Schr\"{o}dinger cats growing up to 60 qubits and dancing in a cat scar
enforced discrete time crystal
- URL: http://arxiv.org/abs/2401.08284v1
- Date: Tue, 16 Jan 2024 11:18:09 GMT
- Title: Schr\"{o}dinger cats growing up to 60 qubits and dancing in a cat scar
enforced discrete time crystal
- Authors: Zehang Bao, Shibo Xu, Zixuan Song, Ke Wang, Liang Xiang, Zitian Zhu,
Jiachen Chen, Feitong Jin, Xuhao Zhu, Yu Gao, Yaozu Wu, Chuanyu Zhang, Ning
Wang, Yiren Zou, Ziqi Tan, Aosai Zhang, Zhengyi Cui, Fanhao Shen, Jiarun
Zhong, Tingting Li, Jinfeng Deng, Xu Zhang, Hang Dong, Pengfei Zhang,
Yang-Ren Liu, Liangtian Zhao, Jie Hao, Hekang Li, Zhen Wang, Chao Song,
Qiujiang Guo, Biao Huang, H. Wang
- Abstract summary: Greenberger-Horne-Zeilinger (GHZ) states, as maximally entangled Schr"odinger cat states, play vital roles in the foundations of quantum physics and technology.
We propose an efficient protocol suitable for two-dimensional quantum processors.
By employing sequences of high-fidelity quantum gates, we achieve genuine GHZ entanglement at the intermediate scale with up to 60 superconducting qubits.
- Score: 20.49846840977366
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Greenberger-Horne-Zeilinger (GHZ) states, as maximally entangled
Schr\"{o}dinger cat states, play vital roles in the foundations of quantum
physics and technology, but creating and preserving these fragile states pose
tremendous challenges. Discrete time crystals (DTCs), originally aimed at
exploring exotic nonequilibrium quantum matters, have raised significant
scientific interest, but whether this brilliant concept can lead to true
applications remains unclear. Here we propose an efficient protocol suitable
for two-dimensional quantum processors, and by employing sequences of
high-fidelity quantum gates, we achieve genuine GHZ entanglement at the
intermediate scale with up to 60 superconducting qubits. More importantly, we
take a new perspective on DTC by deterministically engineering pairwise cat
eigenstates as quantum many-body scars, which shield the GHZ states from
generic perturbations and enable dynamical switching during the state
evolution. Our results not only nail down a direct application of DTC, but also
establish engineerable many-body systems far from equilibrium as a versatile
platform to protect and steer fragile but intriguing quantum entanglement.
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