Shared control of a 16 semiconductor quantum dot crossbar array

• URL: http://arxiv.org/abs/2209.06609v1
• Date: Wed, 14 Sep 2022 12:59:50 GMT
• Title: Shared control of a 16 semiconductor quantum dot crossbar array
• Authors: Francesco Borsoi, Nico W. Hendrickx, Valentin John, Sayr Motz, Floor van Riggelen, Amir Sammak, Sander L. de Snoo, Giordano Scappucci, Menno Veldhorst
• Abstract summary: We introduce the shared control of semiconductor quantum dots to efficiently operate a two-dimensional crossbar array in planar germanium. We establish a method for the selective control of the quantum dots interdot coupling and achieve a tunnel coupling tunability over more than 10 GHz.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The efficient control of a large number of qubits is one of most challenging aspects for practical quantum computing. Current approaches in solid-state quantum technology are based on brute-force methods, where each and every qubit requires at least one unique control line, an approach that will become unsustainable when scaling to the required millions of qubits. Here, inspired by random access architectures in classical electronics, we introduce the shared control of semiconductor quantum dots to efficiently operate a two-dimensional crossbar array in planar germanium. We tune the entire array, comprising 16 quantum dots, to the few-hole regime and, to isolate an unpaired spin per dot, we confine an odd number of holes in each site. Moving forward, we establish a method for the selective control of the quantum dots interdot coupling and achieve a tunnel coupling tunability over more than 10 GHz. The operation of a quantum electronic device with fewer control terminals than tunable experimental parameters represents a compelling step forward in the construction of scalable quantum technology.

Related papers

• A fiber array architecture for atom quantum computing [29.574286367992432]
  We propose a fiber array architecture for atom quantum computing capable of fully independent control of individual atoms. We experimentally demonstrate the trapping and independent control of ten single atoms in two-dimensional optical tweezers. Our work paves the way for time-efficient execution of quantum algorithms on neutral atom quantum computers.
  arXiv  Detail & Related papers  (2024-11-13T10:39:41Z)
• The multimode conditional quantum Entropy Power Inequality and the squashed entanglement of the extreme multimode bosonic Gaussian channels [53.253900735220796]
  Inequality determines the minimum conditional von Neumann entropy of the output of the most general linear mixing of bosonic quantum modes. Bosonic quantum systems constitute the mathematical model for the electromagnetic radiation in the quantum regime.
  arXiv  Detail & Related papers  (2024-10-18T13:59:50Z)
• A Quantum-Classical Collaborative Training Architecture Based on Quantum State Fidelity [50.387179833629254]
  We introduce a collaborative classical-quantum architecture called co-TenQu. Co-TenQu enhances a classical deep neural network by up to 41.72% in a fair setting. It outperforms other quantum-based methods by up to 1.9 times and achieves similar accuracy while utilizing 70.59% fewer qubits.
  arXiv  Detail & Related papers  (2024-02-23T14:09:41Z)
• Universal control of four singlet-triplet qubits [1.3796774399389324]
  coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing. We present a $2times4$ germanium quantum dot array with full and controllable interactions between nearest-neighbor spins. Results highlight the potential of singlet-triplet qubits as a competing platform for quantum computing.
  arXiv  Detail & Related papers  (2023-12-26T16:07:13Z)
• Quantum Gate Optimization for Rydberg Architectures in the Weak-Coupling Limit [55.05109484230879]
  We demonstrate machine learning assisted design of a two-qubit gate in a Rydberg tweezer system. We generate optimal pulse sequences that implement a CNOT gate with high fidelity. We show that local control of single qubit operations is sufficient for performing quantum computation on a large array of atoms.
  arXiv  Detail & Related papers  (2023-06-14T18:24:51Z)
• A vertical gate-defined double quantum dot in a strained germanium double quantum well [48.7576911714538]
  Gate-defined quantum dots in silicon-germanium heterostructures have become a compelling platform for quantum computation and simulation. We demonstrate the operation of a gate-defined vertical double quantum dot in a strained germanium double quantum well. We discuss challenges and opportunities and outline potential applications in quantum computing and quantum simulation.
  arXiv  Detail & Related papers  (2023-05-23T13:42:36Z)
• A shuttling-based two-qubit logic gate for linking distant silicon quantum processors [0.0]
  Control of entanglement between qubits at distant quantum processors using a two-qubit gate is an essential function of a scalable, modular implementation of quantum computation. Here we demonstrate a two-qubit gate between spin qubits via coherent spin shuttling, a key technology for linking distant silicon quantum processors.
  arXiv  Detail & Related papers  (2022-02-03T01:04:48Z)
• Location qubits in a multi-quantum-dot system [0.0]
  We introduce novel location qubits, describe a method to construct a universal set of all-optical quantum gates, and simulate their performance in realistic structures. Our results show that location qubits can maintain coherence 5 orders of magnitude longer than single-qubit operation time, and single-qubit gate errors do not exceed 0.01%.
  arXiv  Detail & Related papers  (2021-07-13T10:00:16Z)
• Quantum control landscape for ultrafast generation of single-qubit phase shift quantum gates [68.8204255655161]
  We consider the problem of ultrafast controlled generation of single-qubit phase shift quantum gates. Globally optimal control is a control which realizes the gate with maximal possible fidelity. Trap is a control which is optimal only locally but not globally.
  arXiv  Detail & Related papers  (2021-04-26T16:38:43Z)
• Boundaries of quantum supremacy via random circuit sampling [69.16452769334367]
  Google's recent quantum supremacy experiment heralded a transition point where quantum computing performed a computational task, random circuit sampling. We examine the constraints of the observed quantum runtime advantage in a larger number of qubits and gates.
  arXiv  Detail & Related papers  (2020-05-05T20:11:53Z)
• Nonadiabatic geometric quantum computation with optimal control on superconducting circuits [7.703593898562321]
  We propose a nonadiabatic geometric quantum computation scheme on superconducting circuits. Our scheme provides a promising step towards fault-tolerant solid-state quantum computation.
  arXiv  Detail & Related papers  (2020-04-21T08:34:08Z)

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.