Multi-stage Quantum Amplifier Readout Chain

• URL: http://arxiv.org/abs/2607.07614v1
• Date: Wed, 08 Jul 2026 16:29:58 GMT
• Title: Multi-stage Quantum Amplifier Readout Chain
• Abstract summary: We demonstrate a readout chain based on a two-stage kinetic inductance TWPA (KTWPA)<n>This quantum-amplifier-based-readout-chain (QARC) provides sufficient gain that a cryogenic semiconductor follow-on amplifier can be eliminated without degradation of the system noise.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Multi-stage cryogenic readout chains with a wide bandwidth and added noise within a few quanta of the quantum limit are frequently constructed using traveling-wave parametric amplifiers (TWPAs) as the first stage, and a semiconductor amplifier as the second stage. Unfortunately for highly-scaled superconducting detector arrays, or quantum information systems, and space-based observatories, the power dissipation of the semiconductor amplifier becomes problematic from the perspective of available cryogenic cooling power at \mbox{3~K to 4~K}. Here we demonstrate a readout chain based on a two-stage kinetic inductance TWPA (KTWPA). This quantum-amplifier-based-readout-chain (QARC) provides sufficient gain that a cryogenic semiconductor follow-on amplifier can be eliminated without degradation of the system noise. In this way, the QARC dissipates approximately three orders of magnitude less power than readout chains containing semiconductor amplifiers while adding noise of less than 2~quanta over a 1~GHz bandwidth. In addition, by leveraging the high power handling of kinetic inductance technology, the QARC maintains an input compression point of -93~dBm, which exceeds that of many contemporary Josephson-junction-based parametric amplifiers.

Related papers

• Phase-stable voltage bias for Josephson photonics devices [58.079925240809644]
  Parametric interactions are foundational to superconducting quantum technologies.<n> Microwave-driven pumping introduces parasitic Kerr nonlinearities and higher-order harmonics that limit device performance.<n>Josephson Photonics avoids these parasitics by utilizing dc-biased junctions.
  arXiv  Detail & Related papers  (2026-09-15T13:31:29Z)
• On-chip Parametric Amplification in a Double Quantum Dots Circuit [6.78776618337146]
  In microwave-based quantum circuits, such as double quantum dots (DQDs), superconducting qubits and spin qubits, parametric amplifiers are indispensable.<n>Here, we demonstrate an on-site single-atom parametric amplifier (SAPA) within a reconfigurable quantum circuit.
  arXiv  Detail & Related papers  (2026-03-19T09:29:40Z)
• DC-powered broadband quantum-limited microwave amplifier [0.0]
  dc-powered broadband amplifier operating within 0.2 photons of the quantum limit.<n>ICTA delivers 13 dB of average gain across a 3.5 GHz bandwidth in a single stage.
  arXiv  Detail & Related papers  (2025-12-22T22:07:08Z)
• Compact Superconducting Kinetic Inductance Traveling Wave Parametric Amplifiers with On-chip rf Components [0.0]
  We present the design and validation of microfabricated bias tees and directional couplers for operating three-wave mixing kinetic inductance TWPAs.<n>Our device displays a 2.8 GHz 3 dB bandwidth with a median true gain of 17.5 dB and median system noise of 3.4 quanta.
  arXiv  Detail & Related papers  (2025-03-05T15:45:19Z)
• Development of KI-TWPAs for the DARTWARS project [45.045423476064414]
  Noise at the quantum limit over a broad bandwidth is a fundamental requirement for future cryogenic experiments. We develop Kinetic Inductance Travelling-Wave Parametric Amplifiers (KI-TWPAs) for low temperature detectors and qubit read-out. KI-TWPAs are typically operated in a threewave mixing (3WM) mode and are characterised by a high gain, a high saturation power, a large amplification bandwidth and nearly quantum limited noise performance.
  arXiv  Detail & Related papers  (2024-02-19T17:18:25Z)
• Broadband parametric amplification in DARTWARS [64.98268713737]
  Traveling-Wave Parametric Amplifiers (TWPAs) may be especially suitable for practical applications due to their multi-Gigahertz amplification bandwidth. The DARTWARS project aims to develop a KITWPA capable of achieving $20,$ dB of amplification. The measurements revealed an average amplification of approximately $9,$dB across a $2,$GHz bandwidth for a KITWPA spanning $17,$mm in length.
  arXiv  Detail & Related papers  (2024-02-19T10:57:37Z)
• Selective Single and Double-Mode Quantum Limited Amplifier [0.0]
  A quantum-limited amplifier enables the amplification of weak signals while introducing minimal noise dictated by the principles of quantum mechanics. These amplifiers serve a broad spectrum of applications in quantum computing, including fast and accurate readout of superconducting qubits and spins. We experimentally develop a novel quantum-limited amplifier based on superconducting kinetic inductance.
  arXiv  Detail & Related papers  (2023-11-20T02:37:58Z)
• Readout of a quantum processor with high dynamic range Josephson parametric amplifiers [132.67289832617647]
  Device is matched to the 50 $Omega$ environment with a bandwidth of 250-300 MHz, with input saturation powers up to -95 dBm at 20 dB gain. A 54-qubit Sycamore processor was used to benchmark these devices. Design has no adverse effect on system noise, readout fidelity, or qubit dephasing.
  arXiv  Detail & Related papers  (2022-09-16T07:34:05Z)
• 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)
• Gate-tunable, superconductor-semiconductor parametric amplifier [0.0]
  The device's resonant frequency is field-effect tunable over a range of 2 GHz. The JoFET amplifier has 20 dB of gain, 4 MHz of instantaneous bandwidth, and a 1 dB compression point of -125.5 dBm when operated at a fixed resonance frequency.
  arXiv  Detail & Related papers  (2022-06-12T14:28:00Z)
• Quantum Dot-Based Parametric Amplifiers [0.0]
  Josephson parametric amplifiers (JPAs) approaching quantum-limited noise performance have been instrumental in enabling high fidelity readout of superconducting qubits and, recently, semiconductor quantum dots (QDs) We propose that the quantum capacitance arising in electronic two-level systems can provide an alternative dissipation-less non-linear element for parametric amplification. We experimentally demonstrate phase-sensitive parametric amplification using a QD-reservoir electron transition in a CMOS nanowire split-gate transistor embedded in a 1.8GHz superconducting lumped-element microwave cavity.
  arXiv  Detail & Related papers  (2021-11-23T12:40:47Z)
• Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module [47.187609203210705]
  We propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. Our proposal exhibits higher tolerance for noise in comparison to the standard receiver, thus enabling the distribution of secret keys in the condition of 4 dB-higher classical power.
  arXiv  Detail & Related papers  (2021-06-09T13:52:27Z)
• Universal non-adiabatic control of small-gap superconducting qubits [47.187609203210705]
  We introduce a superconducting composite qubit formed from two capacitively coupled transmon qubits. We control this low-frequency CQB using solely baseband pulses, non-adiabatic transitions, and coherent Landau-Zener interference. This work demonstrates that universal non-adiabatic control of low-frequency qubits is feasible using solely baseband pulses.
  arXiv  Detail & Related papers  (2020-03-29T22:48:34Z)

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.