Collective Coherent Perfect Absorption in a Synthetic Photon-Phonon Lattice

• URL: http://arxiv.org/abs/2607.18902v1
• Date: Tue, 21 Jul 2026 09:42:01 GMT
• Title: Collective Coherent Perfect Absorption in a Synthetic Photon-Phonon Lattice
• Abstract summary: Coherent perfect absorption (CPA) has emerged as a powerful paradigm for controlling classical and quantum light.<n>Here, we experimentally demonstrate collective interference-induced CPA in a synthetic photon--phonon lattice.<n>Our results identify collective interference as a route to quantum-compatible perfect absorption and long-lived quantum storage.
• Score: 8.569717464007345
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Coherent perfect absorption (CPA) has emerged as a powerful paradigm for controlling classical and quantum light, and has been demonstrated across a broad range of physical platforms. CPA realized in optomechanics relies on interference between the input field and the mechanically scattered field, but is intrinsically confined to the weak-cooperativity regime, resulting in a narrow absorption bandwidth and the mechanical mode remains thermally occupied. Here, we experimentally demonstrate collective interference-induced CPA in a synthetic photon--phonon lattice. By harnessing cavity-reservoir-mediated interactions among Floquet lattice sites, collective interference shifts the CPA condition deep into the high-cooperativity regime. This enables CPA to coexist with ground-state cooling of the mechanical oscillator, together with a broadened non-Lorentzian absorption lineshape and a singular group-delay response. Our results identify collective interference as a route to quantum-compatible perfect absorption and long-lived quantum storage.

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