Confining the state of light to a quantum manifold by engineered two-photon loss

被引：429

作者：

Leghtas, Z. ^{[1
]}

Touzard, S. ^{[1
]}

Pop, I. M. ^{[1
]}

Kou, A. ^{[1
]}

Vlastakis, B. ^{[1
]}

Petrenko, A. ^{[1
]}

Sliwa, K. M. ^{[1
]}

Narla, A. ^{[1
]}

Shankar, S. ^{[1
]}

Hatridge, M. J. ^{[1
]}

Reagor, M. ^{[1
]}

Frunzio, L. ^{[1
]}

Schoelkopf, R. J. ^{[1
]}

Mirrahimi, M. ^{[1
,2
]}

Devoret, M. H. ^{[1
]}

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] Inst Natl Rech Informat & Automat INRIA Paris Roc, F-78153 Le Chesnay, France

来源：

SCIENCE | 2015年 / 347卷 / 6224期

关键词：

SINGLE-PHOTON; NOISE;

D O I：

10.1126/science.aaa2085

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Physical systems usually exhibit quantum behavior, such as superpositions and entanglement, only when they are sufficiently decoupled from a lossy environment. Paradoxically, a specially engineered interaction with the environment can become a resource for the generation and protection of quantum states. This notion can be generalized to the confinement of a system into a manifold of quantum states, consisting of all coherent superpositions of multiple stable steady states. We have confined the state of a superconducting resonator to the quantum manifold spanned by two coherent states of opposite phases and have observed a Schrodinger cat state spontaneously squeeze out of vacuum before decaying into a classical mixture. This experiment points toward robustly encoding quantum information inmultidimensional steady-state manifolds.

引用

页码：853 / 857

页数：5

共 28 条

[1] Persistent Control of a Superconducting Qubit by Stroboscopic Measurement Feedback [J].