Rapid microwave-only characterization and readout of quantum dots using multiplexed gigahertz-frequency resonators

• URL: http://arxiv.org/abs/2103.03659v1
• Date: Fri, 5 Mar 2021 13:33:42 GMT
• Title: Rapid microwave-only characterization and readout of quantum dots using multiplexed gigahertz-frequency resonators
• Authors: Damaz de Jong, Christian Prosko, Daan M. A. Waardenburg, Lin Han, Filip K. Malinowski, Peter Krogstrup, Leo P. Kouwenhoven, Jonne V. Koski, Wolfgang Pfaff
• Abstract summary: We report the experimental investigation of an InAs nanowire multi-quantum dot device by probing GHz resonators connected to the device. Because our technique does not rely on DC calibration, it could potentially obviate the need for DC measurements in semiconductor qubit devices.
• Score: 1.275488826211572
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Superconducting resonators enable fast characterization and readout of mesoscopic quantum devices. Finding ways to perform measurements of interest on such devices using resonators only is therefore of great practical relevance. We report the experimental investigation of an InAs nanowire multi-quantum dot device by probing GHz resonators connected to the device. First, we demonstrate accurate extraction of the DC conductance from measurements of the high-frequency admittance. Because our technique does not rely on DC calibration, it could potentially obviate the need for DC measurements in semiconductor qubit devices. Second, we demonstrate multiplexed gate sensing and the detection of charge tunneling on microsecond time scales. The GHz detection of dispersive resonator shifts allows rapid acquisition of charge-stability diagrams, as well as resolving charge tunneling in the device with a signal-to-noise ratio of up to 15 in one microsecond. Our measurements show that GHz-frequency resonators may serve as a universal tool for fast tune-up and high-fidelity readout of semiconductor qubits.

Related papers

• Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling [0.20742830443146304]
  We perform readout of a quantum-dot hybrid qubit coupled to a superconducting resonator through a parametric, longitudinal interaction mechanism. Our experiments are performed with the qubit and resonator frequencies detuned by $sim$10 GHz, demonstrating that longitudinal coupling can facilitate semiconductor qubit operation in the 'ultra-dispersive' regime of circuit quantum electrodynamics.
  arXiv  Detail & Related papers  (2024-07-11T21:11:12Z)
• Two-tone spectroscopy for the detection of two-level systems in superconducting qubits [108.40985826142428]
  Two-level systems (TLS) of unclear physical origin are a major contributor to decoherence in superconducting qubits. We propose a novel method that requires only a microwave drive and dispersive readout, and thus also works fixed-frequency qubits.
  arXiv  Detail & Related papers  (2024-04-22T09:53:00Z)
• Characterizing losses in InAs two-dimensional electron gas-based gatemon qubits [4.597795956436758]
  We present continuous-wave and time-domain characterization of gatemon qubits and coplanar waveguide resonators based on an InAs two-dimensional electron gas. We show that the qubit undergoes a vacuum Rabi splitting with a readout cavity and we drive coherent Rabi oscillations between the qubit ground and first excited states. We detail the loss mechanisms present in these materials through a systematic study of the quality factors of coplanar waveguide resonators.
  arXiv  Detail & Related papers  (2023-09-29T14:23:28Z)
• Tunable Capacitor For Superconducting Qubits Using an InAs/InGaAs Heterostructure [0.0]
  Development of low loss, high contrast couplers is critical for scaling up superconducting qubits. We present a blueprint for a gate-tunable coupler realized with a two-dimensional electron gas in an InAs/InGaAs heterostructure.
  arXiv  Detail & Related papers  (2022-12-08T23:10:55Z)
• 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)
• Enhancing the Coherence of Superconducting Quantum Bits with Electric Fields [62.997667081978825]
  We show that qubit coherence can be improved by tuning defects away from the qubit resonance using an applied DC-electric field. We also discuss how local gate electrodes can be implemented in superconducting quantum processors to enable simultaneous in-situ coherence optimization of individual qubits.
  arXiv  Detail & Related papers  (2022-08-02T16:18:30Z)
• First design of a superconducting qubit for the QUB-IT experiment [50.591267188664666]
  The goal of the QUB-IT project is to realize an itinerant single-photon counter exploiting Quantum Non Demolition (QND) measurements and entangled qubits. We present the design and simulation of the first superconducting device consisting of a transmon qubit coupled to a resonator using Qiskit-Metal.
  arXiv  Detail & Related papers  (2022-07-18T07:05:10Z)
• 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)
• Near-Field Terahertz Nanoscopy of Coplanar Microwave Resonators [61.035185179008224]
  Superconducting quantum circuits are one of the leading quantum computing platforms. To advance superconducting quantum computing to a point of practical importance, it is critical to identify and address material imperfections that lead to decoherence. Here, we use terahertz Scanning Near-field Optical Microscopy to probe the local dielectric properties and carrier concentrations of wet-etched aluminum resonators on silicon.
  arXiv  Detail & Related papers  (2021-06-24T11:06:34Z)
• Charge-noise spectroscopy of Si/SiGe quantum dots via dynamically-decoupled exchange oscillations [0.0]
  We measure the charge-noise spectrum of a Si/SiGe singlet-triplet qubit over nearly 12 decades in frequency. The noise is colored across the entire frequency range of our measurements, although the spectral exponent changes with frequency. Simple transport measurements can accurately characterize the charge noise over a wide frequency range in Si/SiGe quantum dots.
  arXiv  Detail & Related papers  (2021-03-03T14:50:40Z)
• Large flux-mediated coupling in hybrid electromechanical system with a transmon qubit [0.0]
  Control over the quantum states of a massive oscillator is important for several technological applications. We present a hybrid device, consisting of a superconducting transmon qubit and a mechanical resonator coupled using the magnetic-flux. With improvements in qubit coherence, this system offers a novel platform to realize rich interactions and could potentially provide full control over the quantum motional states.
  arXiv  Detail & Related papers  (2020-01-16T08:59:14Z)

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.