Generation of multiphoton entangled quantum states by means of integrated frequency combs

By C. Reimer, M. Kues, P. Roztocki, B. Wetzel, Fabio Grazioso, Brent E. Little, Sai T. Chu, T. Johnston, Y. Bromberg, L. Caspani and 2 more. Science, 2016

627 citations recorded by the source corpus.

Entangled frequency combs The ability to generate optical frequency combs in which the output light is made up of millions of sharp lines precisely spaced apart has been important for optical applications and for fundamental science. Reimer et al. now show that frequency combs can be taken into the quantum regime. They took individual teeth of the combs and quantum-mechanically entangled them to form complex optical states. Because the method is compatible with existing fiber and semiconductor technology, the results demonstrate a possible scalable and practical platform for quantum technologies. Science, this issue p. 1176 Optical frequency combs are taken into the quantum regime. [Also see Perspective by Peacock and Steel] Complex optical photon states with entanglement shared among several modes are critical to improving our fundamental understanding of quantum mechanics and have applications for quantum information processing, imaging, and microscopy. We demonstrate that optical integrated Kerr frequency combs can be used to generate several bi- and multiphoton entangled qubits, with direct applications for quantum communication and computation. Our method is compatible with contemporary fiber and quantum memory infrastructures and with chip-scale semiconductor technology, enabling compact, low-cost, and scalable implementations. The exploitation of integrated Kerr frequency combs, with their ability to generate multiple, customizable, and complex quantum states, can provide a scalable, practical, and compact platform for quantum technologies.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/d26c9cf67937ee49f2c33eb30077a9a0e6eebcc3

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Citations in the corpus

Photonic RF and microwave filters based on 49 GHz and 200 GHz Kerr microcombs (2020, background): “Many cutting-edge applications have been demonstrated based on CMOS-compatible micro-combs, ranging from filter-driven mode-locked lasers [49-52] to quantum physics [53-58].”
Integrated electro-optics on thin-film lithium niobate (2024, neutral): “The essential component of TFLN electro-optics is the high-performance EO modulator: it allows electronic control of all degrees of freedom of light, including amplitude 1,5 , phase 48 , frequency 3 , and polarization state 49 , as well as its temporal 50 and spatial profile 51 .”
Chip-to-chip quantum teleportation and multi-photon entanglement in silicon (2019, background): “Recently, a single microresonator has been exploited to produce multiphoton states [10]; however, for scalable quantum devices it is essential to verify the multiphoton indistinguishability and to perform multiqubit operations on the generated photons.”
Optical data transmission at 44Tb/s and 10 bits/s/Hz over the C-band with standard fibre and a single micro-comb source (2020, background): “The discovery of temporal soliton states (DKS – dissipative Kerr solitons) [4,7-11] as a means of mode-locking microcombs has enabled breakthroughs in many fields including spectroscopy [12,13], microwave photonics [14], frequency synthesis [15], optical ranging [16,17], quantum sources [18,19], met”
Roadmap on spatiotemporal light fields (2022, background): “Nevertheless, up to d = 100 dimensions has been controlled with one DoF [6] and up to ten photons in two DoFs [7].”
Multifrequency sources of quantum correlated photon pairs on-chip: a path toward integrated Quantum Frequency Combs (2016, background): “In particular, by combining time-bin entanglement and the wavelength multiplexing approach, we recently demonstrated the generation of bi- and multiphoton-entangled qubits [30].”
RF Photonics: An Optical Microcombs’ Perspective (2018, background): “Its success as a nonlinear optics platform [30], [41], [52], [73], [101], [102] can be attributed to its ultralow linear loss (∼5 − 7 dB·m−1), a sufficiently high nonlinear parameter (∼ 233 W−1·km−1 , 200 times that of standard single-mode telecommunication fibres), and in”
Broadband RF Channelizer Based on an Integrated Optical Frequency Kerr Comb Source (2018, background): “of the need for many discrete components, such as external RF sources and mode-locked lasers. Integrated micro-comb sources [27, 28, 29, 30, 31], particularly those based on CMOS-compatible platforms [32, 33, 34, 35, 36, 37, 38, 39, 40], offer many advantages for broadband RF channelizers compared w”