Mixing of counterpropagating signals in a traveling-wave Josephson device

• URL: http://arxiv.org/abs/2406.19751v2
• Date: Mon, 21 Jul 2025 11:51:19 GMT
• Title: Mixing of counterpropagating signals in a traveling-wave Josephson device
• Abstract summary: Light waves do not interact in vacuum, but may mix through various parametric processes when traveling in a nonlinear medium.<n>These conditions are typically met when all waves propagate in the medium with comparable phase velocity along a particular axis.<n>In this work, we investigate an alternative scheme by which an input microwave signal propagating along a 1-dimensional Josephson metamaterial is converted to an output wave propagating in the opposite direction.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Light waves do not interact in vacuum, but may mix through various parametric processes when traveling in a nonlinear medium. In particular, a high-amplitude wave can be leveraged to frequency convert a low-amplitude signal, as long as the overall energy and momentum of interacting photons are conserved. These conditions are typically met when all waves propagate in the medium with comparable phase velocity along a particular axis. In this work, we investigate an alternative scheme by which an input microwave signal propagating along a 1-dimensional Josephson metamaterial is converted to an output wave propagating in the opposite direction. The interaction is mediated by a pump wave propagating at low phase velocity. In this regime, the input signal is exponentially attenuated as it travels down the device. We exploit this process to implement a robust on-chip microwave isolator that can be reconfigured into a reciprocal and tunable coupler. The device mode of operation is selected in situ, along with its working frequency over a wide microwave range. We measure an isolation over 5 dB in the 5-8.5 GHz range and over 10 dB in the 7-8.5 GHz range on a typical bandwidth of 200 MHz. Substantial margin for improvement exists through design optimization and by reducing fabrication disorder, opening new avenues for microwave routing and processing in superconducting circuits.

Related papers

• ROMNet: a hybrid reduced order modeling and machine learning approach to waveform inversion [53.79823394212125]
  Waveform inversion seeks to estimate the wave speed of a heterogeneous, inaccessible medium.<n>We introduce the methodology, called ROMNet, and test it with numerical simulations.<n>We compare the performance of ROMNet with the direct ROM-based inversion and with two representative deep learning approaches to FWI.
  arXiv  Detail & Related papers  (2026-08-25T21:13:39Z)
• 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)
• Doppler-induced tunable and shape-preserving frequency conversion of microwave wave packets [30.5491665195957]
  We introduce a new approach to microwave frequency conversion harnessing a dynamic Doppler effect induced by a propagating front separating regions of different phase velocities.<n>We were able to implement frequency shifts of microwave wave packets at 500 MHz and 4 GHz of up to 3.7 % while preserving their temporal shape.<n>These features demonstrate the potential of our frequency-conversion technique as a promising tool for advanced control of microwave wave packets for different quantum applications.
  arXiv  Detail & Related papers  (2026-03-12T20:34:41Z)
• A frequency-agile microwave-optical interface for superconducting qubits [6.817203480218872]
  Superconducting quantum processors operate at microwave frequencies in millikelvin environments.<n>Coherent microwave-to-optical (M2O) enables superconducting quantum networks by interfacing microwave photons with low-loss optical fiber.<n>We demonstrate a frequency-agile microwave-optical interface that overcomes this bandwidth mismatch by cascading an electro-optic M2O transducer with a multimode microwave-to-microwave (M2M) frequency converter.
  arXiv  Detail & Related papers  (2026-02-27T15:38:09Z)
• Pump Free Microwave-Optical Quantum Transduction [35.696886559001676]
  We propose a pump-free scheme that generates time-bin encoded M-O Bell pairs.<n>By combining a state-of-the-art spin-optical interface with our proposed strongly-coupled spin-microwave design, the scheme can generate M-O Bell pairs at a heralding rate exceeding one kilohertz.
  arXiv  Detail & Related papers  (2025-12-04T18:57:26Z)
• Microwave Circulation in an Extended Josephson Junction Ring [0.0]
  We propose a design for nonreciprocal microwave transmission based on an extended, annular Josephson junction.<n>We show how to harness this to build a high-quality resonant microwave circulator.
  arXiv  Detail & Related papers  (2025-12-01T23:13:57Z)
• Generation of Frequency-Tunable Shaped Single Microwave Photons Using a Fixed-Frequency Superconducting Qubit [3.4904925657410466]
  scaling up a superconducting quantum computer will require quantum communication between remote chips. To realize high-fidelity communication, it is essential to control the frequency and temporal shape of the microwave photon. We demonstrate the generation of frequency-tunable shaped microwave photons without resorting to any frequency-tunable circuit element.
  arXiv  Detail & Related papers  (2025-03-07T16:03:33Z)
• Enhancement of Microwave to Optical Spin-Based Quantum Transduction via a Magnon Mode [0.0]
  We propose a new method for converting single microwave photons to single optical sideband photons based on spinful impurities in magnetic materials. We identify the needed magnetic interactions as well as potential materials systems to enable this speed-up using erbium dopants for telecom compatibility.
  arXiv  Detail & Related papers  (2024-11-19T21:31:37Z)
• Microwave-to-optical conversion in a room-temperature $^{87}$Rb vapor with frequency-division multiplexing control [0.0]
  Experimental demonstration of coherent microwave-to-optical conversion that maps a microwave signal to a large, tunable 550(30) MHz range of optical frequencies using room-temperature $87$Rb atoms. With frequency-divisioning capability, multi-channel conversion, and amplitude control of frequency channels, neutral atomic systems may be effective quantum processors for quantum information encoded in frequency-bin qubits.
  arXiv  Detail & Related papers  (2023-05-30T17:09:50Z)
• An integrated microwave-to-optics interface for scalable quantum computing [47.187609203210705]
  We present a new design for an integrated transducer based on a superconducting resonator coupled to a silicon photonic cavity. We experimentally demonstrate its unique performance and potential for simultaneously realizing all of the above conditions. Our device couples directly to a 50-Ohm transmission line and can easily be scaled to a large number of transducers on a single chip.
  arXiv  Detail & Related papers  (2022-10-27T18:05:01Z)
• Quantum-limited millimeter wave to optical transduction [50.663540427505616]
  Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
  arXiv  Detail & Related papers  (2022-07-20T18:04:26Z)
• High-efficiency microwave-optical quantum transduction based on a cavity electro-optic superconducting system with long coherence time [52.77024349608834]
  Frequency conversion between microwave and optical photons is a key enabling technology to create links between superconducting quantum processors. We propose a microwave-optical platform based on long-coherence-time superconducting radio-frequency (SRF) cavities. We show that the fidelity of heralded entanglement generation between two remote quantum systems is enhanced by the low microwave losses.
  arXiv  Detail & Related papers  (2022-06-30T17:57:37Z)
• 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)
• Slowing down light in a qubit metamaterial [98.00295925462214]
  superconducting circuits in the microwave domain still lack such devices. We demonstrate slowing down electromagnetic waves in a superconducting metamaterial composed of eight qubits coupled to a common waveguide. Our findings demonstrate high flexibility of superconducting circuits to realize custom band structures.
  arXiv  Detail & Related papers  (2022-02-14T20:55:10Z)
• Broadband Squeezed Microwaves and Amplification with a Josephson Traveling-Wave Parametric Amplifier [0.8527063867655793]
  Squeezing of the electromagnetic vacuum is an essential metrological technique used to reduce quantum noise in applications spanning gravitational wave detection, biological microscopy, and quantum information science. We develop a dual-pump, broadband Josephson traveling-wave parametric amplifier that combines a phase-sensitive extinction ratio of 56 dB with single-mode squeezing on par with the best resonator-based squeezers. Our amplifier is capable of simultaneously creating entangled microwave photon pairs with large frequency separation, with potential applications including high-fidelity qubit readout, quantum illumination and teleportation.
  arXiv  Detail & Related papers  (2022-01-27T01:31:32Z)
• Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial [40.96261204117952]
  Entangled microwave photons form a fundamental resource for quantum information processing and sensing. We use a low-loss Josephson metamaterial to generate frequency-entangled photons from vacuum fluctuations at a rate of 2 giga entangled bits per second spanning over 4 GHz bandwidth.
  arXiv  Detail & Related papers  (2021-11-11T11:05:17Z)
• High-Fidelity Quantum Information Transmission Using a Room-Temperature Nonrefrigerated Lossy Microwave Waveguide [0.0]
  Quantum microwave transmission is key to realizing modular superconducting quantum computers and distributed quantum networks. The closeness of the transmitted quantum state to the source-generated quantum state at the input of the transmission link degrades due to the presence of incoherent photons. We propose a novel method for high-fidelity quantum microwave transmission using a room-temperature lossy waveguide.
  arXiv  Detail & Related papers  (2021-07-26T22:41:18Z)
• A low-noise on-chip coherent microwave source [0.0]
  We report an on-chip device that is based on a Josephson junction coupled to a spiral resonator and is capable of coherent continuous-wave microwave emission. The infidelity of typical quantum gate operations due to the phase noise of this cryogenic 25-pW microwave source is less than 0.1% up to 10-ms evolution times.
  arXiv  Detail & Related papers  (2021-03-13T04:51:53Z)
• 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)
• 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)
• Cavity quantum electro-optics: Microwave-telecom conversion in the quantum ground state [0.0]
  We present a cavity electro-optic transceiver operating in a millikelvin environment with a mode occupancy as low as 0.025 $pm$ 0.005 noise photons. The device is versatile and compatible with superconducting qubits, which might open the way for fast and deterministic entanglement distribution between microwave and optical fields.
  arXiv  Detail & Related papers  (2020-05-26T14:35:27Z)
• Information transfer by quantum matterwave modulation [68.8204255655161]
  We show that matterwaves can be applied for information transfer and that their quantum nature provides a high level of security. Our technique allows transmitting a message by a non-trivial modulation of an electron matterwave in a biprism interferometer. We also present a key distribution protocol based on the quantum nature of the matterwaves that can reveal active eavesdropping.
  arXiv  Detail & Related papers  (2020-03-19T03:37:01Z)

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.