Realization of Universal Quantum Gates with Spin‐Qudits in Colloidal Quantum Dots

Moro, Fabrizio; Fielding, Alistair J.; Turyanska, Lyudmila; Patanè, A.

doi:10.1002/qute.201900017

Cited by 11 publications

(10 citation statements)

References 55 publications

(70 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Incorporation of magnetic ions in colloidal nanocrystals (NCs) opens exciting opportunities for the engineering of spintronics devices. − The underlying idea to exploit the strong sp–d exchange interactions of electrons and holes with the localized spins of magnetic ions originates from the physics of diluted magnetic semiconductors (DMSs) . This research direction was established first for bulk DMS materials and later was successfully extended for epitaxially grown DMS heterostructures, including quantum wells and quantum dots. , In colloidal nanostructures, it is still at an early stage, while several important results have been already achieved.…”

mentioning

confidence: 99%

Magneto-Optics of Excitons Interacting with Magnetic Ions in CdSe/CdMnS Colloidal Nanoplatelets

et al. 2020

View full text Add to dashboard Cite

Excitons in diluted magnetic semiconductors represent excellent probes for studying the magnetic properties of these materials. Various magneto-optical effects, which depend sensitively on the exchange interaction of the excitons with the localized spins of the magnetic ions can be used for probing. Here, we study core/shell CdSe/(Cd,Mn)S colloidal nanoplatelets hosting diluted magnetic semiconductor layers. The inclusion of the magnetic Mn 2+ ions is evidenced by three magneto-optical techniques using high magnetic fields up to 15 T: polarized photoluminescence, optically detected magnetic resonance, and spin-flip Raman scattering. We show that the holes in the excitons play the dominant role in exchange interaction with magnetic ions. We suggest and test an approach for evaluation of the Mn 2+ concentration based on the spin− lattice relaxation dynamics of the Mn 2+ spin system.

show abstract

mentioning

confidence: 99%

Magneto-Optics of Excitons Interacting with Magnetic Ions in CdSe/CdMnS Colloidal Nanoplatelets

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Using electron double resonancedetected nuclear magnetic resonance (EDNMR), coherent manipulation of Mn 2+ qudits between various states was demonstrated. Coherence times of approximately 8 𝜇𝜇𝑠𝑠 were shown, with 𝜋𝜋/2 pulse times of approximately 24 ns [302] .…”

Section: Magnetic Dopants In Ii-vi Qdsmentioning

confidence: 96%

Nanomaterials for Quantum Information Science and Engineering

et al. 2022

View full text Add to dashboard Cite

Quantum information science and engineering (QISE) which entails generation, control and manipulation of individual quantum mechanical states together with nanotechnology have dominated condensed matter physics and materials science research in the 21st century. Solid state devices for QISE have, to this point, predominantly been designed with bulk material as their constituents. In this review, we consider how nanomaterials or low-dimensional materials i.e. materials with intrinsic quantum confinement -may offer inherent advantages over conventional materials for QISE. We identify the materials challenges for specific types of qubits, and we identify how emerging nanomaterials may overcome these challenges. Challenges for and progress towards nanomaterials-based quantum devices are identified. We aim to help close the gap between the nanotechnology and quantum information communities and inspire research that will lead to next-generation quantum devices for scalable and practical quantum applications.

show abstract

“…Previous efforts have synthesized the motivations for pursuing qudit-based computation and described possible experimental toolkits [8,[13][14][15], while other efforts have implemented limited amounts of control over three-level trappedion qudits (i.e., qutrits) [16][17][18]. Platforms other than trapped ions have also been considered as qudits [19][20][21][22][23][24][25][26][27]. In trapped ions, most proposals for two-qudit gates have utilized the Cirac-Zoller [28] entangling scheme, which has been found to be less practical than the Mølmer-Sørensen (MS) scheme [29].…”

Section: Introductionmentioning

confidence: 99%

Practical trapped-ion protocols for universal qudit-based quantum computing

Low

White

Cox

et al. 2020

Phys. Rev. Research

100

View full text Add to dashboard Cite

The notion of universal quantum computation can be generalized to multilevel qudits, which offer advantages in resource usage and algorithmic efficiencies. Trapped ions, which are pristine and well-controlled quantum systems, offer an ideal platform to develop qudit-based quantum information processing. Previous work has not fully explored the practicality of implementing trapped-ion qudits accounting for known experimental error sources. Here, we describe a universal set of protocols for state preparation, single-qudit gates, a generalization of the Mølmer-Sørensen gate for two-qudit gates, and a measurement scheme which utilizes shelving to a metastable state. We numerically simulate known sources of error from previous trapped-ion experiments, and show that there are no fundamental limitations to achieving fidelities above 99% for three-level qudits encoded in 137 Ba + ions. Our methods are extensible to higher-dimensional qudits, and our measurement and single-qudit gate protocols can achieve 99% fidelities for five-level qudits. We identify avenues to further decrease errors in future work. Our results suggest that three-level trapped-ion qudits will be a useful technology for quantum information processing.

show abstract

Realization of Universal Quantum Gates with Spin‐Qudits in Colloidal Quantum Dots

Cited by 11 publications

References 55 publications

Magneto-Optics of Excitons Interacting with Magnetic Ions in CdSe/CdMnS Colloidal Nanoplatelets

Magneto-Optics of Excitons Interacting with Magnetic Ions in CdSe/CdMnS Colloidal Nanoplatelets

Nanomaterials for Quantum Information Science and Engineering

Practical trapped-ion protocols for universal qudit-based quantum computing

Contact Info

Product

Resources

About