A high-sensitivity charge sensor for silicon qubits above one kelvin

• URL: http://arxiv.org/abs/2103.06433v2
• Date: Tue, 8 Jun 2021 05:48:37 GMT
• Title: A high-sensitivity charge sensor for silicon qubits above one kelvin
• Authors: Jonathan Y. Huang, Wee Han Lim, Ross C. C. Leon, Chih Hwan Yang, Fay E. Hudson, Christopher C. Escott, Andre Saraiva, Andrew S. Dzurak, Arne Laucht
• Abstract summary: We exploit the tunneling between two quantised states in a double-island SET (DISET) to demonstrate a charge sensor with an improvement in signal-to-noise by an order of magnitude. With minor additional hardware overheads, these sensors can be integrated into existing qubit architectures for high fidelity charge readout at few-kelvin temperatures.
• Score: 0.6464439696329373
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent studies of silicon spin qubits at temperatures above 1 K are encouraging demonstrations that the cooling requirements for solid-state quantum computing can be considerably relaxed. However, qubit readout mechanisms that rely on charge sensing with a single-island single-electron transistor (SISET) quickly lose sensitivity due to thermal broadening of the electron distribution in the reservoirs. Here we exploit the tunneling between two quantised states in a double-island SET (DISET) to demonstrate a charge sensor with an improvement in signal-to-noise by an order of magnitude compared to a standard SISET, and a single-shot charge readout fidelity above 99 % up to 8 K at a bandwidth > 100 kHz. These improvements are consistent with our theoretical modelling of the temperature-dependent current transport for both types of SETs. With minor additional hardware overheads, these sensors can be integrated into existing qubit architectures for high fidelity charge readout at few-kelvin temperatures.

Related papers

• Coupled resonators based on high permittivity dielectrics for microwave sensors [0.0]
  We report on a coupled cavity configuration in which a superconducting cavity is coupled with a high permittivity resonator. The sensitivities of such configurations are discussed both in strong coupling and weak coupling regime. These results highlight the potential of the coupled resonator systems as microwave sensors and are useful for the engineering of high permittivity resonators for applications at cryogenic temperatures.
  arXiv  Detail & Related papers  (2024-10-08T08:57:40Z)
• Superconducting Qubits Above 20 GHz Operating over 200 mK [39.76747788992184]
  Current superconducting microwave qubits are cooled to extremely low temperatures to avoid sources of decoherence. To operate superconducting qubits at higher temperatures, it is necessary to address both quasiparticle decoherence and dephasing from thermal microwave photons. We fabricate transmons with higher frequencies than previously studied, up to 24 GHz.
  arXiv  Detail & Related papers  (2024-02-05T14:15:22Z)
• Design and simulation of a transmon qubit chip for Axion detection [103.69390312201169]
  Device based on superconducting qubits has been successfully applied in detecting few-GHz single photons via Quantum Non-Demolition measurement (QND) In this study, we present Qub-IT's status towards the realization of its first superconducting qubit device.
  arXiv  Detail & Related papers  (2023-10-08T17:11:42Z)
• Quantum-circuit refrigeration of a superconducting microwave resonator well below a single quantum [0.0]
  We experimentally demonstrate a proposed single-junction quantum-circuit refrigerator (QCR) for a superconducting 4.7-GHz resonator. We demonstrate coherent and thermal resonator states and that the on-demand dissipation provided by the QCR can drive these to a small fraction of a photon on average. This work introduces a versatile tool to study open quantum systems, quantum thermodynamics, and to quickly reset superconducting qubits.
  arXiv  Detail & Related papers  (2023-08-01T09:20:07Z)
• 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)
• Fast high-fidelity charge readout by operating the cavity-embedded Cooper pair transistor in the Kerr bistable regime [55.41644538483948]
  We demonstrate single-shot resolution between two charge states that are $0.09e$ apart. The measurement is performed with 94$%$ fidelity in a duration of 3 $mu$s.
  arXiv  Detail & Related papers  (2022-12-31T03:44:10Z)
• Five-second coherence of a single spin with single-shot readout in silicon carbide [84.97423065534817]
  We demonstrate single-shot readout of single defects in silicon carbide (SiC) We achieve over 80% readout fidelity without pre- or post-selection. We report single spin T2 > 5s, over two orders of magnitude greater than previously reported in this system.
  arXiv  Detail & Related papers  (2021-10-04T17:35:02Z)
• Depinning of the Charge-Density Waves in Quasi-2D 1T-TaS2 Devices Operating at Room Temperature [0.0]
  We report on depinning of nearly-commensurate charge-density waves in 1T-TaS2 thin-films at room temperature. The depinning process in 1T-TaS2 is not accompanied by an observable abrupt increase in electric current.
  arXiv  Detail & Related papers  (2021-04-29T00:17:19Z)
• Open-cavity in closed-cycle cryostat as a quantum optics platform [47.50219326456544]
  We present a fiber-based open Fabry-P'erot cavity in a closed-cycle cryostat exhibiting ultra-high mechanical stability. This set of results manifests open-cavity in a closed-cycle cryostat as a versatile and powerful platform for low-temperature cavity QED experiments.
  arXiv  Detail & Related papers  (2021-03-09T18:41:48Z)
• Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device [48.7576911714538]
  Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. Here we demonstrate the conditional, coherent control of an electron spin qubit in an exchange-coupled pair of $31$P donors implanted in silicon.
  arXiv  Detail & Related papers  (2020-06-08T11:25:16Z)
• A liquid nitrogen cooled superconducting transition edge sensor with ultra-high responsivity and GHz operation speeds [0.0]
  Photodetectors based on nano-structured superconducting thin films are some of the most sensitive quantum sensors and are key enabling technologies in such broad areas as quantum information, quantum computation and radio-astronomy. Here, we demonstrate a nitrogen cooled superconducting transition edge sensor, which shows orders of magnitude improved performance characteristics of any superconducting detector operated above 77K. It is based on van der Waals heterostructures of the high temperature superconductor Bi2Sr2CaCu2O8, which are shaped into nano-wires with ultra-small form factor.
  arXiv  Detail & Related papers  (2020-06-04T21:00:11Z)

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.