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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Power-law-graded Ising interactions stabilize discrete time crystals in Floquet-driven spin-1/2 chains, yielding superlinear energy storage as a quantum battery and superextensive quantum Fisher information for timing sensing beyond the Heisenberg limit.
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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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Power-law-graded Ising Interactions Stabilize Time Crystals Realizing Quantum Energy Storage and Sensing
Power-law-graded Ising interactions stabilize discrete time crystals in Floquet-driven spin-1/2 chains, yielding superlinear energy storage as a quantum battery and superextensive quantum Fisher information for timing sensing beyond the Heisenberg limit.