H2020Индивидуална стипендия2016–2018

NAMESTRANSIS · Nanomechanical spin-to-photon transduction in silicon

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

Период: 2016-03-01 → 2018-02-28
Финансиране от ЕС: 165 599 €
Участници: 1
Схема: MSCA-IF-EF-RI

Линиите свързват координатора с партньорите.

Накратко на български

Силициеви наноструктури се изследват, за да се превърне спинът на електрона в светлинен сигнал (фотон). Това помага за създаването на по-ефективни методи за четене и управление на данни в бъдещите квантови компютри.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Nanomechanical spin-to-photon transduction in silicon

Silicon has been the material underpinning the modern information technology (IT) revolution. It has recently been discovered that it could very well be the most important material for the upcoming quantum IT age as well. Using the spin of an electron trapped in the binding potential of a phosphorous donor as a qubit, the funded fellow and co-workers at UNSW Australia in 2014 demonstrated the longest quantum coherence times ever seen in solid state (apart from nuclear spin ensembles). Combined with also demonstrated high-fidelity quantum coherent control and the possibility of leveraging the huge manufacturing capabilities of the current semiconductor industry, silicon is now seen as one of the most promising materials for building a universal quantum computer. A crucial challenge ahead for donor qubits is the realization of suitable coupling and readout mechanisms. The natural way to couple donor spin qubits via the exchange interaction will require placement of the donors with an atomic accuracy that is not achievable in current fabrication processes. Current readout techniques rely on energy dependent tunnelling to an electron reservoir, for which high magnetic fields and millikelvin electron temperatures are needed. A coupling principle that alleviates these limiting requirements would provide a defining advantage, leveraging the application potential of silicon for quantum applications. In this project our objectives were to study a new readout and coupling mechanism for the donor qubits, based on nano-optomechanical structures. For this purpose optomechanical photonic crystal structures were developed further to maximize the photon-phonon coupling strengths and to demonstrate measurement and control of the mechanical degree of freedom close to the quantum level using pulsed measurements. Then spins were embedded to the structures in order to make proof-of-principle measurements on the spin-mechanics-light coupling.

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

Цел на проекта

The spin of an electron trapped in the binding potential of a phosphorous donor has recently shown some of the longest quantum coherence times in solid state and is now regarded as one of the most promising materials for quantum computing. However, current readout techniques rely on single-electron transistors for which millikelvin temperatures and nanoelectronic connections are needed. We propose to establish a new transduction mechanism that coherently couples silicon spin qubits to optical photons at the quantum level and hence provides optical addressing at 4K temperatures. Central to our proposed quantum transducer is a nanomechanical resonator, that acts as a conduit of quantum information. We will realize sufficiently strong interactions between the resonator and both spins and photons by exploiting nanophotonic systems, which can confine light fields and mechanical motion at the nanoscale. Our objectives are to show: (i) coupling between the spin and the mechanics by inducing spin-dependent mechanical frequency shift and read this out optically, and (ii) pulsed backaction-evading measurements of nanomechanical motion, establishing a fast single-shot qubit readout method, and allowing the creation of non-classical mechanical states through projective measurement. Doing this we create a unique three-way hybrid quantum system: spin qubit–mechanical resonator–optical cavity. The study of this new “spin-optomechanics” system is expected to both contribute to the exploration of the size-frontiers of quantum mechanics and lead to advancements in the field of quantum computation as well as ultra-sensitive magnetometry. The project allows the applicant to gain crucial expertise in nano-optomechanics and nanophotonics. Combined with his previous experience on spin qubits, the proposed research and the excellent scientific host environment will arm him with a unique skill set that will position him well for a future research position in Europe.

Оригинален текст от CORDIS (на английски).

Участници

STICHTING NEDERLANDSE WETENSCHAPPELIJK ONDERZOEK INSTITUTEN · UtrechtКоординаторНидерландия