QUCHIP project deliverables
The page lists 24 deliverables related to the research project "QUCHIP".
List of Deliverables
| title and desprition | type | last update |
|---|---|---|
Identification of noise effects on transport dynamics beyond classical dephasing modelThe most common characterization of dephasing processes is done in terms of a classically fluctuating field (Orstein-Uhlenbeck). This generally yields to master equation formulations that provide an accurate description of the system’s dynamics in the high temperature limit. However, many decoherence sources fall outside this description and require for its understanding the consideration of non trivial spectral densities. Using a unitary transformation that allows us to map out a spin-boson configuration into a spin coupled to a semi-infinite chain of harmonic oscillators with nearest neighbor couplings, we will characterize those effects on the transport dynamics whose origin can be unambiguously traced back to deviations from the action of a stationary, Gaussian, and markovian decoherence. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-10-08 |
Scatter-shot Boson Sampling with simple structure\"The achievement of scatter-shot Boson Sampling will be carried out by several partners. The unitary evolution will be implemented via an integrated circuit while the generation of heralded single photon states and single photon detection will be achieved via bulk optics techniques. The \"\"simple\"\" implementation should be carried out with 3 photons, 10-15 modes, and 4-8 two-photon pair sources.\" Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-10-08 |
Road map for quantum supremacy via Boson SamplingThe Boson Sampling problem suggests that some simple quantum optical systems produce outcomes that cannot be efficiently simulated by classical computation. Remarkably, the scale at which classical simulation is impossible with current technology may be achievable in the near term. We will produce a road map for experimentally demonstrating the superiority of a quantum machine over a classical machine for a computational task based on the Boson Sampling problem. The road map will reflect advances made in both theoretical issues - including validation of a Boson Sampling machine and the computational complexity of Boson Sampling variants with realistic experimental imperfections – as well as new experimental capabilities – including large coupled waveguide arrays, arrays of heralded photon sources, and efficient integrated photon detectors. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-10-08 |
Simulation of small size quantum systemsRandom-walk structures and non-trivial two-qubit gates will be used for obtaining insight into the quantum correlations of other quantum systems. The Bosonic nature of photons as well as the capability of preparing anti-symmetric entangled states will be exploited for simulating properties that are hard for classical computers when scaling up the number of particles. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Complex 3D integrated structureReconfigurable devices will be fabricated by femtosecond laser writing with the addition of thermal shifters on the glass surface. In particular, a three-arm interferometer with variable phases in two of the three arms will be demonstrated. The capability of producing waveguides at variable depths into the glass will be exploited to reduce the cross-talk of the thermal shifters on different waveguides. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Demonstrators, pilots, prototypes | 2019-05-30 |
Polarization quantum walk on a chipAlthough most optical quantum computing experiments rely on polarization-encoded qubits, the majority of standard integrated-optic devices are unable to deal with such qubits, because of fast relative phase or amplitude decoherence. We are replacing the standardly used dual-rail encoding (where a qubit is encoded in two spatial modes) by laser-written waveguides that allow the processing of polarization- and path-encoded qubits. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Hierarchy of validation testsCertifying that a Boson Sampling device is working as expected is crucial in a Boson Sampling experimental demonstration. To address this challenging problem we will investigate a tree-level hierarchy of validations tests. Several ideas that provide evidence that a Boson Sampling experiment is working correctly have been suggested. We will use the photon clouding effect and the cancellation effect Fourier interferometers to tests the quality of a Boson Sampling machine. Previous approaches provide a weaker certification guarantee. To reach the best certification quality we will adapt “computational certification†tools, such as interactive proofs or self-testing of quantum devices, to design certification protocols for Boson Sampling. Because the imperfection in a Boson Sampling test come from experimental noise, not from the action of a malicious agent, an intermediate approach that we will investigate consist in relaxing some of the assumption in “computational certification†to make the theoretical and experimental analysis easier while keeping most of its benefits. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Scatter-shot Boson Sampling with complex structureScatter-shot boson sampling allows large numbers of photons to be generated in a state useful for boson sampling algorithms, in a highly efficient fashion with respect to resources. We will apply this novel photon source to sample from graph structures implementable with photonic quantum walks. We will use complex circuitry to implement graphs of increasing levels of connectivity. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
2D quantum walkTaking advantage of the unique 3D capability of femtosecond-laser-writing technology, we will produce optical circuits in three-dimensional layouts as a platform for 2D quantum walk experiments. We will demonstrate both 2D arrays of straight waveguides for continuous quantum walks and cascaded directional couplers branching in 3D for discrete quantum walk experiments. Characterization of these structures will be provided with coherent light and these devices will be subsequently used in final experiments with multiple quantum walkers in D1.4 Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
1st periodic reportPeriodic report referring to the 1st period (M1-M18) consisting in a technical report with a summary and an overview of the project progress, and a financial report, including all financial statements and an explanation of the use of resources. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Popularization of scientific resultsThe impact of the achievements will be measured through publications in peer-reviewed high-quality journals such as Nature, Science, Physical Review Letters, New Journal of Physics and Physical Review. For outstanding research highlights, the press offices of the participating institutions will issue press releases and also liaise with the national media as well as YouTube and Wikipedia contributions. All participants will assist in preparing these press releases, i.e. writing of comprehensive and popular summaries of the research results. In addition our on-going results will be disseminated at national workshops and conferences and at international workshops and larger overseas conferences. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Websites, patent fillings, videos etc. | 2019-05-30 |
Integration of SSPD and waveguide circuitsSuperconducting single photon detectors (SSPD) will be fabricated directly onto waveguide circuit chips, to electrically readout the detection signals of single photons guided through said circuits. Two approaches will be pursued: 1) detector integration on glass waveguide circuits (CNR), 2) detector integration on SOI waveguides (USOTON, UBRIS). The aim is to target increased collection efficiency with evanescent mode overlap between the wave-guide and detector structures. As contingency plan, CNR will develop efficient nanowire SSPDs fiber-coupled to quantum photonic circuits. This will miniaturise the overall footprint of the photonic processor setup. This will enable the processor platform to utilise the fast response times of SSPDs and detection of single photons that are of visible-telecomm wavelengths. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
On-chip array of single-photon sourcesThe integration of single photon sources can provide a more scalable method for the generation of multi-photon states required for quantum simulations. We will develop a photonic chip that includes an array of single photon sources. The chip will be composed of a circuit to distribute light from the same pump laser to various spontaneous Four Wave Mixing waveguide sources and a frequency filtering stage. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Multi-walker on multi-dimensionObserving a quantum walk of multiple indistinguishable particles on a multidimensional lattice graph constitutes a significant advance for experimental quantum information. We are developing guided-wave approaches for walks that use time-, space-, and polarization-encoding; each of these will contribute to achieving increasingly complex quantum walk systems. We will report on the design and operation of a system for studying the first multidimensional, multi-walker quantum walks. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Cryogenic operation of waveguide circuitsEfficient superconducting single photon detectors operate at temperatures of a few K. Fibre coupling to these detectors loses the advantage of high efficiency when detecting many photons. We will explore the function of a more integrated approach and test the operation of key waveguide features at cryogenic temperatures. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Final international workshop on photonics quantum simulationA final international workshop on photonics quantum simulation to show case the QUCHIP achievements, disseminate the project results, and discuss these results in the wider community. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Final reportFinal report for the entire project consisting in a technical and a financial final reports. The technical report will include a summary of scientific and technological Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Demonstration of noise assisted transport in a realistic waveguide arrayWaveguide arrays have sufficient flexibility to allow for the investigation of the effects of different forms of noise and disorder on excitation transfer in different types of graphs. The interplay between the underlying coherent dynamics, which typically leads to the enhancement or the suppression of certain transport paths, and the incoherent phenomena due to environmental noise is thought to be crucial for the resilient performance of biomolecular networks in charge of distributing energy and transporting charge across mesoscopic regions in both plants and bacteria. It may also play a role in randomized algorithms in quantum computer science. We will investigate the impact of different forms of network structures and trapping to elucidate the conditions required for optimal transport performance for settings ranging from biology to random walks on graphs. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Demonstrators, pilots, prototypes | 2019-05-30 |
2nd periodic reportPeriodic report referring to the 2nd period (M19-M36) consisting in a technical report with a summary and an overview of the project progress, and a financial report, including all financial statements and an explanation of the use of resources. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-05-30 |
Video on project highlightsA video showing QUCHIP highlights will be developed, including a brief information about the project (name, funding scheme, participating institutions, project objectives, main results of the project, acknowledgment to EU, etc). The video will be targeted to a technical and non-technical audience and is intended for a large distribution (YouTube). Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Websites, patent fillings, videos etc. | 2019-05-30 |
Wikipedia webpages, leaflets on goalsNew wikipedia webpages developed by the project beneficiaries. The pages will be then regularly updated with the project results. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Websites, patent fillings, videos etc. | 2019-04-02 |
Logo and webA QUCHIP logo will be designed to be graphically appealing and to include a reference to the project topic. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Websites, patent fillings, videos etc. | 2019-04-02 |
Photon cloudingPhoton clouding is a recently discovered phenomenon, related to but different from bosonic bunching, in which photons are found to cluster together in local groups of modes. This effect has been useful for verifying Boson Sampling and we will further explore this application of clouding by tuning optical circuits to implement random unitary operations and then retune to implement unitaries that exhibit clouding. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Documents, reports | 2019-04-02 |
Polarization entangled sourcePairs of orthogonally polarized photons will be generated in two different periodically poled waveguides on LiNbO3 (PPLN) wafers and subsequently split on an integrated polarizing beam splitter (PBS) such that the photons of each pair emege on two different spatial modes with orthogonal polarizations. The superposition of the states generated by the two different sources results in the desired entangled state. In this scheme the quality of the entanglement depends on both the homogeneity of the two poled waveguides and the splitting ratio of the integrated polarizing beam splitter. The combination of these characteristics with the high brightness of our PPLN waveguides which reaches values of about 1.5 photons per microW at 1 MHz repetition rate, will result in a source of polarization entangled states whose brightness is 2 orders of magnitude higher than the available bulk sources. Programme: H2020-EU.1.2.2. - Topic(s): FETPROACT-3-2014 |
Demonstrators, pilots, prototypes | 2019-04-02 |