Multipartite entanglement in a microwave frequency comb

• URL: http://arxiv.org/abs/2112.12105v2
• Date: Mon, 27 Mar 2023 23:11:35 GMT
• Title: Multipartite entanglement in a microwave frequency comb
• Abstract summary: We find 64 correlated modes in the transmission line using a multifrequency digital signal processing platform. Our method can be expanded to generate even more entangled modes in the near future.
• Score: 46.48105302776331
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Significant progress has been made with multipartite entanglement of discrete qubits, but continuous variable systems may provide a more scalable path toward entanglement of large ensembles. We demonstrate multipartite entanglement in a microwave frequency comb generated by a Josephson parametric amplifier subject to a bichromatic pump. We find 64 correlated modes in the transmission line using a multifrequency digital signal processing platform. Full inseparability is verified in a subset of seven modes. Our method can be expanded to generate even more entangled modes in the near future.

Related papers

• Compressive Spectrum Sensing via Spectral Multiplexing in Rydberg Atomic Receiver [50.057865570993506]
  Rydberg-atomic receivers exhibit exceptional sensitivity yet are fundamentally constrained by the narrow instantaneous bandwidth.<n>We propose a spectral multiplexing framework implemented in a waveguide-coupled Rydberg atomic receiver.
  arXiv  Detail & Related papers  (2026-07-02T10:38:49Z)
• Coherent transfer via parametric control of normal-mode splitting in a superconducting multimode resonator [3.888099490646304]
  We show an on-chip multimode resonator in which strong parametric modulation induces a large and tunable normal-mode splitting.<n>By switching off the modulation before the beating arrives, we realize on-demand storage and retrieval.<n>This protocol offers a practical route toward a controllable quantum-memory mechanism in superconducting circuits.
  arXiv  Detail & Related papers  (2025-12-17T05:08:04Z)
• Multimode RF Reflectometry for Spin Qubit Readout and Device Characterization [0.0553142145150568]
  We introduce a multimode superconducting inductor architecture that enables radio-frequency reflectometry at multiple discrete frequencies up to 2 GHz.<n>By probing a quantum dot across several modes, we extract tunneling rates over a broad frequency range and identify signatures of nearby charge defects.<n>We demonstrate single-shot spin readout via a radio-frequency single-electron transistor (RF-SET), achieving singlet-triplet readout with an integration time of 8 us and a readout fidelity of 98%.
  arXiv  Detail & Related papers  (2025-12-04T18:53:13Z)
• Long-range entanglement and quantum correlations in a multi-frequency comb system [6.1530499191648085]
  We show how a series of nonlinearly coupled frequency combs generates inter- and intracomb two-mode squeezing and entanglement spanning a very large spectral range.<n>Our findings could enable tunable broadband ghost spectroscopy protocols, squeezing-enhanced pump-probe measurements, and broadband entanglement between spectrally-multiplexed quanta of information.
  arXiv  Detail & Related papers  (2025-11-17T17:10:07Z)
• Programmable Microwave Cluster States via Josephson Metamaterials [0.0]
  Cluster states are a fundamental resource for continuous-variable quantum computing.<n>We demonstrate on-demand generation of multimode entangled microwave cluster states.<n>This platform opens new avenues for scalable measurement-based quantum information processing.
  arXiv  Detail & Related papers  (2025-07-30T16:37:37Z)
• Multimode amplitude squeezing through cascaded nonlinear optical processes [1.8865372809555165]
  Multimode squeezed light is enticing for several applications, from squeezed frequency combs for spectroscopy to signal multiplexing in optical computing. Bright squeezing in multiple discrete frequency modes, if realized, could unlock novel applications in quantum-enhanced spectroscopy and optical quantum computing.
  arXiv  Detail & Related papers  (2024-05-08T16:39:09Z)
• Multipartite Entanglement in Bright Frequency Combs from Microresonators [0.0]
  We present a theoretical model of multimode quantum correlations in bright frequency combs generated in continuous-wave regime by microresonators above threshold. Our analysis shows how these correlations emerge from cascading four-wave mixing processes fed by the input pump as well as the generated bright beams.
  arXiv  Detail & Related papers  (2023-10-03T07:40:11Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• Intermodulation Distortion in a Josephson Traveling Wave Parametric Amplifier [2.814412986458045]
  Josephson traveling wave parametric amplifiers enable amplification of weak microwave signals close to the quantum limit. Intermodulation distortion can lead to significant crosstalk and reduction of fidelity for multiplexed readout of superconducting qubits.
  arXiv  Detail & Related papers  (2022-10-10T16:03:23Z)
• Extensible circuit-QED architecture via amplitude- and frequency-variable microwaves [52.77024349608834]
  We introduce a circuit-QED architecture combining fixed-frequency qubits and microwave-driven couplers. Drive parameters appear as tunable knobs enabling selective two-qubit coupling and coherent-error suppression.
  arXiv  Detail & Related papers  (2022-04-17T22:49:56Z)
• Cavity-QED of a quantum metamaterial with tunable disorder [0.0]
  We explore a quantum metamaterial based on a superconducting chip with 25 frequency-tunable transmon qubits coupled to a common coplanar resonator. The collective bright and dark modes are probed via the microwave response, i.e., by measuring the transmission amplitude of an external microwave signal.
  arXiv  Detail & Related papers  (2021-07-03T12:24:56Z)
• Multimode-polariton superradiance via Floquet engineering [55.41644538483948]
  We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density of excitation of the atomic cloud.
  arXiv  Detail & Related papers  (2020-11-24T19:00:04Z)
• Sideband control of a multimode quantum bulk acoustic system [0.0]
  Multimode bulk acoustic systems show promise for use in superconducting quantum computation. We experimentally demonstrate accessing individual acoustic modes without being hindered by the uniform frequency spacing of the modes.
  arXiv  Detail & Related papers  (2020-06-09T18:36:17Z)
• 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)
• High-fidelity spatial mode transmission through a 1-km-long multimode fiber via vectorial time reversal [51.28090008093831]
  We develop and experimentally demonstrate a vectorial time reversal technique for long multimode fibers. Average modal fidelity above 80% for 210 Laguerre-Gauss and Hermite-Gauss modes by using vectorial time reversal over an unstabilized 1-km-long fiber. We also propose a practical and scalable spatial-mode-multiplexed quantum communication protocol over long multimode fibers to illustrate potential applications.
  arXiv  Detail & Related papers  (2020-03-22T13:13:58Z)

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.