Quantum control of a single magnon in a macroscopic spin system
- URL: http://arxiv.org/abs/2211.06644v3
- Date: Tue, 16 May 2023 02:48:36 GMT
- Title: Quantum control of a single magnon in a macroscopic spin system
- Authors: Da Xu, Xu-Ke Gu, He-Kang Li, Yuan-Chao Weng, Yi-Pu Wang, Jie Li, H.
Wang, Shi-Yao Zhu, J. Q. You
- Abstract summary: We generate non-classical quantum states in a macroscopic spin system using tuning the qubit frequency it in situ via the Autler-Townes effect.
We confirm the deterministic generation of these non-classical states by Wigner tomography.
Our experiment offers the first reported deterministic generation of the non-classical quantum states in a macroscopic spin system.
- Score: 13.325952805096412
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Non-classical quantum states are the pivotal features of a quantum system
that differs from its classical counterpart. However, the generation and
coherent control of quantum states in a macroscopic spin system remain an
outstanding challenge. Here we experimentally demonstrate the quantum control
of a single magnon in a macroscopic spin system (i.e., 1~mm-diameter
yttrium-iron-garnet sphere) coupled to a superconducting qubit via a microwave
cavity. By tuning the qubit frequency {\it in situ} via the Autler-Townes
effect, we manipulate this single magnon to generate its non-classical quantum
states, including the single-magnon state and the superposition state of a
single magnon and vacuum. Moreover, we confirm the deterministic generation of
these non-classical states by Wigner tomography. Our experiment offers the
first reported deterministic generation of the non-classical quantum states in
a macroscopic spin system and paves a way to explore its promising applications
in quantum engineering.
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