Dissipative generation of steady-state entanglement of two separated SiV $$^{-}$$ - centers coupled to photonic cryst
- PDF / 544,357 Bytes
- 12 Pages / 439.37 x 666.142 pts Page_size
- 99 Downloads / 169 Views
Dissipative generation of steady-state entanglement of two separated SiV− centers coupled to photonic crystal cavities Xinke Li1 · Shengli Ma1 · Jikun Xie1 · Yalong Ren1 · Fuli Li1 Received: 7 April 2020 / Accepted: 1 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract We propose an efficient scheme for the dissipative generation of steady-state entanglement of two negatively charged silicon-vacancy (SiV − ) centers, which are coupled to two separated photonic crystal cavities, respectively. With the external driving fields to tailor the desired interaction between the Zeeman-split lower orbital branches of the ground states of the SiV− centers and the cavity fields, we show that the heavily damped cavities can induce an effective quantum reservoir coupled to the two SiV− centers. Based on a form of quantum reservoir engineering, the two SiV− centers can be cooled down to an entangled state at stationary state. Our scheme has the distinct feature that the decay of the cavities as resource is utilized for producing the steady-state entanglement, which does not need to exactly prepare the initial state of the system. The present work may open up promising perspectives for realizing quantum networks and quantum information processing with solid-state SiV− centers in nanophotonic structures. Keywords SiV− centers · Photonic crystal cavities · Entanglement · Quantum reservoir engineering
1 Introduction Cavity quantum electrodynamics (QED) provides an ideal platform for the fundamental study of light-matter interactions [1]. Photons are confined into a cavity with small mode volume and high quality factor, which enables strong interactions with one or more atoms [2]. Due to the long coherence time of stable energy levels of the atom, it appears to be a perfect qubit for encoding quantum information, i.e., one can exploit
B 1
Shengli Ma [email protected] Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices and Department of Applied Physics, School of Science, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China 0123456789().: V,-vol
123
301
Page 2 of 12
X. Li et al.
propagating photons to realize quantum connection and control over long distances [3,4]. Therefore, the cavity QED architecture has been regarded as a powerful tool for implementing all kinds of quantum computing protocols. Recently, many efforts have been devoted to developing the solid-state counterpart of the cavity QED, such as the integration of charged quantum dots [5–9] and nitrogenvacancy (NV) centers [10–14] with nanophotonic cavities. These composite structures eliminate the complex laser cooling and electromagnetic trapping procedures and offer a scalable quantum photonic architecture for building quantum networks. Quantum dots exhibit excellent optical properties [15], but have limited coherence time [16,17]. On the contrary, electronic spins associated with NV centers have long coherence time even at room temperature [18], but suffer from weak and
Data Loading...
