Using materials for quasiparticle engineering

• URL: http://arxiv.org/abs/2107.09695v1
• Date: Tue, 20 Jul 2021 18:02:09 GMT
• Title: Using materials for quasiparticle engineering
• Authors: Gianluigi Catelani, Jukka P. Pekola
• Abstract summary: Bogoliubov quasiparticles are a source of errors in qubits and electron pumps in superconducting devices. To improve operation of the latter devices, ways to mitigate quasiparticle effects have been devised. In particular, combining different materials quasiparticles can be trapped where they do no harm and their generation can be impeded.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The fundamental excitations in superconductors - Bogoliubov quasiparticles - can be either a resource or a liability in superconducting devices: they are what enables photon detection in microwave kinetic inductance detectors, but they are a source of errors in qubits and electron pumps. To improve operation of the latter devices, ways to mitigate quasiparticle effects have been devised; in particular, combining different materials quasiparticles can be trapped where they do no harm and their generation can be impeded. We review recent developments in these mitigation efforts and discuss open questions.

Related papers

• Quantum Parity Detectors: a qubit based particle detection scheme with meV thresholds for rare-event searches [0.7806419532725035]
  Quantum parity detectors (QPDs) use the tremendous sensitivity of superconducting qubits to quasiparticle tunneling events as their detection concept. We lay out the operating mechanism, noise sources, and expected sensitivity of QPDs based on a spectrum of charge-qubit types and readout mechanisms.
  arXiv  Detail & Related papers  (2024-05-27T14:17:33Z)
• Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source [0.0]
  We systematically study the properties of a transmon qubit under illumination by focused infrared radiation. Despite the high energy of incident photons, our observations agree well with a model of low-energy quasiparticle dynamics dominated by trapping.
  arXiv  Detail & Related papers  (2023-12-10T14:01:14Z)
• 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)
• Engineering superconducting qubits to reduce quasiparticles and charge noise [14.613106897690752]
  We experimentally demonstrate how to control quasiparticle generation by downsizing the qubit. We shape the electromagnetic environment of the qubit above the superconducting gap, inhibiting quasiparticle poisoning. Our findings support the hypothesis that quasiparticle generation is dominated by the breaking of Cooper pairs at the junction.
  arXiv  Detail & Related papers  (2022-02-03T06:40:21Z)
• 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)
• Moving beyond the transmon: Noise-protected superconducting quantum circuits [55.49561173538925]
  superconducting circuits offer opportunities to store and process quantum information with high fidelity. Noise-protected devices constitute a new class of qubits in which the computational states are largely decoupled from local noise channels. This Perspective reviews the theoretical principles at the heart of these new qubits, describes recent experiments, and highlights the potential of robust encoding of quantum information in superconducting qubits.
  arXiv  Detail & Related papers  (2021-06-18T18:00:13Z)
• Nonthermal pathways to ultrafast control in quantum materials [2.0971479389679333]
  We review recent progress in utilizing ultrafast light-matter interaction to control the macroscopic properties of quantum materials. Particular emphasis is placed on photoinduced phenomena that do not result from ultrafast heating effects. We discuss a selection of recently discovered effects leveraging these mechanisms, as well as the technological advances that led to their discovery.
  arXiv  Detail & Related papers  (2021-03-27T12:19:36Z)
• 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)
• Circuit Quantum Electrodynamics [62.997667081978825]
  Quantum mechanical effects at the macroscopic level were first explored in Josephson junction-based superconducting circuits in the 1980s. In the last twenty years, the emergence of quantum information science has intensified research toward using these circuits as qubits in quantum information processors. The field of circuit quantum electrodynamics (QED) has now become an independent and thriving field of research in its own right.
  arXiv  Detail & Related papers  (2020-05-26T12:47:38Z)
• Bogoliubov Quasiparticles in Superconducting Qubits [0.0]
  In the three-dimensional cavity implementations of circuit QED, the coherence of superconducting qubits was improved dramatically due to cutting the losses associated with the photon emission. Next frontier in improving the coherence includes the mitigation of the adverse effects of superconducting quasiparticles.
  arXiv  Detail & Related papers  (2020-03-09T19:09:00Z)

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.