Programmable Microwave Cluster States via Josephson Metamaterials

• URL: http://arxiv.org/abs/2507.22823v1
• Date: Wed, 30 Jul 2025 16:37:37 GMT
• Title: Programmable Microwave Cluster States via Josephson Metamaterials
• Authors: A. Alocco, A. Celotto, E. Palumbo, B. Galvano, P. Livreri, L. Fasolo, L. Callegaro, E. Enrico,
• Abstract summary: 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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Cluster states are a fundamental resource for continuous-variable quantum computing, enabling measurement-based protocols that can scale beyond the limitations of qubit-based architectures. Here, we demonstrate on-demand generation of multimode entangled microwave cluster states using a programmable Josephson Traveling-Wave Parametric Amplifier (JTWPA) operated in the three-wave mixing regime. By injecting a tailored, non-equidistant set of pump tones via an arbitrary waveform generator, we engineer frequency-specific nonlinear couplings between multiple frequency modes. The entanglement structure is verified via frequency-resolved heterodyne detection of quadrature nullifiers, confirming the target graph topology of the cluster state. Our approach allows reconfigurability through the pumps spectrum and supports scalability by leveraging the wide bandwidth and spatial homogeneity of the JTWPA. This platform opens new avenues for scalable measurement-based quantum information processing in the microwave domain, compatible with superconducting circuit architectures.

Related papers

• Generation of Structured Light and Controlled-NOT Gate in Microwave Regime [0.0]
  We propose a theoretical model for generating microwave beams with non-zero orbital angular momentum. We have developed a Controlled NOT gate based on a three-level atomic system. The generation of Laguerre-Gaussian fields in the microwave domain opens up novel possibilities for advanced information processing in wireless communication.
  arXiv  Detail & Related papers  (2024-10-24T08:15:42Z)
• Deterministic generation of a 20-qubit two-dimensional photonic cluster state [87.34681687753141]
  We present a device capable of emitting large-scale entangled microwave photonic states in a two dimensional ladder structure. By interleaving two-qubit gates with controlled photon emission, we generate 2 x n grids of time- and frequency-multiplexed cluster states of itinerant microwave photons. We measure a signature of localizable entanglement across up to 20 photonic qubits.
  arXiv  Detail & Related papers  (2024-09-10T16:25:24Z)
• A scheme for fully programmable linear quantum networks based on frequency conversion [0.0]
  Linear optical quantum networks, consisting of a quantum input state and a multi-port interferometer, are an important building block for many quantum technological concepts. Here, we propose the implementation of such networks based on frequency conversion by utilising a so called multi-output quantum pulse gate (mQPG) This approach allows the resource efficient and therefore scalable implementation of frequency-bin based, fully programmable interferometers in a single spatial and polarization mode.
  arXiv  Detail & Related papers  (2024-02-09T21:20:19Z)
• 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)
• Topological Josephson parametric amplifier array: A proposal for directional, broadband, and low-noise amplification [39.58317527488534]
  Low-noise microwave amplifiers are crucial for detecting weak signals in fields such as quantum technology and radio astronomy. We show that compact devices with few sites can achieve exceptional performance, with gains exceeding 20 dB over a bandwidth ranging from hundreds of MHz to GHz. The device also operates near the quantum noise limit and provides topological protection against up to 15% fabrication disorder.
  arXiv  Detail & Related papers  (2022-07-27T18:07:20Z)
• Topological multi-mode waveguide QED [49.1574468325115]
  We show how to take advantage of topologically protected propagating modes by interfacing them with quantum emitters. Such capabilities pave the way for generating quantum gates among topologically protected photons as well as generating more complex entangled states of light in topological channels.
  arXiv  Detail & Related papers  (2022-07-05T14:48:50Z)
• Optimal quantum control via genetic algorithms for quantum state engineering in driven-resonator mediated networks [68.8204255655161]
  We employ a machine learning-enabled approach to quantum state engineering based on evolutionary algorithms. We consider a network of qubits -- encoded in the states of artificial atoms with no direct coupling -- interacting via a common single-mode driven microwave resonator. We observe high quantum fidelities and resilience to noise, despite the algorithm being trained in the ideal noise-free setting.
  arXiv  Detail & Related papers  (2022-06-29T14:34:00Z)
• Design Methodologies for Integrated Quantum Frequency Processors [0.0]
  We introduce a model for the design of quantum frequency processors. We estimate the performance of single and parallel frequency-bin Hadamard gates. Our model is general, simple to use, and extendable to other material platforms.
  arXiv  Detail & Related papers  (2022-04-26T13:57:12Z)
• 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)
• Continuous variable multimode quantum states via symmetric group velocity matching [0.0]
  We exploit symmetric group velocity matching (SGVM) to engineer the properties of the squeezed modes of the parametric down conversion (PDC) This work paves the way towards the engineering of future large-scale quantum networks in the continuous variable regime.
  arXiv  Detail & Related papers  (2020-12-25T20:52:32Z)
• Universal Gate Set for Continuous-Variable Quantum Computation with Microwave Circuits [101.18253437732933]
  We provide an explicit construction of a universal gate set for continuous-variable quantum computation with microwave circuits. As an application, we show that this architecture allows for the generation of a cubic phase state with an experimentally feasible procedure.
  arXiv  Detail & Related papers  (2020-02-04T16:51:59Z)
• Near-degenerate quadrature-squeezed vacuum generation on a silicon-nitride chip [54.87128096861778]
  In this Letter, we demonstrate the generation of quadrature-phase squeezed states in the radio-frequency carrier sideband using a small-footprint silicon-nitride microresonator with a dual-pumped four-wave-mixing process. It is critical to account for the nonlinear behavior of the pump fields to properly predict the squeezing that can be generated in this system.
  arXiv  Detail & Related papers  (2020-02-04T01:41:41Z)

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.