A quantum-chaotic cesium-vapor magnetometer
Lukas J. Fiderer,Daniel Braun +1 more
- Vol. 10934
TLDR
In this article, the authors show that large improvements in measurement precision are possible by modeling a spin-exchange relaxation-free alkali-vapor magnetometer where the non-linear kicks are realized by exploiting the ac Stark effect.Abstract:
Quantum-enhanced measurements represent the path towards the best measurement precision allowed by the laws of quantum mechanics. Known protocols usually rely on the preparation of entangled states and promise high or even optimal precision, but fall short in real-word applications because of the difficulty to generate entangled states and to protect them against decoherence. Here, we refrain from the preparation of entangled states but supplement the integrable parameter-encoding dynamics by non-linear kicks driving the system in the dynamical regime of quantum chaos. We show that large improvements in measurement precision are possible by modeling a spin-exchange relaxation-free alkali-vapor magnetometer where the non-linear kicks are realized by exploiting the ac Stark effect.read more
Citations
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Improving the dynamics of quantum sensors with reinforcement learning
TL;DR: In this paper, the cross-entropy method of reinforcement learning was used to optimize the strength and position of control pulses in quantum-chaotic sensors with super-radiant damping.
Journal ArticleDOI
Improving the dynamics of quantum sensors with reinforcement learning
TL;DR: In this paper, the cross-entropy method of reinforcement learning was used to optimize the strength and position of control pulses in quantum-chaotic sensors with super-radiant damping.
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Experimental long-lived entanglement of two macroscopic objects
TL;DR: The robust and long-lived entanglement of material objects demonstrated here to be useful in quantum information processing, including teleportation of quantum states of matter and quantum memory is expected.