Qubits made by advanced semiconductor manufacturing

• URL: http://arxiv.org/abs/2101.12650v1
• Date: Fri, 29 Jan 2021 15:41:39 GMT
• Title: Qubits made by advanced semiconductor manufacturing
• Authors: A.M.J. Zwerver, T. Kr\"ahenmann, T.F. Watson, L. Lampert, H.C. George, R. Pillarisetty, S.A. Bojarski, P. Amin, S.V. Amitonov, J.M. Boter, R. Caudillo, D. Corras-Serrano, J.P. Dehollain, G. Droulers, E.M. Henry, R. Kotlyar, M. Lodari, F. Luthi, D.J. Michalak, B.K. Mueller, S. Neyens, J. Roberts, N. Samkharadze, G. Zheng, O.K. Zietz, G. Scappucci, M. Veldhorst, L.M.K. Vandersypen, J.S. Clarke
• Abstract summary: Full-scale quantum computers require the integration of millions of quantum bits. The promise of leveraging industrial semiconductor manufacturing to meet this requirement has fueled the pursuit of quantum computing in silicon quantum dots. Here, we demonstrate quantum dots fabricated in a 300 mm semiconductor manufacturing facility using all-optical lithography and fully industrial processing.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Full-scale quantum computers require the integration of millions of quantum bits. The promise of leveraging industrial semiconductor manufacturing to meet this requirement has fueled the pursuit of quantum computing in silicon quantum dots. However, to date, their fabrication has relied on electron-beam lithography and, with few exceptions, on academic style lift-off processes. Although these fabrication techniques offer process flexibility, they suffer from low yield and poor uniformity. An important question is whether the processing conditions developed in the manufacturing fab environment to enable high yield, throughput, and uniformity of transistors are suitable for quantum dot arrays and do not compromise the delicate qubit properties. Here, we demonstrate quantum dots hosted at a 28Si/28SiO2 interface, fabricated in a 300 mm semiconductor manufacturing facility using all-optical lithography and fully industrial processing. As a result, we achieve nanoscale gate patterns with remarkable homogeneity. The quantum dots are well-behaved in the multi-electron regime, with excellent tunnel barrier control, a crucial feature for fault-tolerant two-qubit gates. Single-spin qubit operation using magnetic resonance reveals relaxation times of over 1 s at 1 Tesla and coherence times of over 3 ms, matching the quality of silicon spin qubits reported to date. The feasibility of high-quality qubits made with fully-industrial techniques strongly enhances the prospects of a large-scale quantum computer

Related papers

• Industrial 300$\,$mm wafer processed spin qubits in natural silicon/silicon-germanium [0.8219694762753349]
  Quantum dots hosted in a natural Si/SiGe heterostructure fully fabricated by an industrial 300$,$mm semiconductor wafer process line. We report charge noise values below 2$,mathrmmu eV/sqrtHz$, spin relaxation times of over 1$,mathrmmu s$ and 50$,mathrmmu s$ respectively, for quantum wells grown using natural silicon.
  arXiv  Detail & Related papers  (2024-09-19T12:55:46Z)
• QuantumSEA: In-Time Sparse Exploration for Noise Adaptive Quantum Circuits [82.50620782471485]
  QuantumSEA is an in-time sparse exploration for noise-adaptive quantum circuits. It aims to achieve two key objectives: (1) implicit circuits capacity during training and (2) noise robustness. Our method establishes state-of-the-art results with only half the number of quantum gates and 2x time saving of circuit executions.
  arXiv  Detail & Related papers  (2024-01-10T22:33:00Z)
• Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99 % [0.0]
  Silicon-based spin qubits offer a potential pathway toward realizing a scalable quantum computer. Recent experiments have demonstrated crucial technologies, including high-fidelity quantum gates and multiqubit operation. The realization of a fault-tolerant quantum computer requires a high-fidelity spin measurement faster than decoherence.
  arXiv  Detail & Related papers  (2023-09-01T02:59:04Z)
• Database of semiconductor point-defect properties for applications in quantum technologies [54.17256385566032]
  We have calculated over 50,000 point defects in various semiconductors including diamond, silicon carbide, and silicon. We characterize the relevant optical and electronic properties of these defects, including formation energies, spin characteristics, transition dipole moments, zero-phonon lines. We find 2331 composite defects which are stable in intrinsic silicon, which are then filtered to identify many new optically bright telecom spin qubit candidates and single-photon sources.
  arXiv  Detail & Related papers  (2023-03-28T19:51:08Z)
• Modelling semiconductor spin qubits and their charge noise environment for quantum gate fidelity estimation [0.9406493726662083]
  The spin of an electron confined in semiconductor quantum dots is a promising candidate for quantum bit (qubit) implementations. We present here a co-modelling framework for double quantum dot (DQD) devices and their charge noise environment. We find an inverse correlation between quantum gate errors and quantum dot confinement.
  arXiv  Detail & Related papers  (2022-10-10T10:12:54Z)
• Field-deployable Quantum Memory for Quantum Networking [62.72060057360206]
  We present a quantum memory engineered to meet real-world deployment and scaling challenges. The memory technology utilizes a warm rubidium vapor as the storage medium, and operates at room temperature. We demonstrate performance specifications of high-fidelity retrieval (95%) and low operation error $(10-2)$ at a storage time of 160 $mu s$ for single-photon level quantum memory operations.
  arXiv  Detail & Related papers  (2022-05-26T00:33:13Z)
• Two-qubit silicon quantum processor with operation fidelity exceeding 99% [0.0]
  Two qubit Si/SiGe quantum processor demonstrated state preparation and readout with fidelity over 97%. Results highlight the potential of silicon spin qubits to become a dominant technology in the development of intermediate-scale quantum processors.
  arXiv  Detail & Related papers  (2021-11-23T15:15:59Z)
• Precision tomography of a three-qubit donor quantum processor in silicon [38.42250061908039]
  Nuclear spins were among the first physical platforms to be considered for quantum information processing. We demonstrate universal quantum logic operations using a pair of ion-implanted 31P donor nuclei in a silicon nanoelectronic device.
  arXiv  Detail & Related papers  (2021-06-06T10:30:38Z)
• Quantum Phases of Matter on a 256-Atom Programmable Quantum Simulator [41.74498230885008]
  We demonstrate a programmable quantum simulator based on deterministically prepared two-dimensional arrays of neutral atoms. We benchmark the system by creating and characterizing high-fidelity antiferromagnetically ordered states. We then create and study several new quantum phases that arise from the interplay between interactions and coherent laser excitation.
  arXiv  Detail & Related papers  (2020-12-22T19:00:04Z)
• Millikelvin temperature cryo-CMOS multiplexer for scalable quantum device characterisation [44.07593636917153]
  Quantum computers based on solid state qubits have been a subject of rapid development in recent years. Currently, each quantum device is controlled and characterised though a dedicated signal line between room temperature and base temperature of a dilution refrigerator. This approach is not scalable and is currently limiting the development of large-scale quantum system integration and quantum device characterisation.
  arXiv  Detail & Related papers  (2020-11-23T16:22:15Z)

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.