Spectral-Temporal Metrology with Tailored Quantum Measurements

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Deliverables

TF CS of photon waveforms and spectra of complex fields

Demonstration of CS TF tomography of the temporal amplitude of single photons and CS spectral im-aging of complex fields.

Theory of TF compressed sensing

Development of a theory framework for TF compressed sensing with adaptive algorithms, which will obviate the need for prior knowledge.

Implementation of TF superresolution

Report on the superresolved estimation of frequency and time differences between two single photons.

Optimal protocols for multiparameter estimation

Formulation of optimised measurement protocols for multi-parameter estimation, which use a mini-mum amount of resources.

Theory of TF super-resolution

Development of a theory framework for TF superresolution with arbitrary coherence between emitters.

Benefits from quantum measurements

Demonstration of benefits of quantum measurements for multi-parameter estimation in comparison to classical intensity measurements.

TF Shack-Hartmann detector

Experimental implementation of TF Shack-Hartmann-like detection for pulses.

Quantified limits and benefits

We will derive the QCRB for the measurements laid out in WP1 considering the respective experimental systems of the partners and compare it to the classical CRB UNIROMA3 will then focus on the relevant example of measuring KramersKronig relations which are hard to measure classically see also T23

TF mode filtering of single photons

Demonstration and tomography of a quantum-coherent TF mode filter based on a warm-vapour quan-tum memory.

TF CS of quantum states and processes

Investigation of compressed sensing and SET for efficient TF quantum state and process tomography.

Report on communication activities

Review of the communication activities over the first two years of the project and plan for communicating results during the final year and after the project.

Theory framework for TF quantum metrology

Formulation of all required theoretical concepts such as tomography, phase-space representation, and quantum estimation.

Tailored TF modes from quantum emitters

Generation and verification of user-chosen TF modes for optimal metrology from single molecules.

TF projectors for DV and CV systems

Implementation and tomography of projectors onto TF superposition states in both continuous and discrete variable systems

Device prototypes

Prototypes for a packaged homodyne detector and pulse shaper.

Final data management plan

Finalized version of the data management plan.

Data Management Plan

A data management plan will be set up in order to balance openness and protection of scientific information

International work-shop

Organisation of an international workshop to communicate and disseminate the projects results to the wider community during the final year of the project.

Project webpage

Description of the work of the project for dissemination and communication

Publications

Continuous variable multimode quantum states via symmetric group velocity matching

Author(s): V Roman-Rodriguez, B Brecht, Srinivasan K, C Silberhorn, N Treps, E Diamanti and V Parigi
Published in: New J. Phys., Issue 23, 2021, Page(s) 043012, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/abef96

Gaussian quantum metrology for mode-encoded parameters

Author(s): Giacomo Sorelli, Manuel Gessner, Nicolas Treps, Mattia Walschaers
Published in: New Journal of Physics, Issue 26, 2024, Page(s) 073022, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ad5eb2

Metrological detection of entanglement generated by non-Gaussian operations

Author(s): David Barral, Mathieu Isoard, Giacomo Sorelli, Manuel Gessner, Nicolas Treps, Mattia Walschaers
Published in: New Journal of Physics, Issue 26, 2024, Page(s) 083012, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ad6475

Rotation sensing at the ultimate limit

Author(s): Aaron Z Goldberg, Andrei B Klimov, Gerd Leuchs and Luis L Sánchez-Soto
Published in: J. Phys. Photonics, Issue 3, 2021, Page(s) 022008, ISSN 2515-7647
Publisher: IOP Science
DOI: 10.1088/2515-7647/abeb54

Experimental investigation of Bayesian bounds in multiparameter estimation

Author(s): Simone Evaldo D'Aurelio, Mauro Valeri, Emanuele Polino, Valeria Cimini, Ilaria Gianani, Marco Barbieri, Giacomo Corrielli, Andrea Crespi, Roberto Osellame, Fabio Sciarrino and Nicolò Spagnolo
Published in: Quantum Sci. Technol., Issue 7, 2022, Page(s) 025011, ISSN 2058-9565
Publisher: IOPScience
DOI: 10.1088/2058-9565/ac5124

Quantum enhanced measurement of an optical frequency comb

Author(s): Y. Cai, J. Roslund, V. Thiel, C. Fabre, N. Treps
Published in: npj Quantum Information, Issue 7, 2022, Page(s) 82, ISSN 2056-6387
Publisher: Springer Nature
DOI: 10.1038/s41534-021-00419-w

Optimal Observables and Estimators for Practical Superresolution Imaging

Author(s): Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, and Nicolas Treps
Published in: Phys. Rev. Lett., Issue 127, 2021, Page(s) 123604, ISSN 1079-7114
Publisher: American Physical Society
DOI: 10.1103/physrevlett.127.123604

Angle and angular momentum: Uncertainty relations, simultaneous measurement, and phase-space representation

Author(s): Ladislav Mišta, Hubert de Guise, Jaroslav Řeháček, Zdeněk Hradil
Published in: Physical Review A, Issue 106, 2022, ISSN 2469-9926
Publisher: ASP
DOI: 10.1103/physreva.106.022204

Moment-based superresolution: Formalism and applications

Author(s): Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, and Nicolas Treps
Published in: Phys. Rev. A, Issue 104, 2021, Page(s) 033515, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.104.033515

Detector entanglement: Quasidistributions for Bell-state measurements

Author(s): Jan Sperling, Ilaria Gianani, Marco Barbieri, Elizabeth Agudelo
Published in: Physical Review A, Issue 107, 2023, ISSN 2469-9926
Publisher: APS
DOI: 10.1103/physreva.107.012426

Kramers–Kronig relations and precision limits in quantum phase estimation

Author(s): Ilaria Gianani, Francesco Albarelli, Adriano Verna, Valeria Cimini, Rafal Demkowicz-Dobrzanski, and Marco Barbieri
Published in: Optica, Issue 8, 2021, Page(s) 1642-1645, ISSN 2334-2536
Publisher: Optica Publishing Group
DOI: 10.1364/optica.440438

Quantum–Classical Entropy Analysis for Nonlinearly-Coupled Continuous-Variable Bipartite Systems

Author(s): Ángel S. Sanz
Published in: Entropy, Issue 24, 2022, Page(s) 190, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e24020190

Axial superlocalization with vortex beams

Author(s): D Koutný, Z Hradil, J Řeháček and L L Sánchez-Soto
Published in: Quantum Sci. Technol., Issue 6, 2021, Page(s) 025021, ISSN 2058-9565
Publisher: IOP Science
DOI: 10.1088/2058-9565/abe8ca

Optical Quantum Metrology

Author(s): Marco Barbieri
Published in: PRX Quantum, Issue 3, 2022, Page(s) 010202, ISSN 2691-3399
Publisher: Americal Physical Society
DOI: 10.1103/prxquantum.3.010202

Quantumness beyond entanglement: The case of symmetric states

Author(s): Aaron Z. Goldberg, Markus Grassl, Gerd Leuchs, and Luis L. Sánchez-Soto
Published in: Phys. Rev. A, Issue 105, 2022, Page(s) 022433, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.105.022433

Conditional preparation of non-Gaussian quantum optical states by mesoscopic measurement

Author(s): Alex O C Davis, Mattia Walschaers, Valentina Parigi and Nicolas Treps
Published in: New J. Phys., Issue 23, 2021, Page(s) 063039, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ac0204

Spectral and temporal metrology with band-limited functions and finite-time measurements

Author(s): Łukasz Rudnicki, Tomasz Linowski
Published in: Physical Review A, Issue 110, 2024, ISSN 2469-9926
Publisher: APS
DOI: 10.1103/physreva.110.012618

Singular spectrum analysis of two-photon interference from distinct quantum emitters

Author(s): Rocco Duquennoy, Maja Colautti, Pietro Lombardi, Vincenzo Berardi, Ilaria Gianani, Costanza Toninelli, Marco Barbieri
Published in: Physical Review Research, Issue 5, 2023, ISSN 2643-1564
Publisher: APS
DOI: 10.1103/physrevresearch.5.023191

Modern compressive tomography for quantum information science

Author(s): Yong Siah Teo and Luis L. Sánchez-Soto
Published in: Int. J. Quantum Inform., Issue 19, 2021, Page(s) 2140003, ISSN 1793-6918
Publisher: World Scientific Publishing Europe
DOI: 10.1142/s0219749921400037

SPIDERweb: a neural network approach to spectral phase interferometry

Author(s): Ilaria Gianani, Ian A. Walmsley, Marco Barbieri
Published in: Optics Letters, Issue 49, 2024, Page(s) 5415, ISSN 0146-9592
Publisher: Optical Society of America
DOI: 10.1364/ol.534767

Observing thermal lensing with quantum light

Author(s): Marco Barbieri, Iole Venditti, Chiara Battocchio, Vincenzo Berardi, Fabio Bruni, Ilaria Gianani
Published in: Optics Letters, Issue 49, 2024, Page(s) 1257, ISSN 0146-9592
Publisher: Optical Society of America
DOI: 10.1364/ol.513656

Thresholded quantum LIDAR in turbolent media

Author(s): Walter Zedda, Ilaria Gianani, Vincenzo Berardi, Marco Barbieri
Published in: AVS Quantum Science, Issue 4, 2023, ISSN 2639-0213
Publisher: AIP Publishing
DOI: 10.1116/5.0107125

Neural-network quantum state tomography

Author(s): Dominik Koutný, Libor Motka, Zdeněk Hradil, Jaroslav Řeháček, Luis L. Sánchez-Soto
Published in: Physical Review A, Issue 106, 2022, ISSN 2469-9926
Publisher: APS
DOI: 10.1103/physreva.106.012409

Experimental function estimation from quantum phase measurements

Author(s): Ilaria Gianani, Francesco Albarelli, Valeria Cimini, and Marco Barbieri
Published in: Phys. Rev. A, Issue 103, 2021, Page(s) 042602, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.103.042602

Universal compressive tomography in the time-frequency domain

Author(s): Jano Gil-Lopez, Yong Siah Teo, Syamsundar De, Benjamin Brecht, Hyunseok Jeong, Christine Silberhorn, and Luis L. Sánchez-Soto
Published in: Optica, Issue 8, 2021, Page(s) 1296-1305, ISSN 2334-2536
Publisher: Optica Publishing Group
DOI: 10.1364/optica.427645

Fisher-information susceptibility for multiparameter quantum estimation

Author(s): Francesco Albarelli, Ilaria Gianani, Marco G. Genoni, Marco Barbieri
Published in: Physical Review A, Issue 110, 2024, ISSN 2469-9926
Publisher: APS
DOI: 10.1103/physreva.110.032436

Quantum Thermometry with Single Molecules in Nanoprobes

Author(s): V. Esteso, R. Duquennoy, R.C. Ng, M. Colautti, P. Lombardi, G. Arregui, E. Chavez-Angel, C.M. Sotomayor-Torres, P.D. Garcia, M. Hilke, C. Toninelli
Published in: PRX Quantum, Issue 4, 2023, Page(s) 040314, ISSN 2691-3399
Publisher: APS
DOI: 10.1103/prxquantum.4.040314

Witnessing quantum steering by means of the Fisher information

Author(s): Ilaria Gianani, Vincenzo Berardi, and Marco Barbieri
Published in: Phys. Rev. A, Issue 105, 2022, Page(s) 022421, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.105.022421

Benchmarking quantum tomography completeness and fidelity with machine learning

Author(s): Yong Siah Teo, Seongwook Shin, Hyunseok Jeong, Yosep Kim, Yoon-Ho Kim, Gleb I Struchalin, Egor V Kovlakov, Stanislav S Straupe, Sergei P Kulik, Gerd Leuchs and Luis L Sánchez-Soto
Published in: New J. Phys., Issue 23, 2021, Page(s) 103021, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ac1fcb

Unifying uncertainties for rotorlike quantum systems

Author(s): Ladislav Mišta, Matouš Mišta, Zdeněk Hradil
Published in: Physical Review A, Issue 110, 2024, Page(s) 032208, ISSN 2469-9926
Publisher: APS
DOI: 10.1103/physreva.110.032208

Evidence-Based Certification of Quantum Dimensions

Author(s): Y. S. Teo, S. U. Shringarpure, H. Jeong, N. Prasannan, B. Brecht, C. Silberhorn, M. Evans, D. Mogilevtsev, L. L. Sánchez-Soto
Published in: Physical Review Letters, Issue 133, 2024, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.133.050204

Semiparametric estimation of the Hong-Ou-Mandel profile

Author(s): Valeria Cimini, Francesco Albarelli, Ilaria Gianani, and Marco Barbieri
Published in: Phys. Rev. A, Issue 104, 2021, Page(s) L061701, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.104.l061701

Deterministic storage and retrieval of telecom light from a quantum dot single-photon source interfaced with an atomic quantum memory

Author(s): Sarah E. Thomas, Lukas Wagner, Raphael Joos, Robert Sittig, Cornelius Nawrath, Paul Burdekin, Ilse Maillette de Buy Wenniger, Mikhael J. Rasiah, Tobias Huber-Loyola, Steven Sagona-Stophel, Sven Höfling, Michael Jetter, Peter Michler, Ian A. Walmsley, Simone L. Portalupi, Patrick M. Ledingham
Published in: Science Advances, Issue 10, 2024, ISSN 2375-2548
Publisher: Science
DOI: 10.1126/sciadv.adi7346

Improved Tomographic Estimates by Specialized Neural Networks

Author(s): Massimiliano Guarneri, Ilaria Gianani, Marco Barbieri, Andrea Chiuri
Published in: Advanced Quantum Technologies, Issue 6, 2023, ISSN 2511-9044
Publisher: Wiley
DOI: 10.1002/qute.202300027

Calibration of Multiparameter Sensors via Machine Learning at the Single-Photon Level

Author(s): Valeria Cimini, Emanuele Polino, Mauro Valeri, Ilaria Gianani, Nicolò Spagnolo, Giacomo Corrielli, Andrea Crespi, Roberto Osellame, Marco Barbieri, and Fabio Sciarrino
Published in: Phys. Rev. Applied, Issue 15, 2021, Page(s) 044003, ISSN 2331-7019
Publisher: American Physical Society
DOI: 10.1103/physrevapplied.15.044003

Efficient line shape estimation by ghost spectroscopy

Author(s): Ilaria Gianani, Luis L. Sánchez-Soto, Aaron Z. Goldberg, Marco Barbieri
Published in: Optics Letters, Issue 48, 2024, Page(s) 3299, ISSN 0146-9592
Publisher: Optical Society of America
DOI: 10.1364/ol.485451

When quantum state tomography benefits from willful ignorance

Author(s): Libor Motka, Martin Paúr, Jaroslav Řeháček, Zdeněk Hradil and Luis L Sánchez-Soto
Published in: New J. Phys., Issue 23, 2021, Page(s) 073033, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ac0fff

Exploring the ultimate limits: super-resolution enhanced by partial coherence

Author(s): Zdeněk Hradil, Dominik Koutný, and Jaroslav Řeháček
Published in: Opt. Lett., Issue 46, 2021, Page(s) 1728-1731, ISSN 1539-4794
Publisher: Optica Publishing Group
DOI: 10.1364/ol.417988

Distribution and quantification of remotely generated Wigner negativity

Author(s): Yu Xiang, Shuheng Liu, Jiajie Guo, Qihuang Gong, Nicolas Treps, Qiongyi He and Mattia Walschaers
Published in: npj Quantum Inf, Issue 8, 2022, Page(s) 21, ISSN 2056-6387
Publisher: Nature Group
DOI: 10.1038/s41534-022-00533-3

Resolving mutually-coherent point sources of light with arbitrary statistics

Author(s): Ilya Karuseichyk, Giacomo Sorelli, Mattia Walschaers, Nicolas Treps, Manuel Gessner
Published in: Physical Review Research, Issue 4, 2022, ISSN 2643-1564
Publisher: APS
DOI: 10.1103/physrevresearch.4.043010

Intrinsic Sensitivity Limits for Multiparameter Quantum Metrology

Author(s): Aaron Z. Goldberg, Luis L. Sánchez-Soto, and Hugo Ferretti
Published in: Phys. Rev. Lett., Issue 127, 2021, Page(s) 110501, ISSN 1079-7114
Publisher: American Physical Society
DOI: 10.1103/physrevlett.127.110501

Covariant operator bases for continuous variables

Author(s): A. Z. Goldberg, A. B. Klimov, G. Leuchs, L. L. Sanchez-Soto
Published in: Quantum, Issue 8, 2024, Page(s) 1363, ISSN 2521-327X
Publisher: Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften.
DOI: 10.22331/q-2024-05-29-1363

Estimation of a parameter encoded in the modal structure of a light beam: a quantum theory

Author(s): Manuel Gessner, Nicolas Treps, Claude Fabre
Published in: Optica, Issue 10, 2024, Page(s) 996, ISSN 2334-2536
Publisher: Optica
DOI: 10.1364/optica.491368

Taming singularities of the quantum Fisher information

Author(s): Aaron Z. Goldberg, José L. Romero, Ángel S. Sanz and Luis L. Sánchez-Soto
Published in: Int. J. Quantum Inform., Issue 19, 2021, Page(s) 2140004, ISSN 1793-6918
Publisher: World Scientific Publishing Europe Ltd.
DOI: 10.1142/s0219749921400049

Real-time two-photon interference from distinct molecules on the same chip

Author(s): Rocco Duquennoy, Maja Colautti, Ramin Emadi, Prosenjit Majumder, Pietro Lombardi, Costanza Toninelli
Published in: Optica, Issue 9, 2024, Page(s) 731, ISSN 2334-2536
Publisher: Optica Publishing Group
DOI: 10.1364/optica.452317

Fundamental precision limits of fluorescence microscopy: a perspective on MINFLUX

Author(s): Matteo Rosati, Miranda Parisi, Ilaria Gianani, Marco Barbieri, Gabriella Cincotti
Published in: Optics Letters, Issue 49, 2024, Page(s) 4938, ISSN 0146-9592
Publisher: Optical Society of America
DOI: 10.1364/ol.530358

Effects of coherence on temporal resolution

Author(s): Syamsundar De, Jano Gil-Lopez, Benjamin Brecht, Christine Silberhorn, Luis L. Sánchez-Soto, Zdeněk Hradil, and Jaroslav Řeháček
Published in: Phys. Rev. Research, Issue 3, 2021, Page(s) 033082, ISSN 2643-1564
Publisher: American Physical Society
DOI: 10.1103/physrevresearch.3.033082

Achieving the Ultimate Quantum Timing Resolution

Author(s): Vahid Ansari, Benjamin Brecht, Jano Gil-Lopez, John M. Donohue, Jaroslav Řeháček, Zdeněk Hradil, Luis L. Sánchez-Soto, Christine Silberhorn
Published in: PRX Quantum, Issue 2, 2021, ISSN 2691-3399
Publisher: APS
DOI: 10.1103/prxquantum.2.010301

Ghost imaging as loss estimation: Quantum versus classical schemes

Author(s): A. Chiuri, I. Gianani, V. Cimini, L. De Dominicis, M. G. Genoni, and M. Barbieri
Published in: Phys. Rev. A, Issue 105, 2022, Page(s) 013506, ISSN 2469-9934
Publisher: American Physical Society
DOI: 10.1103/physreva.105.013506

Pulse characterization at the single-photon level through chronocyclic Q-function measurements

Author(s): Abhinandan Bhattacharjee, Patrick Folge, Laura Serino, Jaroslav Řeháček, Zdeněk Hradil, Christine Silberhorn, Benjamin Brecht
Published in: arXiv, 2024, Page(s) 2408.12306
Publisher: arXiv
DOI: 10.48550/arxiv.2408.12306

A scheme for fully programmable linear quantum networks based on frequency conversion

Author(s): Patrick Folge, Michael Stefszky, Benjamin Brecht, Christine Silberhorn
Published in: 2024
Publisher: arXiv
DOI: 10.48550/arxiv.2402.06786

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