Engineering One Axis Twisting via a Dissipative Berry Phase Using Strong Symmetries

We show how a driven-dissipative cavity coupled to a collective ensemble of atoms can dynamically generate metrologically useful spin-squeezed states. In contrast to other dissipative approaches, we do not rely on complex engineered dissipation or input states, nor do we require tuning the system to...

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Bibliographic Details
Published in:arXiv.org 2024-01
Main Authors: Young, Jeremy T, Chaparro, Edwin, Asier Piñeiro Orioli, Thompson, James K, Rey, Ana Maria
Format: Article
Language:English
Subjects:
Critical point
Dissipation
Excitation
Quantum electrodynamics
Quantum entanglement
Quantum mechanics
Squeezed states (quantum theory)
Symmetry
Twisting
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Summary:We show how a driven-dissipative cavity coupled to a collective ensemble of atoms can dynamically generate metrologically useful spin-squeezed states. In contrast to other dissipative approaches, we do not rely on complex engineered dissipation or input states, nor do we require tuning the system to a critical point. Instead, we utilize a strong symmetry, a special type of symmetry that can occur in open quantum systems and emerges naturally in systems with collective dissipation, such as superradiance. This symmetry preserves coherence and allows for the accumulation of an atom number-dependent Berry phase which in turn creates spin-squeezed states via emergent one-axis twisting dynamics. This work shows that it is possible to generate entanglement in an atom-cavity resonant regime with macroscopic optical excitations of the system, going beyond the typical dispersive regime with negligible optical excitations often utilized in current cavity QED experiments.
ISSN:2331-8422