Preparing multipartite entangled spin qubits via pauli spin blockade

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Tarih

2020-02-26

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Nature Research

Erişim Hakkı

info:eu-repo/semantics/openAccess

Araştırma projeleri

Organizasyon Birimleri

Dergi sayısı

Özet

Preparing large-scale multi-partite entangled states of quantum bits in each physical form such as photons, atoms or electrons for each specific application area is a fundamental issue in quantum science and technologies. Here, we propose a setup based on Pauli spin blockade (PSB) for the preparation of large-scale W states of electrons in a double quantum dot (DQD). Within the proposed scheme, two W states of n and m electrons respectively can be fused by allowing each W state to transfer a single electron to each quantum dot. The presence or absence of PSB then determines whether the two states have fused or not, leading to the creation of a W state of n + m ? 2 electrons in the successful case. Contrary to previous works based on quantum dots or nitrogen-vacancy centers in diamond, our proposal does not require any photon assistance. Therefore the ‘complex’ integration and tuning of an optical cavity is not a necessary prerequisite. We also show how to improve the success rate in our setup. Because requirements are based on currently available technology and well-known sensing techniques, our scheme can directly contribute to the advances in quantum technologies and, in particular in solid state systems.

Açıklama

Anahtar Kelimeler

Charge noise, Semiconductor quantum dots, Quantum dots

Kaynak

Scientific Reports

WoS Q Değeri

Q2
Q2

Scopus Q Değeri

Q1

Cilt

10

Sayı

1

Künye

Buğu, S., Özaydın, F., Ferrus, T. & Kodera, T. (2020). Preparing multipartite entangled spin qubits via pauli spin blockade. Scientific Reports, 10(1), 1-8. doi:10.1038/s41598-020-60299-6