Low-temperature benchmarking of qubit control wires by primary electron thermometry

• URL: http://arxiv.org/abs/2403.17720v1
• Date: Tue, 26 Mar 2024 14:03:19 GMT
• Title: Low-temperature benchmarking of qubit control wires by primary electron thermometry
• Authors: Elias Roos Hansen, Ferdinand Kuemmeth, Joost van der Heijden,
• Abstract summary: We make use of a primary electron thermometry technique, using a Coulomb blockade thermometer, to establish the electron temperature in the millikelvin regime. We verify the results by also using another electron thermometry technique, based on a superconductor-insulator-normal metal junction.
• Score: 32.97208255533144
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Low-frequency qubit control wires require non-trivial thermal anchoring and low-pass filtering. The resulting electron temperature serves as a quality benchmark for these signal lines. In this technical note, we make use of a primary electron thermometry technique, using a Coulomb blockade thermometer, to establish the electron temperature in the millikelvin regime. The experimental four-probe measurement setup, the data analysis, and the measurement limitations are discussed in detail. We verify the results by also using another electron thermometry technique, based on a superconductor-insulator-normal metal junction. Our comparison of signal lines with QDevil's QFilter to unfiltered signal lines demonstrates that the filter significantly reduces both the rms noise and electron temperature, which is measured to be 22 $\pm$ 1 mK.

Related papers

• Quantum thermometry for ultralow temperatures using probe and ancilla qubit chains [0.0]
  We propose a scheme to enhance the range and precision of ultralow temperature measurements by employing a probe qubit coupled to a chain of ancilla qubits. This study highlights the potential of the probe qubit-ancilla chain system as a powerful and precise tool for quantum thermometry in the ultralow temperature regime.
  arXiv  Detail & Related papers  (2024-12-19T14:28:04Z)
• Thermometry Based on a Superconducting Qubit [0.0]
  We report temperature measurements using a transmon qubit by detecting the population of its first three energy levels. We measure the effective temperature of the qubit and characterize its relaxation and coherence times. We present a numerical model of the qubit population distribution and compare it favorably with the experimental results.
  arXiv  Detail & Related papers  (2024-09-04T15:00:16Z)
• Electron Thermometry [0.0]
  Performance and accuracy of quantum electronics is substantially degraded when the temperature of the electrons in the devices is too high. The electron temperature can be reduced with appropriate thermal anchoring and by filtering both the low frequency and radio frequency noise. Ultimately, for high performance filters the electron temperature can approach the phonon temperature in a dilution refrigerator.
  arXiv  Detail & Related papers  (2024-03-24T21:51:02Z)
• A highly-sensitive broadband superconducting thermoelectric single-photon detector [62.997667081978825]
  A thermoelectric detector (TED) converts a finite temperature difference caused by the absorption of a single photon into an open circuit thermovoltage. Our TED is able to reveal single-photons of frequency ranging from about 15 GHz to about 150 PHz depending on the chosen design and materials.
  arXiv  Detail & Related papers  (2023-02-06T17:08:36Z)
• Thermal self-oscillations in monolayer graphene coupled to a superconducting microwave cavity [58.720142291102135]
  We observe thermal self-oscillations in a monolayer graphene flake coupled to superconducting resonator. The experimental observations fit well with theoretical model based on thermal instability. The modelling of the oscillation sidebands provides a method to evaluate electron phonon coupling in disordered graphene sample at low energies.
  arXiv  Detail & Related papers  (2022-05-27T15:38:41Z)
• Bending the rules of low-temperature thermometry with periodic driving [0.0]
  We show that near-resonant driving changes the power law that governs thermal sensitivity over a broad range of temperatures. We demonstrate that periodic driving allows for a sensitivity improvement of several orders of magnitude in sub-nanokelvin temperature estimates.
  arXiv  Detail & Related papers  (2022-03-04T17:10:55Z)
• Measurement of the Low-temperature Loss Tangent of High-resistivity Silicon with a High Q-factor Superconducting Resonator [58.720142291102135]
  We present the direct loss tangent measurement of a high-resist intrinsicivity (100) silicon wafer in the temperature range from 70 mK to 1 K. The measurement was performed using a technique that takes advantage of a high quality factor superconducting niobium resonator.
  arXiv  Detail & Related papers  (2021-08-19T20:13:07Z)
• Role of topology in determining the precision of a finite thermometer [58.720142291102135]
  We find that low connectivity is a resource to build precise thermometers working at low temperatures. We compare the precision achievable by position measurement to the optimal one, which itself corresponds to energy measurement.
  arXiv  Detail & Related papers  (2021-04-21T17:19:42Z)
• Dynamical Coulomb blockade under a temperature bias [0.0]
  We observe and comprehend the dynamical Coulomb blockade suppression of the electrical conductance across an electronic quantum channel submitted to a temperature difference. For a quantum channel in the tunnel regime, a close match is found between conductance measurements and tunnel dynamical Coulomb blockade theory. In the opposite near ballistic regime, we develop a theory that accounts for different electronic and electromagnetic bath temperatures.
  arXiv  Detail & Related papers  (2021-04-08T14:45:42Z)
• Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions [64.31011847952006]
  We propose an adiabatic method for optimal phonon temperature estimation using trapped ions. The relevant information of the phonon thermal distributions can be transferred to the collective spin-degree of freedom. We show that each of the thermal state probabilities is adiabatically mapped onto the respective collective spin-excitation configuration.
  arXiv  Detail & Related papers  (2020-12-16T12:58:08Z)
• Primary thermometry of propagating microwaves in the quantum regime [0.0]
  We propose and experimentally demonstrate thermometry of propagating microwaves using a transmon-type superconducting circuit. Our device operates continuously, with a sensitivity down to $4times 10-4$ photons/$sqrtmboxHz$ and a bandwidth of 40 MHz. This thermometry scheme can find applications in benchmarking and characterization of cryogenic microwave setups, temperature measurements in hybrid quantum systems, and quantum thermodynamics.
  arXiv  Detail & Related papers  (2020-03-30T14:48:30Z)
• Magnon-Phonon Quantum Correlation Thermometry [0.0]
  A large fraction of quantum science and technology requires low-temperature environments such as those afforded by dilution refrigerators. Here, we theoretically propose a primary thermometer based on measurement of a hybrid system consisting of phonons coupled via a magnetostrictive interaction to magnons.
  arXiv  Detail & Related papers  (2020-01-29T22:57:51Z)

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.