Browsing by Author "Belić, Aleksandar"

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    AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
    El-Neaj, Yousef Abou; Alpigiani, Cristiano; Amairi-Pyka, Sana; Araújo, Henrique; Balaž, Antun; Bassi, Angelo; Bathe-Peters, Lars; Battelier, Baptiste; Belić, Aleksandar; Bentine, Elliot; Bernabeu, José; Bertoldi, Andrea; Bingham, Robert; Blas, Diego; Bolpasi, Vasiliki; Bongs, Kai; Bose, Sougato; Bouyer, Philippe; Bowcock, Themis; Bowden, William; Buchmueller, Oliver; Burrage, Clare; Calmet, Xavier; Canuel, Benjamin; Caramete, Laurentiu-Ioan; Carroll, Andrew; Cella, Giancarlo; Charmandaris, Vassilis; Chattopadhyay, Swapan; Chen, Xuzong; Chiofalo, Maria Luisa; Coleman, Jonathon; Cotter, Joseph; Cui, Yanou; Derevianko, Andrei; De Roeck, Albert; Đorđević, Goran S.; Dornan, Peter; Doser, Michael; Drougkakis, Ioannis; Dunningham, Jacob; Dutan, Ioana; Easo, Sajan; Elertas, Gedminas; Ellis, John; El Sawy, Mai; Fassi, Farida; Felea, Daniel; Feng, Chen-Hao; Flack, Robert; Foot, Chris; Fuentes, Ivette; Gaaloul, Naceur; Gauguet, Alexandre; Geiger, Remi; Gibson, Valerie; Giudice, Gian; Goldwin, Jon; Grachov, Oleg; Graham, Peter W.; Grasso, Dario; van der Grinten, Maurits; Gündogan, Mustafa; Haehnelt, Martin G.; Harte, Tiffany; Hees, Aurélien; Hobson, Richard; Hogan, Jason; Holst, Bodil; Holynski, Michael; Kasevich, Mark; Kavanagh, Bradley J.; von Klitzing, Wolf; Kovachy, Tim; Krikler, Benjamin; Krutzik, Markus; Lewicki, Marek; Lien, Yu-Hung; Liu, Miaoyuan; Luciano, Giuseppe Gaetano; Magnon, Alain; Mahmoud, Mohammed Attia; Malik, Sarah; McCabe, Christopher; Mitchell, Jeremiah; Pahl, Julia; Pal, Debapriya; Pandey, Saurabh; Papazoglou, Dimitris; Paternostro, Mauro; Penning, Bjoern; Peters, Achim; Prevedelli, Marco; Puthiya-Veettil, Vishnupriya; Quenby, John; Rasel, Ernst; Ravenhall, Sean; Ringwood, Jack; Roura, Albert; Sabulsky, Dylan; Sameed, Muhammed; Sauer, Ben; Schäffer, Stefan Alaric; Schiller, Stephan; Schkolnik, Vladimir; Schlippert, Dennis; Schubert, Christian; Sfar, Haifa Rejeb; Shayeghi, Armin; Shipsey, Ian; Signorini, Carla; Singh, Yeshpal; Soares-Santos, Marcelle; Sorrentino, Fiodor; Sumner, Timothy; Tassis, Konstantinos; Tentindo, Silvia; Tino, Guglielmo Maria; Tinsley, Jonathan N.; Unwin, James; Valenzuela, Tristan; Vasilakis, Georgios; Vaskonen, Ville; Vogt, Christian; Webber-Date, Alex; Wenzlawski, André; Windpassinger, Patrick; Woltmann, Marian; Yazgan, Efe; Zhan, Ming-Sheng; Zou, Xinhao; Zupan, Jure
    We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and the terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment for Dark Matter and Gravity Exploration (AEDGE), will also complement other planned searches for dark matter, and exploit synergies with other gravitational wave detectors. We give examples of the extended range of sensitivity to ultra-light dark matter offered by AEDGE, and how its gravitational-wave measurements could explore the assembly of super-massive black holes, first-order phase transitions in the early universe and cosmic strings. AEDGE will be based upon technologies now being developed for terrestrial experiments using cold atoms, and will benefit from the space experience obtained with, e.g., LISA and cold atom experiments in microgravity. KCL-PH-TH/2019-65, CERN-TH-2019-126.
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    Cold atoms in space: community workshop summary and proposed road-map
    Alonso, Iván; Alpigiani, Cristiano; Altschul, Brett; Araújo, Henrique; Arduini, Gianluigi; Arlt, Jan; Badurina, Leonardo; Balaž, Antun; Bandarupally, Satvika; Barish, Barry C.; Barone, Michele; Barsanti, Michele; Bass, Steven; Bassi, Angelo; Battelier, Baptiste; Baynham, Charles F. A.; Beaufils, Quentin; Belić, Aleksandar; Bergé, Joel; Bernabeu, Jose; Bertoldi, Andrea; Bingham, Robert; Bize, Sébastien; Blas, Diego; Bongs, Kai; Bouyer, Philippe; Braitenberg, Carla; Brand, Christian; Braxmaier, Claus; Bresson, Alexandre; Buchmueller, Oliver; Budker, Dmitry; Bugalho, Luís; Burdin, Sergey; Cacciapuoti, Luigi; Callegari, Simone; Calmet, Xavier; Calonico, Davide; Canuel, Benjamin; Caramete, Laurentiu-Ioan; Carraz, Olivier; Cassettari, Donatella; Chakraborty, Pratik; Chattopadhyay, Swapan; Chauhan, Upasna; Chen, Xuzong; Chen, Yu-Ao; Chiofalo, Maria Luisa; Coleman, Jonathon; Corgier, Robin; Cotter, J. P.; Cruise, A. Michael; Cui, Yanou; Davies, Gavin; Roeck, Albert De; Demarteau, Marcel; Derevianko, Andrei; Clemente, Marco Di; Đorđević, Goran S.; Donadi, Sandro; Doré, Olivier; Dornan, Peter; Doser, Michael; Drougakis, Giannis; Dunningham, Jacob; Easo, Sajan; Eby, Joshua; Elertas, Gedminas; Ellis, John; Evans, David; Examilioti, Pandora; Fadeev, Pavel; Fanì, Mattia; Fassi, Farida; Fattori, Marco; Fedderke, Michael A.; Felea, Daniel; Feng, Chen-Hao; Ferreras, Jorge; Flack, Robert; Flambaum, Victor V.; Forsberg, René; Fromhold, Mark; Gaaloul, Naceur; Garraway, Barry M.; Georgousi, Maria; Geraci, Andrew; Gibble, Kurt; Gibson, Valerie; Gill, Patrick; Giudice, Gian F.; Goldwin, Jon; Gould, Oliver; Grachov, Oleg; Graham, Peter W.; Grasso, Dario; Griffin, Paul F.; Guerlin, Christine; Gündoğan, Mustafa; Gupta, Ratnesh K.; Haehnelt, Martin; Hanımeli, Ekim T.; Hawkins, Leonie; Hees, Aurélien; Henderson, Victoria A.; Herr, Waldemar; Herrmann, Sven; Hird, Thomas; Hobson, Richard; Hock, Vincent; Hogan, Jason; Holst, Bodil; Holynski, Michael; Israelsson, Ulf; Jeglič, Peter; Jetzer, Philippe; Juzeliūnas, Gediminas; Kaltenbaek, Rainer; Kamenik, Jernej F.; Kehagias, Alex; Kirova, Teodora; Kiss-Toth, Marton; Koke, Sebastian; Kolkowitz, Shimon; Kornakov, Georgy; Kovachy, Tim; Krutzik, Markus; Kumar, Mukesh; Kumar, Pradeep; Lämmerzahl, Claus; Landsberg, Greg; Poncin-Lafitte, Christophe Le; Leibrandt, David R.; Lévèque, Thomas; Lewicki, Marek; Li, Rui; Lipniacka, Anna; Lisdat, Christian; Liu, Mia; Lopez-Gonzalez, J. L.; Loriani, Sina; Louko, Jorma; Luciano, Giuseppe, Gaetano; Lundblad, Nathan; Maddox, Steve; Mahmoud, M. A.; Maleknejad, Azadeh; March-Russell, John; Massonnet, Didier; McCabe, Christopher; Meister, Matthias; Mežnaršič, Tadej; Micalizio, Salvatore; Migliaccio, Federica; Millington, Peter; Milosevic, Milan; Mitchell, Jeremiah; Morley, Gavin W.; Müller, Jürgen; Murphy, Eamonn; Müstecaplıoğlu, Özgür E.; O’Shea, Val; Oi, Daniel K. L.; Olson, Judith; Pal, Debapriya; Papazoglou, Dimitris G.; Pasatembou, Elizabeth; Paternostro, Mauro; Pawlowski, Krzysztof; Pelucchi, Emanuele; Pereira dos Santos, Franck; Peters, Achim; Pikovski, Igor; Pilaftsis, Apostolos; Pinto, Alexandra; Prevedelli, Marco; Puthiya-Veettil, Vishnupriya; Quenby, John; Rafelski, Johann; Rasel, Ernst M.; Ravensbergen, Cornelis; Reguzzoni, Mirko; Richaud, Andrea; Riou, Isabelle; Rothacher, Markus; Roura, Albert; Ruschhaupt, Andreas; Sabulsky, Dylan O.; Safronova, Marianna; Saltas, Ippocratis D.; Salvi, Leonardo; Sameed, Muhammed; Saurabh, Pandey; Schäffer, Stefan; Schiller, Stephan; Schilling, Manuel; Schkolnik, Vladimir; Schlippert, Dennis; Schmidt, Piet O.; Schnatz, Harald; Schneider, Jean; Schneider, Ulrich; Schreck, Florian; Schubert, Christian; Shayeghi, Armin; Sherrill, Nathaniel; Shipsey, Ian; Signorini, Carla; Singh, Rajeev; Singh, Yeshpal; Skordis, Constantinos; Smerzi, Augusto; Sopuerta, Carlos F.; Sorrentino, Fiodor; Sphicas, Paraskevas; Stadnik, Yevgeny V.; Stefanescu, Petruta; Tarallo, Marco G.; Tentindo, Silvia; Tino, Guglielmo M.; Tinsley, Jonathan N.; Tornatore, Vincenza; Treutlein, Philipp; Trombettoni, Andrea; Tsai, Yu-Dai; Tuckey, Philip; Uchida, Melissa A.; Valenzuela, Tristan; Van Den Bossche, Mathias; Vaskonen, Ville; Verma, Gunjan; Vetrano, Flavio; Vogt, Christian; Klitzing, Wolf, Von; Waller, Pierre; Walser, Reinhold; Wille, Eric; Williams, Jason; Windpassinger, Patrick; Wittrock, Ulrich; Wolf, Peter; Woltmann, Marian; Wörner, Lisa; Xuereb, André; Yahia, Mohamed; Yazgan, Efe; Yu, Nan; Zahzam, Nassim; Cruzeiro, Emmanuel, Zambrini; Zhan, Mingsheng; Zou, Xinhao; Zupan, Jure; Zupanič, Erik
    We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, and atom interferometers. Prospective applications include metrology, geodesy and measurement of terrestrial mass change due to, e.g., climate change, and fundamental science experiments such as tests of the equivalence principle, searches for dark matter, measurements of gravitational waves and tests of quantum mechanics. We review the current status of cold atom technologies and outline the requirements for their space qualification, including the development paths and the corresponding technical milestones, and identifying possible pathfinder missions to pave the way for missions to exploit the full potential of cold atoms in space. Finally, we present a first draft of a possible road-map for achieving these goals, that we propose for discussion by the interested cold atom, Earth Observation, fundamental physics and other prospective scientific user communities, together with the European Space Agency (ESA) and national space and research funding agencies.
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    Consequences for predator–prey dynamics caused by the presence of obstacles
    Šćepanović, Julija; Budinski-Petković, Ljuba; Jakšić, Zorica; Belić, Aleksandar; Vrhovac, Slobodan
    In order to understand how a heterogeneous habitat affects the population dynamics of the predator–prey system, a spatially explicit lattice model consisting of predators, prey and obstacles is constructed. The model includes smart pursuit (predators to prey) and evasion (prey from predators). Both species can affect their movement by visual perception within their finite sighting range. Non-conservative processes that change the number of individuals within the population, such as breeding and physiological dying, are implemented in the model. Obstacles are represented by non-overlapping lattice shapes that are randomly placed on the lattice. In the absence of obstacles, numerical simulations reveal regular, coherent oscillations with a nearly constant predator–prey phase difference. Numerical simulations have shown that changing the probabilities for non-conservative processes can increase or decrease the period of coherent oscillations in species abundances and change the relative lag between coherent components. After introducing obstacles into the model, we observe random transitions between coherent and non-coherent oscillating regimes. In the non-coherent regime, predator and prey abundances continue to oscillate, but without a well-defined phase relationship. Our model suggests that stochasticity introduced by density fluctuations of obstacles is responsible for the reversible shift from coherent to non-coherent oscillations.