INQCA


Description | Consortium | Objectives | Personals | Reports | Dissemination


Project Title:INtegrated Quantum Circuits based on non-linear waveguide Arrays
Acronym:INQCA
Contract:Nr. 23 Ro-Fr / 12.01.2015
Project Cod:PN-II-ID-JRP-RO-FR-2014-0013
Grant starting date:January 2015
Grant duration:36 months
Romanian coordinator:TASCU Sorin, Research Center on Advanced Materials and Technologies - RAMTECH, "Alexandru Ioan Cuza" University of Iasi
French coordinator:TANZILLI Sebastien, Laboratoire de Physique de la Matiere Condensee (LPMC), University Nice Sophia Antipolis


PROJECT DESCRIPTION

  Quantum information science is a research field that has established a new benchmark in communication and processing of information, thanks to augmented security protocols in data exchange and increased processing capabilities, both available at the quantum level. Being enlightened by numerous proofs-of-principle, this field is now ready to move on to next generation applications, such as quantum simulation, quantum chemistry, quantum cryptosystems, and quantum sensing. In this perspective, where scalability will actually rely on (re)-configurable and reliable quantum devices, integrated photonic circuits have a strong potential for implementing quantum information processing in optical systems. Integrated quantum photonics has recently emerged and has already proven its suitability for high-performance photon pair source realizations and basic quantum state simulation and manipulation. In this framework, INQCA is geared towards realizing and optimizing dense photonic quantum circuits on lithium niobate, offering increased complexity and flexibility in terms of number of computational channels, input states, and non-classical properties. The main objective of the project therefore lies in the integration of photon pair sources and functionalized arrays of coupled waveguides for demonstrating on-chip photonic quantum state preparation as well as advanced quantum functions and simulations, with unprecedented scalability and stability features.
  On one hand, lithium niobate stands as a one of the most suitable medium for exploiting second-order nonlinear processes. It enables to produce, with high brightness, entangled photons and indistinguishable heralded single photons via spontaneous parametric down-conversion in waveguides integrated on periodically poled lithium niobate. It also permits on-demand (re)-configuration of the waveguide propagation properties via the electro-optical effect, allowing for instance routing single photons in a quantum bus fashion. In addition, such a platform offers the possibility to design and integrate arrays with a large number of waveguides and engineered mutual coupling constants. On the other hand, waveguide array circuitries stand as compact, flexible, and multiport tools for quantum propagation control and quantum manipulation of light in a scalable and integrated manner. Induced photonic lattices are suitable hosts for implementing quantum processes, such as quantum logic gates and optical analogues of the quantum properties of condensed matter systems.



CONSORTIUM

  The INQCA project brings together three academic partners with complementary expertise and facilities in all areas necessary to carry out the project work plan and fulfill the project objectives.


Research Centre on Advanced Materials and Technologies (RAMTECH), "Alexandru Ioan Cuza" University of Iasi, Romania.

  Thanks to a European structural funding, at "Alexandru Ioan Cuza" University of Iasi (Romania) is founded "Research Centre on Advanced Materials and Technologies" (RAMTECH). Since December 2013, the RAMTECH Center is fully operational and gathers all the necessary tools for processing large-scale integrated optical devices. The fabrication and characterization of materials with applications in integrated nonlinear optics, photonics, and optoelectronics, are done through top-level facilities comprising a clean-room laboratory (spin coater, UV mask-aligner, photolithography machine, etc.), a polishing-tailoring laboratory (saw and polishing machines, electrodes deposition, etc.), and two optics/photonics/optoelectronics laboratories (laser sources, detectors, opto-mechanical positioning, etc.).


Laboratoire de Physique de la Matiere Condensee (LPMC), University Nice Sophia Antipolis, CNRS UMR 7336, France

  The LPMC is one of the leading institutes in guided-wave linear and nonlinear optics, from the classical and quantum sides. More specifically, the team "Quantum Information with Light & Matter" (QILM) is specialized in the study and the use of lithium niobate integrated optical devices for guided-wave quantum information science operating in the telecom range. For the purpose of this project, QILM will strongly collaborate with the in-site mesoscopic physics group whose interest lies in wave propagation in complex media for mimicking electronic transport in various photonic lattice arrangements (disordered and/or graphene-like structures).


Laboratoire de Photonique et de Nanostructures (LPN), CNRS UPR 20, France

  The LPN carries out its research activities within the general context of nanosciences. It hosts one of the French national Nanotechnology facilities. The involved teams have a long experience on nonlinear optics as well as non-classical light sources (continuous variables or single photons). It will make its infrastructure available to the project, providing for or even developing speci?c tasks, in particular dielectrics deposition, unavailable at RAMTECH.



OBJECTIVES

  On one hand, lithium niobate stands as a one of the most suitable medium for exploiting second-order nonlinear processes. It enables to produce, with high brightness, entangled photons and indistinguishable heralded single photons via spontaneous parametric down-conversion in waveguides integrated on periodically poled lithium niobate. It also permits on-demand (re)-configuration of the waveguide propagation properties via the electro-optical effect, allowing for instance routing single photons in a quantum bus fashion. In addition, such a platform offers the possibility to design and integrate arrays with a large number of waveguides and engineered mutual coupling constants. On the other hand, waveguide array circuitries stand as compact, flexible, and multiport tools for quantum propagation control and quantum manipulation of light in a scalable and integrated manner. Induced photonic lattices are suitable hosts for implementing quantum processes, such as quantum logic gates and optical analogues of the quantum properties of condensed matter systems.   By merging, on a single chip, the potential of waveguide arrays and high-brightness photon pair sources, we aim at developing integrated quantum devices showing tailored properties operated in both discrete and continuous variable regimes. More specifically, the main targets concern i) on-chip observation of quantum coalescence effects and quantum routing, ii) quantum operator emulation via adequate configuration of the waveguide mutual coupling constants, and iii) on-chip investigation of multi-photon entanglement preparation using photonic lattices. Photonic waveguide arrays can also support extended waves, travelling and interfering along the lattice. A more prospective approach will address the possibility of exploiting such extended waves to manipulate multi-photon and high-dimension quantum states of light.

Task 1. Design, fabrication and characterization of fully integrated quantum chip platforms - will be devoted to the design, fabrication, and characterization of functionalized integrated quantum circuits on lithium niobate. Under the coordination of RAMTECH, it aims at delivering photonic chips based on (re)-configurable nonlinear waveguide arrays containing a few (up to 5) to numerous (up to 20) mutually coupled waveguides.The LPN and the LPMC will address the numerical design of those chips while RAMTECH will carry out all the fabrication steps and first characterizations, including the nonlinear properties and the propagation losses.

Task 2. On-chip photon coalescence and entanglement demonstration using quantum circuits embedding a reconfigurable few-waveguide array - will be devoted to quantum manipulation of quantum circuits embedding a few-waveguide array. Under the coordination of the LPMC, the tasks and associated deliverables will consist of integrated quantum photonic demonstrations using a few identical coupled waveguide arrays.All those quantum demonstrations will be carried out by means of photon correlation measurements using dedicated setups available at LPMC and LPN.

Task 3. On-chip advanced manipulation of quantum light based on engineered waveguide arrays - will be dedicated to on-chip advanced manipulation of quantum states of light based on engineered waveguide arrays, involving up to 20 coupled waveguides. Under the coordination of the LPN, this WP will involve demonstrations of high-dimensional photon-path entanglement generation as well as the implementation of quantum operator simulations in modulated arrays.



PERSONALS

RAMTECH
Dr. Ing. Sorin TASCU - romanian PI
Dr. Alin APETREI
Dr. Alicia Petronla RAMBU
Dr. Florin TUDORACHE
Dr. Iulian PETRILA
Dr. Felicia GHEORGHIU
Tech. Ioan CAUNIC

LPMC
Dr. Sebastien TANZILLI - french PI
Dr. Olivier ALIBAR
Dr. Matthieu BELLEC
Dr. Florent DOUTRE
Ing. Gregory SAUDER

LPN
Dr. Nadia BELABAS
Dr. Ariel LEVENSON
Dr. Kamel BENCHEIKH
Dr. Ing. Christophe MINOT
Dr. Jean-Marie MOISON
Dr. Isabelle ROBERT-PHILIP


REPORTS


DISSEMINATION


A. M. Apetrei, A. P. Rambu, E. Tarcuta, S. Tascu, "Dispersive properties of one dimensional array of Lithium Niobate waveguides", a XLIV-a Conferinta Nationala "FIZICA SI TEHNOLOGIILE EDUCATIONALE MODERNE", Iasi 16 Mai 2015.

A. M. Apetrei, A. P. Rambu, S. Tascu, "Anomalous Dispersion in Lithium Niobate One-Dimensional Waveguide Array at Telecom Wavelength", TIM15-16 Physics Conference, Timisoara 26-28 Mai 2016.

T. Lunghi, F. Doutre, A. P. Rambu, M. Bellec, M. DeMicheli, A. M. Apetrei, O. Alibart, N. Belabas, S. Tascu, and S. Tanzilli Broadband beam splitting using Multiple Recipient Adiabatic Passage, Quantum Engineering, Foundations & Applications, Nice, France, 21.11.2017 - 1.12.2017.

A. M. Apetrei, A. P. Rambu, C. Minot, J-M. Moison, N. Belabas, S. Tascu, Anomalous angular dispersion in lithium niobate one-dimensional waveguide array in the near-infrared wavelength range, Journal of Applied Physics 121 (2017) 073101.