H2020Индивидуална стипендия2021–2023

CNTQUBIT · Carbon nanotube based nanomechanical qubit

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-04-01 → 2023-03-31
Финансиране от ЕС: 160 932 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Въглеродните нанотръби се изследват като основа за нов вид квантов бит, при който механичните вибрации на тръбата се свързват с един затворен електрон. Това може да помогне за създаването на по-ефективни квантови компютри, които да се справят с проблеми като климатичните промени.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Carbon nanotube based nanomechanical qubit

Many modern challenges such as climate change and food security are difficult to address using classical computing. Quantum computers are expected to fare much better, because their fundamental computing unit, the quantum bit (qubit) can utilize quantum properties such as entanglement. These qubits are in practice realized on a specific hardware platform, but so far, no particular architecture has demonstrated superiority. This project sought to demonstrate a fundamentally new type of platform to host such qubits. The qubit is realized with a carbon nanotube (CNT) whose mechanical vibrations are coupled to an embedded and trapped electron. The first objective was to demonstrate the interplay between the vibrations and the electron, whilst the second was to utilize this coupling for the formation of a qubit. The image shows a scanning electron micrograph image of our platform. The carbon nanotube is indicated by the red arrows are grows from catalyst nanoparticles in the blue regions. The electron is confined along the suspended nanotube in the small region indicated by the dashed yellow rectangle by applying voltages to the electrodes highlighted in red.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

This proposal outlines our vision for generating the first mechanical quantum bit (qubit) ever produced. The qubit will be realized with a carbon nanotube (CNT) in two steps. First, a carbon nanotube mechanical resonator is prepared in its quantum ground state and strongly coupled to an embedded electronic two-level system (eTLS). The eTLS is realized by carefully tuning the energy states of two spatially distinct charge quantum dots until they hybridize. This double quantum dot is hosted along the suspended carbon nanotube and localized such that it couples strongly to a high mechanical quality factor vibrational mode. Secondly, the strong coupling between the emergent eTLS and the CNT mechanical mode enables a tunable and strong anharmonicity in the mechanical restoring potential. This anharmonicity makes it possible to use the system as a qubit, which will be realized by integrating the nano-electromechanical (NEMS) device with a superconducting microwave cavity. This allows for the mechanical qubit to be coherently addressed and sensitively read-out using the state-dependent frequency shift imparted by the qubit on the superconducting cavity.

Оригинален текст от CORDIS (на английски).

Участници

FUNDACIO INSTITUT DE CIENCIES FOTONIQUES · CastelldefelsКоординаторИспания