Unitary and efficient spin squeezing in cavity optomechanics
- URL: http://arxiv.org/abs/2401.15553v1
- Date: Sun, 28 Jan 2024 03:19:26 GMT
- Title: Unitary and efficient spin squeezing in cavity optomechanics
- Authors: Lei Xie, Zhiqi Yan, Lingxia Wang, Di Wang, Jinfeng Liu, Yiling Song,
Wei Xiong, Mingfeng Wang
- Abstract summary: We propose an approach to produce spin squeezed states of a large number of nitrogen-vacancy centers in diamond nanostructures coupled to an optical cavity.
We found that, under certain conditions, our method has the potential to enhance the spin-spin nonlinear interactions.
Taking into account the noise effects of spin dephasing and relaxtion, we found that the proposed approaches are robust against imperfections.
- Score: 12.2314512523428
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We propose an approach to produce spin squeezed states of a large number of
nitrogen-vacancy centers in diamond nanostructures coupled to an optical
cavity. Unlike the previous squeezing method proposed by Bennett et al. [Phys.
Rev. Lett. 110, 156402 (2013)], which is limited by phonon number fluctuations
due to the existence of phonon-spin entanglement, our proposal can completely
erase the entanglement between spins and hybrid phonon-photon mode mediating
the effective spin-spin interaction, and thus achieves unitary
one-axis-twisting interactions between nitrogen-vacancy centres, yielding a
squeezing scaling $J^{-2/3}$, where J is the total angular momentum. We found
that, under certain conditions, our method has the potential to enhance the
spin-spin nonlinear interactions. We also proposed a scheme utilizing
repeatedly applying the one-axis-twisting evolution to two orthogonal spin
directions, which enables the transformation of the one-axis-twisting
interactions into two-axis-twisting type, and therefore leads to the spin
squeezing with Heisenberg-limited scaling $J^{-1}$. Taking into account the
noise effects of spin dephasing and relaxtion, we found that the proposed
approaches are robust against imperfections.
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