Tsarev D V, Arakelian S M, Chuang You-Lin, Lee Ray-Kuang, Alodjants A P
Opt Express. 2018 Jul 23;26(15):19583-19595. doi: 10.1364/OE.26.019583.
Considering matter wave bright solitons from weakly coupled Bose-Einstein condensates trapped in a double-well potential, we study the formation of macroscopic non-classical states, including Schrödinger-cat superposition state and maximally path entangled N00N-state. We examine these macroscopic states by Mach-Zehnder interferometer in the context of parity measurements, which has been done to obtain Heisenberg limit accuracy for linear phase shift measurement. We reveal that the ratio of two-body scattering length to intra-well hopping parameter can be measured with the scaling beyond this limit by using nonlinear phase shift with interacting quantum solitons.
考虑到被困在双阱势中的弱耦合玻色-爱因斯坦凝聚体中的物质波亮孤子，我们研究了宏观非经典态的形成，包括薛定谔猫叠加态和最大路径纠缠N00N态。我们在奇偶性测量的背景下，通过马赫-曾德尔干涉仪来检验这些宏观态，这已被用于获得线性相移测量的海森堡极限精度。我们揭示，通过使用相互作用量子孤子的非线性相移，可以在超出此极限的标度下测量两体散射长度与阱内跳跃参数的比值。
