Elizaveta Morozova

Delft University of Technology

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Amir Sammak

Netherlands Organisation for Applied Scientific Research

Menno Veldhorst

Delft University of Technology

Stefan D. Oosterhout

Netherlands Organisation for Applied Scientific Research

Giordano Scappucci

Delft University of Technology

Maximilian Russ

QuTech

Tzu-Kan Hsiao

National Tsing Hua University

Xin Zhang

Hangzhou Special Equipment Inspection and Research Institute

L. M. K. Vandersypen

QuTech

Chien-An Wang

Delft University of Technology

Daniel Jirovec

Delft University of Technology

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Delft University of Technology

QuTech

Kavli Energy NanoScience Institute

Netherlands Organisation for Applied Scientific Research

Kabardino-Balkarian State University

Intel (United States)

UNSW Sydney

Centre for Quantum Computation and Communication Technology

Australian Research Council

Stanford University

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Creating visual guidelines for a Finnish fashion brand

Elizaveta Morozova

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Universal control of four singlet-triplet qubits

Research Square (Research Square) (2024)

L. M. K. Vandersypen Xin Zhang Elizaveta Morozova Maximilian Russ Daniel Jirovec

Abstract The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing as well as for studying quantum magnetism from the bottom up. On paper, individual spin-spin couplings can be independently controlled through gate voltages, but nonlinearities and crosstalk introduce significant complexity that has slowed down progress in past years. Here, we present a 2×4 germanium quantum dot array with full and controllable interactions between nearest-neighbor spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs. Combining these operations, we experimentally implement a circuit designed to generate and distribute entanglement across the array. These results highlight the potential of singlet-triplet qubits as a competing platform for quantum computing and indicate that scaling up the control of quantum dot spins in extended bilinear arrays can be feasible.

10.21203/rs.3.rs-3820596/v1

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Dataset underlying the manuscript: Universal control of four singlet-triplet qubits

Zenodo (CERN European Organization for Nuclear Research) (2023)

Xin Zhang Elizaveta Morozova Maximilian Russ Daniel Jirovec Tzu-Kan Hsiao

Original dataset for the paper "Universal control of four singlet-triplet qubits" by Xin Zhang et al (https://arxiv.org/abs/2312.16101).

Singlet fission

10.5281/zenodo.10431401

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THE 18TH CENTURY GLAZED AND TERRACOTTA FROM THE COLLECTION OF THE TOTMA MUSEUM ASSOCIATION: FIRST RESULTS OF THE TECHNOLOGICAL STUDY

Y.Y. Lisenkova Raisa V. Lobzova Л. О. Магазина Elizaveta Morozova

Terracotta

Association (psychology)

10.30695/zrmo/2023.114

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Universal control of four singlet–triplet qubits

Nature Nanotechnology (2024)

Xin Zhang Elizaveta Morozova Maximilian Russ Daniel Jirovec Tzu-Kan Hsiao

Abstract The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and controllable interactions between nearest-neighbour spins. As a demonstration of the level of control, we define four singlet–triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs, yielding average single-qubit gate fidelities of 99.49(8)–99.84(1)% and Bell state fidelities of 73(1)–90(1)%. Combining these operations, we experimentally implement a circuit designed to generate and distribute entanglement across the array. A remote Bell state with a fidelity of 75(2)% and concurrence of 22(4)% is achieved. These results highlight the potential of singlet–triplet qubits as a competing platform for quantum computing and indicate that scaling up the control of quantum dot spins in extended bilinear arrays can be feasible.

10.1038/s41565-024-01817-9

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Dataset underlying the manuscript: Universal control of four singlet-triplet qubits

Zenodo (CERN European Organization for Nuclear Research) (2023)

Xin Zhang Elizaveta Morozova Maximilian Russ Daniel Jirovec Tzu-Kan Hsiao

Original dataset for the paper "Universal control of four singlet-triplet qubits" by Xin Zhang et al (https://arxiv.org/abs/2312.16101).

10.5281/zenodo.10431402

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Phytochemical composition of the underground part of Paeonia tenuifolia L. and leaves of Petrocoma hoefftiana (Fisch.) Rupr.

E3S Web of Conferences (2023)

V. A. Kvashin Zukhra Tsakhkhaeva Марина Анатольевна Шамарина Anna Toguzova Elizaveta Morozova

The phytochemical composition of plants is very diverse and includes many biologically active substances, and their combination determines the pharmacological activity. This article examines the phytochemical composition of the underground part of Paeonia tenuifolia L. and leaves of Petrocoma hoefftiana (Fisch.) Rupr. It was found that the studied objects contain glycyrrhizic acid, peucedanin, flavonoids, phloroglucides, tannins, ascorbic acid. The studied plants can be considered as a new type of plant raw materials, promising for further study.

Phytochemical

10.1051/e3sconf/202341102034

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Universal control of four singlet-triplet qubits

arXiv (Cornell University) (2023)

Xin Zhang Elizaveta Morozova Maximilian Russ Daniel Jirovec Tzu-Kan Hsiao

The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing as well as for studying quantum magnetism from the bottom up. On paper, individual spin-spin couplings can be independently controlled through gate voltages, but nonlinearities and crosstalk introduce significant complexity that has slowed down progress in past years. Here, we present a $2\times4$ germanium quantum dot array with full and controllable interactions between nearest-neighbor spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of all qubits and SWAP-style two-qubit gates between all neighbouring qubit pairs. Combining these operations, we experimentally implement a circuit designed to generate and distribute entanglement across the array. These results highlight the potential of singlet-triplet qubits as a competing platform for quantum computing and indicate that scaling up the control of quantum dot spins in extended bilinear arrays can be feasible.

10.48550/arxiv.2312.16101

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Citations (3)