Magnon blockade in magnon-qubit systems
- URL: http://arxiv.org/abs/2303.13823v2
- Date: Thu, 2 Nov 2023 08:05:22 GMT
- Title: Magnon blockade in magnon-qubit systems
- Authors: Zhu-yao Jin and Jun Jing
- Abstract summary: A hybrid system by the direct interaction between a magnon mode and a superconducting transmon qubit is used to realize a high-degree blockade for magnon.
It is a fundamental way toward quantum manipulation the level of a single magnon and preparation of single magnon sources.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: A hybrid system established by the direct interaction between a magnon mode
and a superconducting transmon qubit is used to realize a high-degree blockade
for magnon. It is a fundamental way toward quantum manipulation at the level of
a single magnon and preparation of single magnon sources. Through weakly
driving the magnon and probing the qubit, our magnon-blockade proposal can be
optimized when the transversal coupling strength between the magnon and qubit
is equivalent to the detuning of the qubit and the probing field or that of the
magnon and the driving field. Under this condition, the equal-time second-order
correlation function $g^{(2)}(0)$ can be analytically minimized when the
probing intensity is about three times the driving intensity. Moreover, the
magnon blockade could be further enhanced by proper driving intensity and
system decay rate, whose magnitudes outrange the current systems of cavity QED
and cavity optomechanics. In particular, the correlation function achieves
$g^{(2)}(0)\sim10^{-7}$, about two orders lower than that for the photon
blockade in cavity optomechanics. Also, we discuss the effects on $g^{(2)}(0)$
from thermal noise and the extra longitudinal interaction between the magnon
and qubit. Our optimized conditions for blockade are found to persist in these
nonideal situations.
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