Performance enhancement in Josephson traveling wave parametric amplifiers by tailoring the relative distance between junctions

• URL: http://arxiv.org/abs/2509.07292v1
• Date: Mon, 08 Sep 2025 23:53:31 GMT
• Title: Performance enhancement in Josephson traveling wave parametric amplifiers by tailoring the relative distance between junctions
• Authors: M. A. Gali Labarias, T. Yamada, Y. Nakashima, Y. Urade, J. Claramunt, K. Inomata,
• Abstract summary: We find an optimal sub-unit-cell size ratio, which maximizes both gain and bandwidth, while equally spaced junctions offer minimum performance.<n>We show that this method can be combined with resonant-phase matching and predicts an ideal gain above 29 dB on a 4 GHz bandwidth with 1998 junctions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Josephson traveling wave parametric amplifiers with heterogeneously spaced junctions are theoretically investigated. We consider unit cells with three junctions and characterize their interaction by spatially displaced fields defined by node fluxes. To solve this problem we define the system action and apply the variational principle to obtain the static action, which determines the equations of motion. This work shows that gain and bandwidth can be increased by modifying the relative distance between junctions within the same unit cell, thus increasing the effective nonlinear interaction. We find an optimal sub-unit-cell size ratio, which maximizes both gain and bandwidth, while equally spaced junctions offer minimum performance. Even though this method does not rely on phase-matching, the same device can operate at different pump frequencies, it requires a very large number of JJs to achieve gains above 20 dB. We show that this method can be combined with resonant-phase matching and predicts an ideal gain above 29 dB on a 4 GHz bandwidth with 1998 junctions. Despite possible challenges fabricating devices at the optimal sub-unit-cell size with current technologies, substantial gain increase can still be achieved at sub-optimal sizes.

Related papers

• Long-Range Entangling Operations via Josephson Junction Metasurfaces [0.0]
  We implement two-qubit entangling operations between distant superconducting qubits using a space-time modulated Josephson junction metasurface.<n>We show entangling fidelity exceeding 98% maintained over centimeter scale separations.
  arXiv  Detail & Related papers  (2025-06-17T20:19:03Z)
• On Disentangled Training for Nonlinear Transform in Learned Image Compression [59.66885464492666]
  Learned image compression (LIC) has demonstrated superior rate-distortion (R-D) performance compared to traditional codecs.<n>Existing LIC methods overlook the slow convergence caused by compacting energy in learning nonlinear transforms.<n>We propose a linear auxiliary transform (AuxT) to disentangle energy compaction in training nonlinear transforms.
  arXiv  Detail & Related papers  (2025-01-23T15:32:06Z)
• Josephson Traveling Wave Parametric Amplifiers with Plasma oscillation phase-matching [0.0]
  We propose to employ the Josephson junctions, which constitute the centerline of the amplifier, as resonant elements for phase matching.<n>The proposed TWPA design has a gain of 15 dB and a 3.5 GHz bandwidth, which is comparable to the state-of-the-art TWPAs.
  arXiv  Detail & Related papers  (2024-08-29T19:22:50Z)
• Ab-Initio Calculations of Nonlinear Susceptibility and Multi-Phonon Mixing Processes in a 2DEG-Piezoelectric Heterostructure [41.94295877935867]
  Solid-state elastic-wave phonons are a promising platform for a wide range of quantum information applications. We propose a general architecture using piezoelectric-semiconductor heterostructures. We show that, for this system, the strong third-order nonlinearity could enable single-phonon Kerr shift in an acoustic cavity.
  arXiv  Detail & Related papers  (2024-02-01T03:34:41Z)
• Extended Josephson junction qubit system [0.0]
  Circuit quantum electrodynamics (QED) has emerged as a promising platform for implementing quantum computation and simulation. We introduce a novel QED architecture based on extended Josephson Junctions (JJs), which possess a non-negligible spatial extent. Our platform has potential applications in quantum computation, specifically in implementing single- and two-qubit gates within a single junction.
  arXiv  Detail & Related papers  (2023-09-11T03:17:39Z)
• Autonomous coherence protection of a two-level system in a fluctuating environment [68.8204255655161]
  We re-examine a scheme originally intended to remove the effects of static Doppler broadening from an ensemble of non-interacting two-level systems (qubits) We demonstrate that this scheme is far more powerful and can also protect a single (or even an ensemble) qubit's energy levels from noise which depends on both time and space.
  arXiv  Detail & Related papers  (2023-02-08T01:44:30Z)
• Numerical analysis of a three-wave-mixing Josephson traveling-wave parametric amplifier with engineered dispersion loadings [62.997667081978825]
  Recently proposed Josephson traveling-wave parametric amplifier has great potential in achieving a gain of 20 dB and a flat bandwidth of at least 4 GHz. We model the advanced JTWPA circuit with periodic modulation of the circuit parameters. engineered dispersion loadings allow achieving sufficiently wide $3$ dB-bandwidth from $3$ GHz to $9$ GHz combined with a reasonably small ripple.
  arXiv  Detail & Related papers  (2022-09-22T14:46:04Z)
• 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)
• Photoinduced prethermal order parameter dynamics in the two-dimensional large-$N$ Hubbard-Heisenberg model [77.34726150561087]
  We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model. We simulate the light-induced transition between two competing phases.
  arXiv  Detail & Related papers  (2022-05-13T13:13:31Z)
• Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams [0.0]
  We investigate the deterministic generation and distribution of entanglement in large quantum networks by driving distant qubits with the output fields of a non-degenerate parametric amplifier. Our findings show that this passive conversion of Gaussian- into discrete- variable entanglement offers a robust and experimentally very attractive approach for operating large optical, microwave or hybrid quantum networks.
  arXiv  Detail & Related papers  (2022-04-06T18:00:01Z)
• Self phase-matched broadband amplification with a left-handed Josephson transmission line [0.46040036610482665]
  Josephson Traveling Wave Parametric Amplifiers (J-TWPAs) are promising platforms for realizing broadband quantum-limited amplification of microwave signals. We present a simple J-TWPA design based on left-handed' (negative-index) nonlinear Josephson metamaterial. The resultant efficiency of four-wave mixing process can implement gains in excess of 20 dB over few GHz bandwidths with much shorter lines.
  arXiv  Detail & Related papers  (2022-01-12T19:23:15Z)
• Thermal coupling and effect of subharmonic synchronization in a system of two VO2 based oscillators [55.41644538483948]
  We explore a prototype of an oscillatory neural network (ONN) based on vanadium dioxide switching devices. The effective action radius RTC of coupling depends both on the total energy released during switching and on the average power. In the case of a strong thermal coupling, the limit of the supply current parameters, for which the oscillations exist, expands by 10 %. The effect of subharmonic synchronization hold promise for application in classification and pattern recognition.
  arXiv  Detail & Related papers  (2020-01-06T03:26:53Z)

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.