. [2 ]
Katz, Nadav [1 ]
机构
[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel
[2] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA
关键词
ENTANGLEMENT; STATE;
D O I
10.1103/PhysRevLett.110.100404
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The analysis of wave-packet dynamics may be greatly simplified when viewed in phase space. While harmonic oscillators are often used as a convenient platform to study wave packets, arbitrary state preparation in these systems is more challenging. Here, we demonstrate a direct measurement of the Wigner distribution of complex photon states in an anharmonic oscillator-a superconducting phase circuit, biased in the small anharmonicity regime. We apply our method on nondispersive wave packets to explicitly show phase locking in states prepared by a frequency chirp. This method requires a simple calibration, and is easily applicable in our system out to the fifth level. DOI: 10.1103/PhysRevLett.110.100404
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页数:5
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