Quantum trajectories in spin-exchange collisions reveal the nature of spin-noise correlations in multi-species alkali vapors

Abstract

Spin-exchange collisions in alkali vapors have been at the basis of several fundamental and applied investigations, like nuclear structure studies and tests of fundamental symmetries, ultra-sensitive atomic magnetometers, magnetic resonance and bio-magnetic imaging. Spin-exchange collisions cause loss of spin coherence, and concomittantly produce spin noise, both phenomena being central to quantum metrology. We here develop the quantum trajectory picture of spin-exchange collisions, consistent with their long-standing ensemble description using density matrices. We then use quantum trajectories to reveal the nature of spin-noise correlations that spontaneously build up in multi-species atomic vapors, frequently utilized in the most sensitive spin measurements.

arXiv comment6 pages, 3 figures

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Cited by in corpus (8)

• Quantum Dynamics of Collective Spin States in a Thermal Gas
• Spin-exchange collisions in hot vapors create and sustain bipartite entanglement
• Inter-species spin-noise correlations in hot atomic vapors
• Precision limits of tissue microstructure characterization by Magnetic Resonance Imaging
• Collision-induced spin noise
• Zero-field spin noise spectrum of an alkali vapor with strong spin-exchange coupling
• Creation and dynamics of spin fluctuations in a noisy magnetic field
• Anomalous high-density spin noise in a strongly interacting atomic vapor