18-Qubit Entanglement with Six Photons’ Three Degrees of Freedom

Wang, Xiaohao; Luo, Yi-Han; Huang, He-Liang; Chen, Ming-Cheng; Su, Zu-En; Liu, Chang; Chen, Chao; Li, Wei; Fang, Yuqiang; Jiang, Xiao; Zhang, Jun; Li, Li; Liu, Nai-Le; Lu, Chao‐Yang; Pan, Jian-Wei

doi:10.1103/physrevlett.120.260502

Cited by 367 publications

(240 citation statements)

References 43 publications

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“…A great advantage of optical quantum computing is that it does not have to be confined to qubits: many of the degrees of freedom listed provide a natural way to encode multilevel qudits. Moreover, several degrees of freedom of the same photon can be used simultaneously [28][29][30][31][32] . (As we will discuss later, these tools provide a natural advantage for optics, allowing for simpler logical circuits even when working with qubits as the basic logical elements.)…”

Section: Basicsmentioning

confidence: 99%

Photonic quantum information processing: A concise review

Slussarenko

Pryde

2019

Applied Physics Reviews

484

308

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Photons have been a flagship system for studying quantum mechanics, advancing quantum information science, and developing quantum technologies. Quantum entanglement, teleportation, quantum key distribution and early quantum computing demonstrations were pioneered in this technology because photons represent a naturally mobile and low-noise system with quantum-limited detection readily available. The quantum states of individual photons can be manipulated with very high precision using interferometry, an experimental staple that has been under continuous development since the 19th century. The complexity of photonic quantum computing device and protocol realizations has raced ahead as both underlying technologies and theoretical schemes have continued to develop. Today, photonic quantum computing represents an exciting path to medium-and large-scale processing. It promises to out aside its reputation for requiring excessive resource overheads due to inefficient two-qubit gates. Instead, the ability to generate large numbers of photons-and the development of integrated platforms, improved sources and detectors, novel noise-tolerant theoretical approaches, and more-have solidified it as a leading contender for both quantum information processing and quantum networking. Our concise review provides a flyover of some key aspects of the field, with a focus on experiment. Apart from being a short and accessible introduction, its many references to in-depth articles and longer specialist reviews serve as a launching point for deeper study of the field. CONTENTS arXiv:1907.06331v1 [quant-ph]

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Section: Basicsmentioning

confidence: 99%

Photonic quantum information processing: A concise review

Slussarenko

Pryde

2019

Applied Physics Reviews

484

308

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“…The expression given by (12) describes the one-dimensional quantum Haar transform (1D-QHT). In our work, we have generalized the Haar wavelet function by quantum operations using n qubits, and a d-dimensional kernel operation.…”

Section: Quantum Wavelet Transformmentioning

confidence: 99%

Scaling reconfigurable emulation of quantum algorithms at high precision and high throughput

El-Araby

Caliga

2019

Quantum Engineering

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Summary The general approach for emulating quantum algorithms on classical platforms has been through representing them as gate‐based quantum circuits. However, direct implementation of quantum circuits significantly increases the hardware resource utilization and system latency of classical emulators. In this paper, we investigate multiple implementation models alternative to conventional emulation approaches, as feasible solutions to the scalability problem in classical emulation of quantum circuits. In the first model, the quantum circuit functionality is reduced to equivalent, arithmetic (multiply‐and‐accumulate) operations and combined with two computation methods, based on lookup and dynamic generation. In the second model, a kernel operation is extracted from the quantum circuit based on its functionality, and the kernel is iterated through all input quantum states. The proposed emulation models provide space and time optimizations, significantly reducing resource utilizations and latencies and improving scalability. We use these models to develop a highly scalable hardware emulator that is based on reconfigurable technology for efficient simulations of full quantum algorithms and circuits. Our hardware implementations support single precision floating point arithmetic for improved accuracy, and contain fully pipelined designs for high throughput. We investigate quantum algorithms such as quantum Fourier transform and quantum wavelet transform and explore different hardware architectures and optimizations. Experimental results and analysis are provided for the architectures in terms of resource consumption and emulation time. The experiments are carried out on a high‐performance reconfigurable computing system and the obtained results show that the proposed emulator is feasible for running and testing a variety of quantum algorithms.

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“…Hence, it is essential to experimentally prepare the genuine entanglement of as many qubits as possible. So far, genuine multipartite entangled (GME) states in the form of Greenberger-Horne-Zeilinger (GHZ) states have been reported with 10 superconducting qubits, 14 trapped ions, and 18 photonic qubits [12][13][14]. Recently M. Gong et alhave realized the creation and verification of a 12-qubit linear cluster (LC) state, the largest GME state reported in solid-state quantum systems [15].…”

mentioning

confidence: 99%

Construction of genuine multipartite entangled states

Chen

2020

J. Phys. A: Math. Theor.

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Genuine multipartite entanglement is of great importance in quantum information, especially from the experimental point of view. Nevertheless, it is difficult to construct genuine multipartite entangled states systematically, because the genuine multipartite entanglement is unruly. We propose another product based on the Kronecker product in this paper. The Kronecker product is a common product in quantum information with good physical interpretation. We mainly investigate whether the proposed product of two genuine multipartite entangled states is still a genuine entangled one. We understand the entanglement of the proposed product better by characterizing the entanglement of the Kronecker product. Then we show the proposed product is a genuine multipartite entangled state in two cases. The results provide a systematical method to construct genuine multipartite entangled states of more parties. Contents

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18-Qubit Entanglement with Six Photons’ Three Degrees of Freedom

Cited by 367 publications

References 43 publications

Photonic quantum information processing: A concise review

Photonic quantum information processing: A concise review

Scaling reconfigurable emulation of quantum algorithms at high precision and high throughput

Construction of genuine multipartite entangled states

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