Causality in PT-symmetric systems carries a topological charge at exceptional points, causing a pole migration that produces a Lorentzian residual in Kramers-Kronig relations whose magnitude scales as |gamma - gamma_c|^(-1.08).
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A finite-frequency fluctuation-response inequality bounds the measured lock-in response-to-noise matrix by the output-field quantum Fisher information rate for Markovian open quantum systems.
Thermal rubidium vapor shows collective strong coupling to integrated microring resonators, with measured collective coupling strength g_N/2π ≈ 1 GHz and cooperativity C_N ≈ 2, inferring about 20 participating atoms.
Rydberg-dressed interactions added to a driven-dissipative Dicke model produce a superradiant continuous time crystal phase in an interacting spin-1/2 system.
A three-parameter family of generalized four-mode squeezed vacuum states exhibits a transient bound-entangled phase under thermal bath noise before separability.
Numerical simulations of intracavity triplet down conversion identify steady-state regimes with measurable squeezing and entanglement, validated against Monte Carlo wave-function methods for low populations.
citing papers explorer
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Topological Charge of Causality at a PT-Symmetric Exceptional Point
Causality in PT-symmetric systems carries a topological charge at exceptional points, causing a pole migration that produces a Lorentzian residual in Kramers-Kronig relations whose magnitude scales as |gamma - gamma_c|^(-1.08).
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Finite-frequency fluctuation-response bounds for open quantum systems
A finite-frequency fluctuation-response inequality bounds the measured lock-in response-to-noise matrix by the output-field quantum Fisher information rate for Markovian open quantum systems.
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Collective Strong Coupling of Thermal Atoms to Integrated Microring Resonators
Thermal rubidium vapor shows collective strong coupling to integrated microring resonators, with measured collective coupling strength g_N/2π ≈ 1 GHz and cooperativity C_N ≈ 2, inferring about 20 participating atoms.
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Dissipative dynamics and superradiant countinuous time crystal in a Rydberg-dressed Dicke system
Rydberg-dressed interactions added to a driven-dissipative Dicke model produce a superradiant continuous time crystal phase in an interacting spin-1/2 system.
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Noisy dynamics of Gaussian entanglement: a transient bound entangled phase before separability
A three-parameter family of generalized four-mode squeezed vacuum states exhibits a transient bound-entangled phase under thermal bath noise before separability.
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Steady states, squeezing, and entanglement in intracavity triplet down conversion
Numerical simulations of intracavity triplet down conversion identify steady-state regimes with measurable squeezing and entanglement, validated against Monte Carlo wave-function methods for low populations.