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Quantum sensing in Kerr parametric oscillators
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Quantum metrology and quantum sensing aim to use quantum properties to enhance measurement precision beyond what could be classically achieved. Here, we demonstrate how the analysis of the phase space structure of the classical limit of Kerr parametric oscillators can be used for determining control parameters values that lead to the squeezing of the uncertainty in position and the amplification of the quantum Fisher information. We also explore how quantum sensing can benefit from excited-state quantum phase transitions, even in the absence of a conventional quantum phase transition. The system that we consider models exciton-polariton condensates and superconducting circuits, making our study relevant for potential experimental applications.
Forward citations
Cited by 2 Pith papers
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Manifestations of flow topology in a quantum driven-dissipative system
Quantum fluctuations preserve the flow-topological structure of the classical driven-dissipative Kerr oscillator, and a chirality response spectrum can detect topological phases without Liouvillian gap closing.
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Squeezed states for Frenkel-like two-fermion composite bosons
Squeezed Frenkel-like cobosons, defined as eigenstates of a Bogoliubov-transformed coboson operator, have uncertainty product (1−⟨D⟩)/2, dropping below canonical 1/2 due to Pauli blocking.
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