Twist-and-Turn Spin Squeezing in Bose-Einstein Condensates

Bibliographic Details
Title: Twist-and-Turn Spin Squeezing in Bose-Einstein Condensates
Authors: Muessel, W., Strobel, H., Linnemann, D., Zibold, T., Juliá-Díaz, B., Oberthaler, M. K.
Publication Year: 2015
Collection: Condensed Matter
Quantum Physics
Subject Terms: Quantum Physics, Condensed Matter - Quantum Gases
More Details: We experimentally demonstrate an alternative method for the dynamic generation of atomic spin squeezing, building on the interplay between linear coupling and nonlinear phase evolution. Since the resulting quantum dynamics can be seen as rotation and shear on the generalized Bloch sphere, we call this scheme twist-and-turn (TnT). This is closely connected to an underlying instability in the classical limit of this system. The short-time evolution of the quantum state is governed by a fast initial spreading of the quantum uncertainty in one direction, accompanied by squeezing in the orthogonal axis. We find an optimal value of $\xi_{\text{S}}^2=-7.1(3)$ dB in a single BEC and scalability of the squeezing to more than 10^4 particles with $\xi_{\text{S}}^2=-2.8(4)$ dB.
Comment: 6 pages, 6 figures
Document Type: Working Paper
Access URL: http://arxiv.org/abs/1507.02930
Accession Number: edsarx.1507.02930
Database: arXiv
More Details
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