A flux tunable superconducting quantum circuit based on Weyl semimetal MoTe2

• URL: http://arxiv.org/abs/2010.14107v1
• Date: Tue, 27 Oct 2020 07:24:39 GMT
• Title: A flux tunable superconducting quantum circuit based on Weyl semimetal MoTe2
• Authors: K. L. Chiu, D. G. Qian, J. W. Qiu, W. Y. Liu, D. Tan, V. Mosallanejad, S. Liu, Z. T. Zhang, Y. Zhao, D. P. Yu
• Abstract summary: We present a transmon-like superconducting quantum intereference device (SQUID) SQUID consists of junctions made of Weyl semimetal Td-MoTe2 and superconducting leads niobium nitride (NbN) We demonstrate a JJ made of MoTe2 and a flux-tunable transmon-like circuit based on Weyl materials.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Weyl semimetals for their exotic topological properties have drawn considerable attention in many research fields. When in combination with s-wave superconductors, the supercurrent can be carried by their topological surface channels, forming junctions mimic the behavior of Majorana bound states. Here, we present a transmon-like superconducting quantum intereference device (SQUID) consists of lateral junctions made of Weyl semimetal Td-MoTe2 and superconducting leads niobium nitride (NbN). The SQUID is coupled to a readout cavity made of molybdenum rhenium (MoRe), whose response at high power reveal the existence of the constituting Josephson junctions (JJs). The loop geometry of the circuit allows the resonant frequency of the readout cavity to be tuned by the magnetic flux. We demonstrate a JJ made of MoTe2 and a flux-tunable transmon-like circuit based on Weyl materials. Our study provides a platform to utilize topological materials in SQUID-based quantum circuits for potential applications in quantum information processing.

Related papers

• Quantum dynamics of superconductor-quantum dot-superconductor Josephson junctions [0.0]
  We study the self-consistent quantization of a capacitively-shunted S-QD-S junction via path-integral formulation. Results are important to understand future experiments and quantum devices incorporating S-QD-S junctions in arbitrary impedance environments.
  arXiv  Detail & Related papers  (2024-02-15T21:14:59Z)
• Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [58.720142291102135]
  Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials. We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model. We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
  arXiv  Detail & Related papers  (2023-07-21T18:00:07Z)
• Chiral SQUID-metamaterial waveguide for circuit-QED [6.218498009194957]
  We propose a method to engineer 1D Josephson microwave waveguide as a chiral metamaterial. We analyze both Markovian and non-Markovian quantum dynamics, and find that superconducting qubits can dissipate photons unidirectionally. Our work might open the possibilities to exploit SQUID metamaterials realizing unidirectional photon transport in circuit-QED platforms.
  arXiv  Detail & Related papers  (2022-06-14T03:45:41Z)
• Singlet-doublet transitions of a quantum dot Josephson junction detected in a transmon circuit [2.610856432667959]
  Microwave spectroscopy of the transmon's transition spectrum allows us to probe the ground state parity of the quantum dot. Our results can facilitate the realization of semiconductor-based $0-pi$ qubits and Andreev qubits.
  arXiv  Detail & Related papers  (2022-02-25T15:20:55Z)
• TOF-SIMS Analysis of Decoherence Sources in Nb Superconducting Resonators [48.7576911714538]
  Superconducting qubits have emerged as a potentially foundational platform technology. Material quality and interfacial structures continue to curb device performance. Two-level system defects in the thin film and adjacent regions introduce noise and dissipate electromagnetic energy.
  arXiv  Detail & Related papers  (2021-08-30T22:22:47Z)
• 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)
• Epitaxial Superconductor-Semiconductor Two-Dimensional Systems for Superconducting Quantum Circuits [0.0]
  Materials innovation and design breakthroughs have increased functionality and coherence of qubits substantially over the past two decades. We show by improving interface between InAs as a semiconductor and Al as a superconductor, one can reliably fabricate voltage-controlled Josephson junction field effect transistor (JJ-FET) We present the anharmonicity and coupling strengths from one and two-photon absorption in a quantum two level system fabricated with a JJ-FET.
  arXiv  Detail & Related papers  (2021-03-26T19:09:59Z)
• Quantum Sensors for Microscopic Tunneling Systems [58.720142291102135]
  tunneling Two-Level-Systems (TLS) are important for micro-fabricated quantum devices such as superconducting qubits. We present a method to characterize individual TLS in virtually arbitrary materials deposited as thin-films. Our approach opens avenues for quantum material spectroscopy to investigate the structure of tunneling defects.
  arXiv  Detail & Related papers  (2020-11-29T09:57:50Z)
• Integration of topological insulator Josephson junctions in superconducting qubit circuits [0.0]
  We report on the realization of superconducting transmon qubits implemented with semiconductor Josephson junctions (JJs) Microwave losses on our substrates with monolithically integrated hardmask, used for selective area growth of TI nanostructures, imply microsecond limits to relaxation times. Our results pave the way for advanced investigations of topological materials in both novel Josephson and topological qubits.
  arXiv  Detail & Related papers  (2020-07-08T16:05:13Z)
• 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)

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.