Resource-efficient high-dimensional subspace teleportation with a quantum autoencoder DOI Creative Commons
Hui Zhang, Lingxiao Wan, Tobias Haug

et al.

Science Advances, Journal Year: 2022, Volume and Issue: 8(40)

Published: Oct. 7, 2022

Quantum autoencoders serve as efficient means for quantum data compression. Here, we propose and demonstrate their use to reduce resource costs teleportation of subspaces in high-dimensional systems. We a autoencoder compress-teleport-decompress manner report the first demonstration with qutrits using an integrated photonic platform future scalability. The key strategy is compress dimensionality input states by erasing redundant information recover initial after chip-to-chip teleportation. Unsupervised machine learning applied train on-chip autoencoder, enabling compression any state from subspace. Unknown are decompressed at high fidelity (~0.971), obtaining total ~0.894. Subspace encodings hold great potential they support enhanced noise robustness increased coherence. Laying groundwork techniques systems, our scheme opens previously unidentified paths toward computing networking.

Language: Английский

Towards higher-dimensional structured light DOI Creative Commons
Chao He, Yijie Shen, Andrew Forbes

et al.

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: July 5, 2022

Structured light refers to the arbitrarily tailoring of optical fields in all their degrees freedom (DoFs), from spatial temporal. Although orbital angular momentum (OAM) is perhaps most topical example, and celebrating 30 years since its connection structure light, control over other DoFs slowly gaining traction, promising access higher-dimensional forms structured light. Nevertheless, harnessing these new quantum classical states remains challenging, with toolkit still infancy. In this perspective, we discuss methods, challenges, opportunities for creation, detection, multiple We present a roadmap future development trends, fundamental research applications, concentrating on potential larger-capacity, higher-security information processing communication, beyond.

Language: Английский

Citations

350
One-step quantum secure direct communication DOI
Yu‐Bo Sheng, Lan Zhou, Gui‐Lu Long

et al.

Science Bulletin, Journal Year: 2021, Volume and Issue: 67(4), P. 367 - 374

Published: Nov. 4, 2021

Language: Английский

Citations

274
Long-Distance Entanglement Purification for Quantum Communication DOI
Xiao‐Min Hu,

Cen-Xiao Huang,

Yu‐Bo Sheng

et al.

Physical Review Letters, Journal Year: 2021, Volume and Issue: 126(1)

Published: Jan. 8, 2021

High-quality long-distance entanglement is essential for both quantum communication and scalable networks. Entanglement purification to distill high-quality from low-quality in a noisy environment it plays key role repeaters. The previous significant experiments require two pairs of entangled states were demonstrated table-top. Here we propose report high-efficiency using only one pair hyperentangled states. We also demonstrate its practical application entanglement-based distribution (QKD). One polarization spatial-mode hyperentanglement was distributed over 11 km multicore fiber (noisy channel). After purification, the fidelity arises 0.771 0.887 effective rate QKD increases 0 0.332. values Clauser-Horne-Shimony-Holt (CHSH) inequality 1.829 2.128. Moreover, by deterministic controlled-NOT gate, total efficiency can be estimated as 6.6x10^3 times than experiment with spontaneous parametric down-conversion (SPDC) sources. Our results offer potential implemented part full repeater large scale network.

Language: Английский

Citations

202
A programmable qudit-based quantum processor DOI Creative Commons

Yulin Chi,

Jieshan Huang,

Zhanchuan Zhang

et al.

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 4, 2022

Abstract Controlling and programming quantum devices to process information by the unit of dit, i.e., qudit, provides possibilities for noise-resilient communications, delicate molecular simulations, efficient computations, showing great potential enhance capabilities qubit-based technologies. Here, we report a programmable qudit-based processor in silicon-photonic integrated circuits demonstrate its enhancement computational parallelism. The monolithically integrates all key functionalities initialisation, manipulation, measurement two quart (ququart) states multi-value quantum-controlled logic gates with high-level fidelities. By reprogramming configuration processor, implemented most basic Fourier transform algorithms, quaternary, benchmark parallelism using qudits, which include generalised Deutsch-Jozsa Bernstein-Vazirani quaternary phase estimation fast factorization algorithms. monolithic integration high programmability have allowed implementations more than one million high-fidelity preparations, operations projections qudit processor. Our work shows an photonic technology computing enhanced capacity, accuracy, efficiency, could lead acceleration building large-scale computer.

Language: Английский

Citations

180
Quantum repeaters: From quantum networks to the quantum internet DOI
Koji Azuma, Sophia E. Economou, David Elkouss

et al.

Reviews of Modern Physics, Journal Year: 2023, Volume and Issue: 95(4)

Published: Dec. 20, 2023

Quantum technology is now at a point where practical work can begin on creating the quantum internet. However, numerous challenges must be overcome before this vision becomes reality. A global-scale internet requires development of repeater, device that stores and manipulates qubits while interacting with or emitting entangled photons. This review examines different approaches to repeaters networks, covering their conceptual frameworks, architectures, current progress in experimental implementation.

Language: Английский

Citations

162
Qutrit Randomized Benchmarking DOI
Alexis Morvan, Vinay Ramasesh, Machiel Blok

et al.

Physical Review Letters, Journal Year: 2021, Volume and Issue: 126(21)

Published: May 27, 2021

Ternary quantum processors offer significant potential computational advantages over conventional qubit technologies, leveraging the encoding and processing of information in qutrits (three-level systems). To evaluate compare performance such emerging hardware it is essential to have robust benchmarking methods suitable for a higher-dimensional Hilbert space. We demonstrate extensions industry standard randomized (RB) protocols, developed used extensively qubits, ternary logic. Using superconducting five-qutrit processor, we find an average single-qutrit process infidelity $3.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$. Through interleaved RB, characterize few relevant gates, employ simultaneous RB fully crosstalk errors. Finally, apply cycle two-qutrit CSUM gate obtain fidelity 0.85. Our results present RB-based tools qutrit general approach diagnose control errors future qudit hardware.

Language: Английский

Citations

107
Progress in quantum teleportation DOI
Xiao‐Min Hu, Yu Guo, Bi‐Heng Liu

et al.

Nature Reviews Physics, Journal Year: 2023, Volume and Issue: 5(6), P. 339 - 353

Published: May 24, 2023

Language: Английский

Citations

102
Quantum structured light in high dimensions DOI Creative Commons
Isaac Nape, Bereneice Sephton, Pedro Ornelas

et al.

APL Photonics, Journal Year: 2023, Volume and Issue: 8(5)

Published: May 1, 2023

Structured light has become topical of late, where controlling in all its degrees freedom offered novel states long predicted, enhanced functionality applications, and a modern toolbox for probing fundamental science. Structuring as single photons entangled allows the spatial modes to be used encode large alphabet, accessing high dimensional Hilbert spaces tests quantum mechanics improved information processing tasks. In this tutorial, we outline basic concepts expressed basis (structured light) explain how create, control, detect such laboratory with focus on transverse orbital angular momentum pixel (position) modes. Finally, highlight some example applications structured light, from communications imaging.

Language: Английский

Citations

44
Entanglement-Assisted Quantum Networks: Mechanics, Enabling Technologies, Challenges, and Research Directions DOI
Zhonghui Li, Kaiping Xue, Jian Li

et al.

IEEE Communications Surveys & Tutorials, Journal Year: 2023, Volume and Issue: 25(4), P. 2133 - 2189

Published: Jan. 1, 2023

Over the past few decades, significant progress has been made in quantum information technology, from theoretical studies to experimental demonstrations. Revolutionary applications are now limelight, showcasing advantages of technology and becoming a research hotspot academia industry. To enable have more profound impact wider application, interconnection multiple nodes through channels becomes essential. Building an entanglement-assisted network, capable realizing transmission between these nodes, is primary goal. However, networks governed by unique laws mechanics, such as superposition principle, no-cloning theorem, entanglement, setting them apart classical networks. Consequently, fundamental efforts required establish While some insightful surveys paved way for networks, most focus on enabling technologies applications, neglecting critical network issues. In response, this paper presents comprehensive survey Alongside reviewing mechanics technologies, provides detailed overview structure, working principles, development stages, highlighting differences Additionally, challenges building wide-area addressed. Furthermore, emphasizes open directions, including architecture design, entanglement-based issues, standardization, facilitate implementation future

Language: Английский

Citations

40
Two-Qutrit Quantum Algorithms on a Programmable Superconducting Processor DOI
Tanay Roy, Ziqian Li, Eliot Kapit

et al.

Physical Review Applied, Journal Year: 2023, Volume and Issue: 19(6)

Published: June 7, 2023

Processing quantum information using three-level systems or qutrits as the fundamental unit is an alternative to contemporary qubit-based architectures with potential provide significant computational advantages. We demonstrate a fully programmable two-qutrit processor by utilizing third energy eigenstates of two transmons. develop parametric coupler achieve excellent connectivity in nine-dimensional Hilbert space enabling efficient implementations gates. characterize our realizing several algorithms like Deutsch-Jozsa, Bernstein-Vazirani, and Grover's search. Our hardware-efficient protocols allow us show that stages amplification can improve success rates unstructured search advantage. results pave way for building ternary processors transmons blocks universal computer.

Language: Английский

Citations

29