Stationary two-qubit entanglement mediated by one-dimensional plasmonic nanoarrays

• URL: http://arxiv.org/abs/2512.16016v1
• Date: Wed, 17 Dec 2025 22:47:16 GMT
• Title: Stationary two-qubit entanglement mediated by one-dimensional plasmonic nanoarrays
• Authors: Luke C. Ugwuoke, Tjaart P. J. Krüger, Mark S. Tame,
• Abstract summary: Entanglement is one of the key measures of quantum correlations present in nanophotonic systems.<n>We study long-range plasmonic mediation of qubit--qubit entanglement by studying the impact of the number of mediating metal nanoparticles on stationary concurrence.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entanglement is one of the key measures of quantum correlations present in nanophotonic systems, with promising applications in quantum optics and beyond. Previous studies have shown that the degree of entanglement between two quantum dot qubits is preserved when a metal nanoparticle is used to mediate the interactions between the qubits. In this work, we investigate long-range plasmonic mediation of qubit--qubit entanglement by studying the impact of the number of mediating metal nanoparticles on stationary concurrence. Collinear and periodically spaced metal nanoparticles that satisfy the weak-coupling approximation are considered. An effective model that enables the derivation of the mediated interactions within the framework of cavity quantum electrodynamics is employed. Under weak driving at the single particle resonance frequency, the model shows that odd-number arrays are more robust to entanglement decay. We attribute this to strong inter-qubit dissipative coupling as a result of a hybridized dipole plasmon resonating with the driving frequency in odd-number arrays. These arrays can sustain non-vanishing stationary entanglement beyond an inter-qubit spacing of one micron, opening up the possibility of independent spatial optical probing of each quantum dot.

Related papers

• Multipolar and nonlocal effects in plasmon-mediated entanglement generation [0.0]
  We study the generation of quantum entanglement via plasmon-mediated coupling in quantum dot qubits in nanophotonics.<n>We find that multipolar modes and size-dependent damping lead to entanglement decay at small coupling distances and limit mediated entanglement with certain particle sizes.
  arXiv  Detail & Related papers  (2025-11-12T12:58:16Z)
• Quantum synchronization between two strongly driven YIG spheres mediated via a microwave cavity [0.0]
  We study synchronization between two strongly driven magnon modes indirectly coupled via a single-mode microwave cavity.<n>We show, by using input-output formalism, that both classical and quantum synchronization emerge for appropriate choices of coupling, detuning, and driving.
  arXiv  Detail & Related papers  (2025-07-22T21:56:31Z)
• Two-quanta processes in coupled double-quantum-dot cavity systems [0.0]
  We study the quantum dynamics of a compound sample consisting from a semiconductor double quantum dot (DQD) system non-linearly coupled with a leaking micro-resonator.<n>The steady-state quantum dynamics of this complex non-linear system exhibits a variety of possible effects.
  arXiv  Detail & Related papers  (2025-01-10T13:52:52Z)
• Spin Squeezing with Magnetic Dipoles [37.93140485169168]
  Entanglement can improve the measurement precision of quantum sensors beyond the shot noise limit.<n>We take advantage of the magnetic dipole-dipole interaction native to most neutral atoms to realize spin-squeezed states.<n>We achieve 7.1 dB of metrologically useful squeezing using the finite-range spin exchange interactions in an erbium quantum gas microscope.
  arXiv  Detail & Related papers  (2024-11-11T18:42:13Z)
• Elastic scattering on a quantum computer [0.0]
  We calculate the two-particle elastic scattering phase shift for a short-ranged interaction on a quantum computer. Schmidt decomposition is used to reduce quantum circuits nominally requiring tens of qubits to 2-qubit circuits.
  arXiv  Detail & Related papers  (2024-06-13T15:31:38Z)
• Cavity-mediated long-range interactions in levitated optomechanics [0.0]
  We show for the first time programmable cavity-mediated interactions between nanoparticles in vacuum. The interaction is mediated by photons scattered by spatially separated particles in a cavity. Our work paves the way towards exploring many-body effects in nanoparticles with programmable cavity-mediated interactions, generating entanglement of motion, and using interacting particle arrays for optomechanical sensing.
  arXiv  Detail & Related papers  (2023-08-28T17:24:23Z)
• Dipolar quantum solids emerging in a Hubbard quantum simulator [45.82143101967126]
  Long-range and anisotropic interactions promote rich spatial structure in quantum mechanical many-body systems. We show that novel strongly correlated quantum phases can be realized using long-range dipolar interaction in optical lattices. This work opens the door to quantum simulations of a wide range of lattice models with long-range and anisotropic interactions.
  arXiv  Detail & Related papers  (2023-06-01T16:49:20Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• Quantum chaos driven by long-range waveguide-mediated interactions [125.99533416395765]
  We study theoretically quantum states of a pair of photons interacting with a finite periodic array of two-level atoms in a waveguide. Our calculation reveals two-polariton eigenstates that have a highly irregular wave-function in real space.
  arXiv  Detail & Related papers  (2020-11-24T07:06:36Z)
• Stationary Gaussian Entanglement between Levitated Nanoparticles [0.0]
  Coherent scattering of photons is a novel mechanism of optomechanical coupling for optically levitated nanoparticles. We show that it allows efficient deterministic generation of Gaussian entanglement between two particles in separate tweezers.
  arXiv  Detail & Related papers  (2020-06-05T09:55:10Z)
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
  We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
  arXiv  Detail & Related papers  (2020-06-05T09:27:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.