Generation of Nonclassical Biphoton States through Cascaded Quantum Walks on a Nonlinear Chip

Solntsev, Alexander S.; Setzpfandt, Frank; Clark, Alex S.; Wu, Che Wen; Collins, Matthew J.; Xiong, Chunle; Schreiber, Andreas; Katzschmann, Fabian; Eilenberger, Falk; Schiek, Roland; Sohler, W.; Mitchell, Arnan; Silberhorn, Christine; Eggleton, Benjamin J.; Pertsch, Thomas; Sukhorukov, Andrey A.; Neshev, Dragomir N.; Kivshar, Yuri S.

doi:10.1103/physrevx.4.031007

Cited by 75 publications

(102 citation statements)

References 38 publications

(69 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This leads to highly indistinguishable single-photon emission, either from one source based on wavelength degenerate photon-pair generation [16], or from separate sources [17]. Therefore, the demonstration of photonic quantum protocols has been heavily reliant on SPDC or SFWM photon sources [16,[18][19][20][21][22][23][24]. However, there is one disadvantage of such photon sources: the photon emission is probabilistic, and the probabilities of generating one pair and multipairs are coupled to each other.…”

Section: Two Major Strategies For Single-photon Sourcesmentioning

confidence: 99%

“…Since the first demonstration of on-chip quantum photonic circuits [16], it has become a holy grail to integrate optical components on a photonic chip for quantum information processing [18][19][20][21][22][23]. Nevertheless, most of these demonstrations only have the photon processing circuits on-chip, leaving single-photon sources with bulk optics, and only in [22] single-photon generation and processing take place simultaneously in a nonlinear lithium niobate waveguide array.…”

Section: Silicon Devices For Single Photon Generationmentioning

confidence: 99%

“…Nevertheless, most of these demonstrations only have the photon processing circuits on-chip, leaving single-photon sources with bulk optics, and only in [22] single-photon generation and processing take place simultaneously in a nonlinear lithium niobate waveguide array. There is an urge to develop CMOScompatible on-chip single-photon sources.…”

Section: Silicon Devices For Single Photon Generationmentioning

confidence: 99%

See 2 more Smart Citations

CMOS-compatible photonic devices for single-photon generation

2016

Self Cite

View full text Add to dashboard Cite

Sources of single photons are one of the key building blocks for quantum photonic technologies such as quantum secure communication and powerful quantum computing. To bring the proof-of-principle demonstration of these technologies from the laboratory to the real world, complementary metal-oxide-semiconductor (CMOS)-compatible photonic chips are highly desirable for photon generation, manipulation, processing and even detection because of their compactness, scalability, robustness, and the potential for integration with electronics. In this paper, we review the development of photonic devices made from materials (e.g., silicon) and processes that are compatible with CMOS fabrication facilities for the generation of single photons.

show abstract

Section: Two Major Strategies For Single-photon Sourcesmentioning

confidence: 99%

Section: Silicon Devices For Single Photon Generationmentioning

confidence: 99%

Section: Silicon Devices For Single Photon Generationmentioning

confidence: 99%

See 1 more Smart Citation

CMOS-compatible photonic devices for single-photon generation

2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Extended lattices of coupled waveguides have been used for various fundamental studies and applications, ranging from artificial graphene 3,4 and quantum walks [5][6][7][8] to mode-locking of lasers 9 and quantum state preparation 10,11 . These systems are usually based on coupling between nearest neighbours.…”

mentioning

confidence: 99%

Direct measurement of second-order coupling in a waveguide lattice

Keil

Pressl

Heilmann

et al. 2015

Applied Physics Letters

View full text Add to dashboard Cite

We measure the next-nearest-neighbour coupling in an array of coupled optical waveguides directly via an integrated eigenmode interferometer. In contrast to light propagation experiments, the technique is insensitive to nearest-neighbour dynamics. Our results show that second-order coupling in a linear configuration can be suppressed well below the level expected from the exponential decay of the guided modes.50 years past its proposition 1 , evanescent coupling between optical waveguides has become a standard part in the optical engineer's toolbox and is now widely applied in science and industry 2 . Extended lattices of coupled waveguides have been used for various fundamental studies and applications, ranging from artificial graphene 3,4 and quantum walks 5-8 to mode-locking of lasers 9 and quantum state preparation 10,11 . These systems are usually based on coupling between nearest neighbours. Coupling between more distant sites can often be neglected, due to an exponential decay of the waveguide modes 12 . Yet, there are configurations for which precise knowledge and control of such couplings become crucial. For instance, some one-dimensional arrays are designed towards an effective cancellation of nearest-neighbour coupling after certain distances, such that coupling between next-nearest-neighbours (henceforth termed 'second-order coupling') can become the dominant mechanism of transverse transport [13][14][15][16] . Evidently, the distance between next-nearest neighbours in two-dimensional lattices does not need to be much larger than the one between nearest neighbours 4,7 . Therefore, second-order coupling is often quite relevant in such systems. Moreover, second-order coupling has been shown to have considerable impact in nonlinear optics, where it determines the existence of a power treshold for discrete solitons 17 , as well as on two-particle interference conditions in the quantum regime 18 .In order to obtain systematic knowledge of how and with which strength second-order coupling arises in the configurations of interest it would be desirable to measure it directly. However, its subtle influence on the propagation dynamics is often masked by the much stronger firstorder coupling (or the unknown fidelity of its cancelling mechanism), such that it is quite hard to unambiguously extract the second-order coupling from light propagation experiments. It seems more promising to use the impact of second-order coupling on the eigenmodes of the system for experimental access. Indeed, second-and even third-order coupling in square and honeycomb lattices of microwave resonators have been unambiguously identia) Electronic mail: robert.keil@uibk.ac.at fied from their frequency spectra 19 . In optics, however, a direct measurement of waveguide eigenmodes is more challenging and requires interferometric techniques. In this work, we present such a method and apply it to measure second-order coupling in the most fundamental system where it can occur -an array of three waveguides. In particular, we investigate whethe...

show abstract

“…The above experiments use a single-photon resource generated outside a chip. However, current experimental works demonstrate on-chip direct generation of DV entanglement by using a directional coupler, waveguide arrays consisting of a non-linear optical crystal [36,37], and integrated waveguide circuits with a siliconon-insulator photonic platform, which utilize spontaneous four-wave mixing process [38].…”

Section: Generation Of Photon-entangled Statesmentioning

confidence: 99%

On-chip continuous-variable quantum entanglement

Masada

Furusawa

2016

Nanophotonics

View full text Add to dashboard Cite

Entanglement is an essential feature of quantum theory and the core of the majority of quantum information science and technologies. Quantum computing is one of the most important fruits of quantum entanglement and requires not only a bipartite entangled state but also more complicated multipartite entanglement. In previous experimental works to demonstrate various entanglement-based quantum information processing, light has been extensively used. Experiments utilizing such a complicated state need highly complex optical circuits to propagate optical beams and a high level of spatial interference between different light beams to generate quantum entanglement or to efficiently perform balanced homodyne measurement. Current experiments have been performed in conventional free-space optics with large numbers of optical components and a relatively largesized optical setup. Therefore, they are limited in stability and scalability. Integrated photonics offer new tools and additional capabilities for manipulating light in quantum information technology. Owing to integrated waveguide circuits, it is possible to stabilize and miniaturize complex optical circuits and achieve high interference of light beams. The integrated circuits have been firstly developed for discrete-variable systems and then applied to continuous-variable systems. In this article, we review the currently developed scheme for generation and verification of continuous-variable quantum entanglement such as Einstein-Podolsky-Rosen beams using a photonic chip where waveguide circuits are integrated. This includes balanced homodyne measurement of a squeezed state of light. As a simple example, we also review an experiment for generating discrete-variable quantum entanglement using integrated waveguide circuits.

show abstract

Generation of Nonclassical Biphoton States through Cascaded Quantum Walks on a Nonlinear Chip

Cited by 75 publications

References 38 publications

CMOS-compatible photonic devices for single-photon generation

CMOS-compatible photonic devices for single-photon generation

Direct measurement of second-order coupling in a waveguide lattice

On-chip continuous-variable quantum entanglement

Contact Info

Product

Resources

About