Publications (58)
Modulator-free, self-testing quantum random number generator
Ana Blázquez-CoÃdo, Fadri Grünenfelder, Anthony Martin +3
Quantum random number generators (QRNGs) use the inherent unpredictability of quantum mechanics to generate true randomness, as opposed to classical random number generators. Howev…
Detector-device-independent QKD: security analysis and fast implementation
Alberto Boaron, Boris Korzh, Raphael Houlmann +4
One of the most pressing issues in quantum key distribution (QKD) is the problem of detector side- channel attacks. To overcome this problem, researchers proposed an elegant "time-…
Quantum-enhanced sensing via spectral noise reduction
Romain Dalidet, Sébastien Tanzilli, Audrey Dot +4
We report a direct demonstration of quantum-enhanced sensing in the Fourier domain by comparing single- and two-photon interference in a fiber-based interferometer under strictly i…
Algebraic and geometric properties of local transformations
Denis Rosset, Ãmin Baumeler, Jean-Daniel Bancal +4
Some properties of physical systems can be characterized from their correlations. In that framework, subsystems are viewed as abstract devices that receive measurement settings as…
Non-local geometric phase in two-photon interferometry
Anthony Martin, Olivier Alibart, Jean-Christoph Flesch +4
We report the experimental observation of the nonlocal geometric phase in Hanbury Brown-Twiss polarized intensity interferometry. The experiment involves two independent, polar- iz…
Displacing entanglement back and forth between the micro and macro domains
Natalia Bruno, Anthony Martin, Pavel Sekatski +3
Quantum theory is often presented as the theory describing the microscopic world, and admittedly, it has done this extremely well for decades. Nonetheless, the question of whether…
Integrated AlGaAs source of highly indistinguishable and energy-time entangled photons
Claire Autebert, Natalia Bruno, Anthony Martin +6
The generation of nonclassical states of light in miniature chips is a crucial step towards practical implementations of future quantum technologies. Semiconductor materials are id…
Perfectly secure steganography: hiding information in the quantum noise of a photograph
Bruno Sanguinetti, Anthony Martin, Giulia Traverso +2
We show that the quantum nature of light can be used to hide a secret message within a photograph. Using this physical principle we achieve information-theoretic secure steganograp…
Fast self-testing Quantum Random Number Generator based on homodyne detection
Davide Rusca, Hamid Tebyanian, Anthony Martin +1
Self-testing and Semi-Device Independent protocols are becoming the preferred choice for quantum technologies, being able to certify their quantum nature with few assumptions and s…
Plug-and-play measurement of chromatic dispersion by means of two-photon interferometry
Romain Dalidet, Anthony Martin, Mattis Riesner +11
Since the first proof-of-principle experiments 25 years ago, quantum metrology has matured from fundamental concepts to versatile and powerful tools in a large variety of research…
High-Rate Photon Pairs and Sequential Time-Bin Entanglement with SiN Ring Microresonators
Farid Samara, Anthony Martin, Claire Autebert +4
Integrated photonics is increasing in importance for compact, robust, and scalable enabling quantum technologies. This is particularly interesting for developing quantum communicat…
Quantum entropy model of an integrated QRNG chip
Gaëtan Gras, Anthony Martin, Jeong Woon Choi +1
We present the physical model for the entropy source of a quantum random number generator chip based on the quantum fluctuations of the photon number emitted by light-emitting diod…
Towards Device-Independent Quantum Key Distribution with Photonic Devices
Corentin Lanore, Xavier Valcarce, Jean Etesse +2
Quantum Key Distribution (QKD) protocols enable two distant parties to communicate with information-theoretically proven secrecy. However, these protocols are generally vulnerable…
MHz-rate semi-device-independent quantum random number generators based on unambiguous state discrimination
Jonatan Bohr Brask, Anthony Martin, William Esposito +4
An approach to quantum random number generation based on unambiguous quantum state discrimination (USD) is developed. We consider a prepare-and-measure protocol, where two non-orth…
Self-referenced nonlinear interferometry for chromatic dispersion sensing across multiple length scales
Romain Dalidet, Sébastien Tanzilli, Gregory Sauder +2
Chromatic dispersion critically impacts the performance of numerous applications ranging from telecommunication links to ultrafast optics and nonlinear devices, yet fast and precis…
Quantum nonlocality with arbitrary limited detection efficiency
Gilles Pütz, Djeylan Aktas, Anthony Martin +3
The demonstration and use of nonlocality, as defined by Bell's theorem, rely strongly on dealing with non-detection events due to losses and detectors' inefficiencies. Otherwise, t…
Temporal limitations and digital data processing in continuous variable measurements of non-Gaussian states
Antoine Petitjean, Anthony Martin, Mohamed F. Melalkia +6
Non-Gaussian quantum states and operations are essential tools for multiple quantum information protocols exploiting light as information career. In this context, a key role is pla…
Detector-Device-Independent Quantum Key Distribution
Charles Ci Wen Lim, Boris Korzh, Anthony Martin +3
Recently, a quantum key distribution (QKD) scheme based on entanglement swapping, called measurement-device-independent QKD (mdiQKD), was proposed to bypass all detector side-chann…
Quantum-like nonlinear interferometry with frequency-engineered classical light
Romain Dalidet, Anthony Martin, Grégory Sauder +2
Quantum interferometry methods exploit quantum resources, such as photonic entanglement, to enhance phase estimation beyond classical limits. Nonlinear optics has served as a workh…
Quantum-enhanced phase sensitivity in an all-fiber Mach-Zehnder interferometer
Romain Dalidet, Sébastien Tanzilli, Gregory Sauder +3
Recent advances in quantum photonics have enabled increasingly robust protocols in optical phase estimation, achieving precisions beyond the standard quantum limit and approaching…
On the genesis and evolution of Integrated Quantum Optics
Sébastien Tanzilli, Anthony Martin, Florian Kaiser +3
Applications of Integrated Optics to quantum sources, detectors, interfaces, memories and linear optical quantum computing are described in this review. By their inherent compactne…
24-Hour Relativistic Bit Commitment
Ephanielle Verbanis, Anthony Martin, Raphaël Houlmann +3
Bit commitment is a fundamental cryptographic primitive in which a party wishes to commit a secret bit to another party. Perfect security between mistrustful parties is unfortunate…
Multipartite Entanglement in Bright Frequency Combs from Microresonators
Adrien Bensemhoun, C Gonzalez-Arciniegas, Olivier Pfister +6
We present a theoretical model of multimode quantum correlations in bright frequency combs generated in continuous-wave regime by microresonators above threshold. Our analysis show…
Simple 2.5 GHz time-bin quantum key distribution
Alberto Boaron, Boris Korzh, Raphael Houlmann +7
We present a 2.5 GHz quantum key distribution setup with the emphasis on a simple experimental realization. It features a three-state time-bin protocol based on a pulsed diode lase…
Practical measurement-device-independent entanglement quantification
Denis Rosset, Anthony Martin, Ephanielle Verbanis +2
The robust estimation of entanglement is key to the validation of implementations of quantum systems. On the one hand, the evaluation of standard entanglement measures, either usin…
Compact and efficient quantum frequency conversion of a fiber-pigtailed single-photon source
Mathis Cohen, Anthony Martin, Romain Dalidet +9
Quantum frequency converters are key enabling technologies in photonic quantum information science to bridge the gap between quantum emitters and telecom photons. Here, we report a…
Multipartite quantum correlated bright frequency combs
Adrien Bensemhoun, Silvia Cassina, Carlos Gonzalez-Arciniegas +12
This experimental work demonstrates multipartite quantum correlation in bright frequency combs out of a microresonator integrated on silicon nitride operating above its oscillation…
Quantum optical frequency up-conversion for polarisation entangled qubits: towards interconnected quantum information devices
Florian Kaiser, Panagiotis Vergyris, Anthony Martin +4
Realising a global quantum network requires combining individual strengths of different quantum systems to perform universal tasks, notably using flying and stationary qubits. Howe…
Quantifying photonic high-dimensional entanglement
Anthony Martin, Thiago Guerreiro, Alexey Tiranov +5
High-dimensional entanglement offers promising perspectives in quantum information science. In practice, however, the main challenge is to devise efficient methods to characterize…
Demonstration of Quantum Nonlocality in presence of Measurement Dependence
Djeylan Aktas, Sébastien Tanzilli, Anthony Martin +3
Quantum nonlocality stands as a resource for Device Independent Quantum Information Processing (DIQIP), as, for instance, Device Independent Quantum Key Distribution. We investigat…
On the inequivalence of the CH and CHSH inequalities due to finite statistics
Marc-Olivier Renou, Denis Rosset, Anthony Martin +1
Different variants of a Bell inequality, such as CHSH and CH, are known to be equivalent when evaluated on nonsignaling outcome probability distributions. However, in experimental…
Robustness and optimization of N00N-state interferometry
Romain Dalidet, Anthony Martin, Louis Bellando +4
Quantum-enhanced interferometry is often discussed in terms of ideal resources and asymptotic scalings, whereas in practice its performance is set by a delicate interplay between l…
Practical self-testing quantum random number generator based on an energy bound
Davide Rusca, Thomas van Himbeeck, Anthony Martin +5
We present a scheme for a self-testing quantum random number generator. Compared to the fully device-independent model, our scheme requires an extra natural assumption, namely that…
Security proof for a simplified BB84-like QKD protocol
Davide Rusca, Alberto Boaron, Marcos Curty +2
The security of quantum key distribution (QKD) has been proven for different protocols, in particular for the BB84 protocol. It has been shown that this scheme is robust against ev…
Secure quantum key distribution over 421 km of optical fiber
Alberto Boaron, Gianluca Boso, Davide Rusca +10
We present a quantum key distribution system with a 2.5 GHz repetition rate using a three-state time-bin protocol combined with a one-decoy approach. Taking advantage of supercondu…
Accurate and precise optical phase sensor based on a non-linear quantum Sagnac interferometer
Romain Dalidet, Laurent Labonté, Gregory Sauder +2
Optical phase measurements play a key role in the detection of macroscopic parameters such as position, velocity, and displacement. They also permit to qualify the microscopic prop…
Simple and high-speed polarization-based QKD
Fadri Grünenfelder, Alberto Boaron, Davide Rusca +2
We present a simplified BB84 protocol with only three quantum states and one decoy-state level. We implement this scheme using the polarization degree of freedom at telecom wavelen…
Satellite-based Quantum Information Networks: Use cases, Architecture, and Roadmap
Laurent de Forges de Parny, Olivier Alibart, Julien Debaud +11
Quantum Information Networks (QINs) attract increasing interest, as they enable connecting quantum devices over long distances, thus greatly enhancing their intrinsic computing, se…
Experimental weak measurement of two non-commuting observables
Gilles Pütz, Tomer Barnea, Nicolas Gisin +1
The fact that not all quantum observables are jointly measurable is one of the major differences between quantum and classical theory. In the former, non-commuting observables can…
Configurable heralded two-photon Fock-states on a chip
Xin Hua, Tommaso Lunghi, Florent Doutre +10
Progress in integrated photonics enables combining several elementary functions on single substrates for realizing advanced functionnalized chips. We report a monolithic integrated…
Pulsed source of spectrally uncorrelated and indistinguishable photons at telecom wavelengths
Natalia Bruno, Anthony Martin, Thiago Guerreiro +2
We report on the generation of indistinguishable photon pairs at telecom wavelengths based on a type-II parametric down conversion process in a periodically poled potassium titanyl…
High-brightness fiber-based Sagnac source of entangled photon pairs for multiplexed quantum networks
Tess Troisi, Yoann Pelet, Romain Dalidet +4
A fully fibered source of entangled photon pairs based on a nonlinear Sagnac interferometer is reported. Operating at telecom wavelengths, the source relies exclusively on standard…
Deployed quantum key distribution network: further, longer and more users
Nathan Lecaron, Yoann Pelet, Grégory Sauder +6
Entanglement-based quantum links are the backbone of future quantum internet networks, enabling secure communication between distant cities. Realizing such networks requires addres…
Two-photon interference at a telecom wavelength for quantum networking
Mathis Cohen, Laurent Labonté, Romain Dalidet +2
The interference between two independent photons stands as a crucial aspect of numerous quantum information protocols and technologies. In this work, we leverage fiber-coupled devi…
Heralded distribution of single-photon path entanglement
Patrik Caspar, Ephanielle Verbanis, Enky Oudot +9
We report the experimental realization of heralded distribution of single-photon path entanglement at telecommunication wavelengths in a repeater-like architecture. The entanglemen…
High-resolution broadband characterization of resonance dispersion in an optical microresonator
Romain Dalidet, Adrien Bensemhoun, Gregory Sauder +12
Accurate knowledge of the uneven free spectral range of an optical microresonator, which provides direct insight into group velocity dispersion, is essential for understanding and…
Entanglement swapping between independent and asynchronous integrated photon-pair sources
Farid Samara, Nicolas Maring, Anthony Martin +4
Integrated photonics represents a technology that could greatly improve quantum communication networks in terms of cost, size, scaling, and robustness. A key benchmark for this is…
Finite-key analysis on the 1-decoy state QKD protocol
Davide Rusca, Alberto Boaron, Fadri Grünenfelder +2
It has been shown that in the asymptotic case of infinite-key length the 2-decoy state QKD protocol outperforms the 1-decoy state protocol. Here, we present a finite-key analysis o…
Operational entanglement-based quantum key distribution over 50 km of real-field optical fibres
Yoann Pelet, Grégory Sauder, Mathis Cohen +4
We present a real field quantum key distribution link based on energy-time entanglement. Three nodes are connected over the city of Nice by means of optical fibers with a total dis…
Local and scalable detection of genuine multipartite single-photon path entanglement
Patrik Caspar, Enky Oudot, Pavel Sekatski +5
How can a multipartite single-photon path-entangled state be certified efficiently by means of local measurements? We address this question by constructing an entanglement witness…
Analysis of Elliptically Polarized Maximally Entangled States for Bell Inequality Tests
Anthony Martin, Jeanloup Smirr, Florian Kaiser +6
When elliptically polarized maximally entangled states are considered, i.e., states having a non random phase factor between the two bipartite polarization components, the standard…
Performance and security of 5 GHz repetition rate polarization-based Quantum Key Distribution
Fadri Grünenfelder, Alberto Boaron, Davide Rusca +2
We present and characterize a source for a 5 GHz clocked polarization-based simplified BB84 protocol. Secret keys are distributed over 151.5 km of standard telecom fiber at a rate…
Dual wavelength source of entanglement for space quantum communication
Valentin Dumas, Alek Lagarrigue, Tess Troisi +4
We report the demonstration of a bulk, intrinsically phase-stable source of polarization- and time-energy-entangled photon pairs at 810nm and 1550nm, directly coupled into single-m…
Heralded amplification of photonic qubits
Natalia Bruno, Vittorio Pini, Anthony Martin +11
We demonstrate heralded qubit amplification for Time-Bin and Fock-state qubits in an all-fibre, telecom-wavelength, scheme that highlights the simplicity, the stability and potenti…
Entanglement-based clock syntonization for quantum key distribution networks. Demonstration over a 50 km-long link
Yoann Pelet, Grégory Sauder, Sébastien Tanzilli +2
We present the implementation of a time synchronization protocol as part of an experimentally deployed entanglement-based quantum key distribution (QKD) link. The system is deploye…
A self-testing quantum random number generator
Tommaso Lunghi, Jonatan Bohr Brask, Charles Ci Wen Lim +5
The generation of random numbers is a task of paramount importance in modern science. A central problem for both classical and quantum randomness generation is to estimate the entr…
Quantum random number generation on a mobile phone
Bruno Sanguinetti, Anthony Martin, Hugo Zbinden +1
Quantum random number generators (QRNGs) can significantly improve the security of cryptographic protocols, by ensuring that generated keys cannot be predicted. However, the cost,…
Spectral noise in quantum frequency down-conversion from the visible to the telecommunication C-band
Peter C. Strassmann, Anthony Martin, Nicolas Gisin +1
We report a detailed study of the noise properties of a visible-to-telecom photon frequency converter based on difference frequency generation (DFG). The device converts 580 nm pho…