Multiqubit entanglement generation with squeezed modes
Alexandru Macridin, Andrew Cameron, Cristián Peña, S. Xie, Raju Valivarthi, Panagiotis Spentzouris · Physical Review A · 2025
We present a hybrid continuous variable--discrete variable entanglement generation protocol using linear optics and homodyne measurements, capable of producing multiple high-fidelity Bell pairs per protocol iteration, with an approximate 0.5 success probability. The effectiveness of the protocol is determined by the squeezing strength. To increase the number of Bell pairs, approximately 3 dB of extra squeezing is needed for each additional Bell pair. The protocol also generates single Bell pairs with an approximate 0.75 probability for squeezing strengths $⪅15\phantom{\rule{0.28em}{0ex}}\mathrm{dB}$, achievable with current technology.