Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the second workshop Abdalla, Adam Abe, Mahiro Abend, Sven Abidi, Mouine Aidelsburger, Monika Alibabaei, Ashkan Allard, Baptiste Antoniadis, John Arduini, Gianluigi Augst, Nadja Balamatsias, Philippos Balaž, Antun Banks, Hannah Barcklay, Rachel L. Barone, Michele Barsanti, Michele Bason, Mark G. Bassi, Angelo Bayle, Jean Baptiste Baynham, Charles F.A. Beaufils, Quentin Beldjoudi, Sélyan Belić, Aleksandar Bennetts, Shayne Bernabeu, Jose Bertoldi, Andrea Bigard, Clara Bigelow, N. P. Bingham, Robert Blas, Diego Bobrick, Alexey Boehringer, Samuel Bogojević, Aleksandar Bongs, Kai Bortoletto, Daniela Bouyer, Philippe Brand, Christian Buchmueller, Oliver Buica, Gabriela Calatroni, Sergio Calmels, Léo Canizares, Priscilla Canuel, Benjamin Caramete, Ana Caramete, Laurentiu Ioan Carlesso, Matteo Carlton, John Carman, Samuel P. Carroll, Andrew Casariego, Mateo Chairetis, Minoas Charmandaris, Vassilis Chauhan, Upasna Chen, Jiajun Chiofalo, Maria Luisa Maria Luisa Marilù Ciampini, Donatella Cimbri, Alessia Cladé, Pierre Coleman, Jonathon Constantin, Florin Lucian Contaldi, Carlo R. Corgier, Robin Dash, Bineet Davies, G. J. De Rham, Claudia De Roeck, Albert Derr, Daniel Dey, Soumyodeep Di Pumpo, Fabio Djordjevic, Goran S. Döbrich, Babette Dornan, Peter Doser, Michael Drougakis, Giannis Dunningham, Jacob Duspayev, Alisher Easo, Sajan Eby, Joshua Efremov, Maxim Elertas, Gedminas Ellis, John Entin, Nicholas Fairhurst, Stephen Fanì, Mattia Fassi, Farida Fayet, Pierre Felea, Daniel Feng, Jie Flack, Robert Foot, Chris Freegarde, Tim Fuchs, Elina Gaaloul, Naceur Gao, Dongfeng Gardner, Susan Garraway, Barry M. Garrido Alzar, Carlos L. Gauguet, Alexandre Giese, Enno Gill, Patrick Giudice, Gian F. Glasbrenner, Eric P. Glick, Jonah Graham, Peter W. Granados, Eduardo Griffin, Paul F. Gué, Jordan Guellati-Khelifa, Saïda Gupta, Subhadeep Gupta, Vishu Hackermueller, Lucia Haehnelt, Martin Hakulinen, Timo Hammerer, Klemens Hanımeli, Ekim T. Harte, Tiffany Hartmann, Sabrina Hawkins, Leonie Hees, Aurelien Herbst, Alexander Hird, Thomas M. Hobson, Richard Hogan, Jason Holst, Bodil Holynski, Michael Hosten, Onur ; https://orcid.org/0000-0002-2031-204X Hsu, Chung Chuan Huang, Wayne Cheng Wei Hughes, Kenneth M. Hussain, Kamran Hütsi, Gert Iovino, Antonio Isfan, Maria Catalina Janson, Gregor Jeglič, Peter Jetzer, Philippe Jiang, Yijun Juzeliūnas, Gediminas Kaenders, Wilhelm Kalliokoski, Matti Kehagias, Alex Kilian, Eva Klempt, Carsten Knight, Peter Koley, Soumen Konrad, Bernd Kovachy, Tim Krutzik, Markus Kumar, Mukesh Kumar, Pradeep Labiad, Hamza Lan, Shau Yu Landragin, Arnaud Landsberg, Greg Langlois, Mehdi Lanigan, Bryony Leone, Bruno Le Poncin-Lafitte, Christophe Lellouch, Samuel Lewicki, Marek Lien, Yu Hung Lombriser, Lucas Asamar, Elias Lopez Lopez-Gonzalez, J. Luis Lu, Chen Luciano, Giuseppe Gaetano Lundblad, Nathan De J. López Monjaraz, Cristian Lowe, Adam Mackoit-Sinkevičienė, Mažena Maggiore, Michele Majumdar, Anirban Makris, Konstantinos Maleknejad, Azadeh Marchant, Anna L. Mariotti, Agnese Markou, Christos Matthews, Barnaby Mazumdar, Anupam Mccabe, Christopher Meister, Matthias Mentasti, Giorgio Menu, Jonathan Messineo, Giuseppe Meyer-Hoppe, Bernd Micalizio, Salvatore Migliaccio, Federica Millington, Peter Milosevic, Milan Mishra, Abhay Mitchell, Jeremiah Morley, Gavin W. Mouelle, Noam Müller, Jürgen Newbold, David Ni, Wei Tou Niehof, Christian Noller, Johannes Odžak, Senad Oi, Daniel K.L. Oikonomou, Andreas Omar, Yasser Overstreet, Chris Puthiya Veettil, Vishnupriya Pahl, Julia Paling, Sean Pan, Zhongyin Pappas, George Pareek, Vinay Pasatembou, Elizabeth Paternostro, Mauro Pathak, Vishal K. Pelucchi, Emanuele Pereira Dos Santos, Franck Peters, Achim Pichery, Annie Pikovski, Igor Pilaftsis, Apostolos Pislan, Florentina Crenguta Plunkett, Robert Poggiani, Rosa Prevedelli, Marco Rafelski, Johann Raidal, Juhan Raidal, Martti Rasel, Ernst Maria Renaux-Petel, Sébastien Richaud, Andrea Rivero-Antunez, Pedro Rodzinka, Tangui Roura, Albert Rudolph, Jan Sabulsky, Dylan Safronova, Marianna S. Sakellariadou, Mairi Salvi, Leonardo Sameed, Muhammed Sarkar, Sumit Schach, Patrik Schäffer, Stefan Alaric Schelfhout, Jesse Schilling, Manuel Schkolnik, Vladimir Schleich, Wolfgang P. Schlippert, Dennis Schneider, Ulrich Schreck, Florian Schwartzman, Ariel Schwersenz, Nico Sergijenko, Olga Sfar, Haifa Rejeb Shao, Lijing Shipsey, Ian Shu, Jing Singh, Yeshpal Sopuerta, Carlos F. Sorba, Marianna Sorrentino, Fiodor Spallicci, Alessandro D.A.M. Stefanescu, Petruta Stergioulas, Nikolaos Stoerk, Daniel Thaivalappil Sunilkumar, Hrudya Ströhle, Jannik Tam, Zoie Tandon, Dhruv Tang, Yijun Tell, Dorothee Tempere, Jacques Temples, Dylan J. Thampy, Rohit P. Tietje, Ingmari C. Tino, Guglielmo M. Tinsley, Jonathan N. Tintareanu Mircea, Ovidiu Tkalčec, Kimberly Tolley, Andrew J. Tornatore, Vincenza Torres-Orjuela, Alejandro Treutlein, Philipp Trombettoni, Andrea Ufrecht, Christian Urrutia, Juan Valenzuela, Tristan Valerio, Linda R. Van Der Grinten, Maurits Vaskonen, Ville Vázquez-Aceves, Verónica Veermäe, Hardi Vetrano, Flavio Vitanov, Nikolay V. Von Klitzing, Wolf Wald, Sebastian ; https://orcid.org/0000-0002-5869-1604 Walker, Thomas Walser, Reinhold Wang, Jin Wang, Yan Weidner, C. A. Wenzlawski, André Werner, Michael Wörner, Lisa Yahia, Mohamed E. Yazgan, Efe Zambrini Cruzeiro, Emmanuel Zarei, M. Zhan, Mingsheng Zhang, Shengnan Zhou, Lin Zupanič, Erik ddc:530 This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024 (Second Terrestrial Very-Long-Baseline Atom Interferometry Workshop, Imperial College, April 2024), building on the initial discussions during the inaugural workshop held at CERN in March 2023 (First Terrestrial Very-Long-Baseline Atom Interferometry Workshop, CERN, March 2023). Like the summary of the first workshop (Abend et al. in AVS Quantum Sci. 6:024701, 2024), this document records a critical milestone for the international atom interferometry community. It documents our concerted efforts to evaluate progress, address emerging challenges, and refine strategic directions for future large-scale atom interferometry projects. Our commitment to collaboration is manifested by the integration of diverse expertise and the coordination of international resources, all aimed at advancing the frontiers of atom interferometry physics and technology, as set out in a Memorandum of Understanding signed by over 50 institutions (Memorandum of Understanding for the Terrestrial Very Long Baseline Atom Interferometer Study). Springer Nature 2025 info:eu-repo/semantics/article doc-type:article text http://purl.org/coar/resource_type/c_dcae04bc https://research-explorer.ista.ac.at/record/19636 https://research-explorer.ista.ac.at/download/19636/19653 Abdalla A, Abe M, Abend S, et al. Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the second workshop. <i>EPJ Quantum Technology</i>. 2025;12. doi:<a href="https://doi.org/10.1140/epjqt/s40507-025-00344-3">10.1140/epjqt/s40507-025-00344-3</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1140/epjqt/s40507-025-00344-3 info:eu-repo/semantics/altIdentifier/e-issn/2196-0763 info:eu-repo/semantics/altIdentifier/wos/001489653300001 info:eu-repo/semantics/altIdentifier/arxiv/2412.14960 https://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess