Multimode entanglement generation with dual-pumped four-wave-mixing of Rubidium Atoms

Abstract

Multimode entanglement is essential for the generation of quantum networks, which plays a central role in quantum information processing and quantum metrology. Here, we study the spatial multimode entanglement characteristics of the large scale quantum states via a dual-pumped four-wave-mixing (FWM) process of Rubidium atomics vapors. A linear mode transform approach is applied to solve the four- and six-mode Gaussian states and the analytical input-output relations are presented. Moreover, via reconstructing the full covariance matrix of the produced states, versatile entanglement with from two up to six modes is analyzed. The results show that most of the 1 versus n-mode and m versus n-mode states are entangled, and the amount of entanglement can be regulated due to the competitions of mode components caused by different interaction strengths of co-existing FWMs. Our study could be applied for any multimode Gaussian states with a quadratic Hamiltonian.

Beating the 3 dB quantum squeezing enhancement limit of two-mode phase-sensitive amplifier by multi-beam interference

“…ε 1 is the nonlinear interaction strength of single-pump FWM process [41] associated with Pump 1 or Pump 2 . ε 2 is the nonlinear interaction strength of dual-pump FWM process associated with both Pump 1 and Pump 2 [42]. ϕ 1 (ϕ 2 ) is the phase of the Pump 1 (Pump 2 ).…”

Three‐Mode Squeezing of Simultaneous and Ordinal Cascaded Four‐Wave Mixing Processes in Rubidium Vapor

“…[ 36,37 ] And using two pump beams of the same frequency to cascade FWM processes to generate multimode quantum correlated beams. [ 38–43 ]…”