Stark-localized probes with exponentially graded potentials V_j = e^{a j} deliver exponentially scaling quantum Fisher information for weak-field sensing in equilibrium and non-equilibrium regimes.
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In the 1D attractive Fermi polaron the quasi-particle residue decays as Z = W N^{-2 δ_F² / π²} with δ_F the Bethe-ansatz phase shift at the Fermi edge and W obtained numerically.
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Exponentially-enhanced Weak-field Sensing with Quantum Stark Localization
Stark-localized probes with exponentially graded potentials V_j = e^{a j} deliver exponentially scaling quantum Fisher information for weak-field sensing in equilibrium and non-equilibrium regimes.
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Explicit proof of Anderson's orthogonality catastrophe for the one-dimensional Fermi polaron with attractive interaction
In the 1D attractive Fermi polaron the quasi-particle residue decays as Z = W N^{-2 δ_F² / π²} with δ_F the Bethe-ansatz phase shift at the Fermi edge and W obtained numerically.