2017, Huang, Huiying, Trotta, Rinaldo, Huo, Yongheng, Lettner, Thomas, Wildmann, Johannes S., Martín-Sánchez, Javier, Huber, Daniel, Reindl, Marcus, Zhang, Jiaxiang, Zallo, Eugenio, Schmidt, Oliver G., Rastelli, Armando

We demonstrate the first wavelength-tunable electrically pumped source of nonclassical light that can emit photons with wavelength in resonance with the D2 transitions of 87Rb atoms. The device is fabricated by integrating a novel GaAs single-quantum-dot light-emitting diode (LED) onto a piezoelectric actuator. By feeding the emitted photons into a 75 mm long cell containing warm 87Rb vapor, we observe slow-light with a temporal delay of up to 3.4 ns. In view of the possibility of using 87Rb atomic vapors as quantum memories, this work makes an important step toward the realization of hybrid-quantum systems for future quantum networks.

2020, Ahumada, Romina, Prieto, Carlos Allende, Almeida, Andrés, Anders, Friedrich, Anderson, Scott F., Andrews, Brett H., Anguiano, Borja, Arcodia, Riccardo, Armengaud, Eric, Aubert, Marie, Avila, Santiago, Garcia, Rafael A., García-Hernández, D.A., Oehmichen, Luis Alberto Garma, Ge, Junqiang, Maia, Marcio Antonio Geimba, Geisler, Doug, Gelfand, Joseph, Goddy, Julian, Gonzalez-Perez, Violeta, Grabowski, Kathleen, Avila-Reese, Vladimir, Green, Paul, Grier, Catherine J., Guo, Hong, Guy, Julien, Harding, Paul, Hasselquist, Sten, Hawken, Adam James, Hayes, Christian R., Hearty, Fred, Hekker, S., Badenes, Carles, Hogg, David W., Holtzman, Jon A., Horta, Danny, Hou, Jiamin, Hsieh, Bau-Ching, Huber, Daniel, Hunt, Jason A. S., Chitham, J. Ider, Imig, Julie, Jaber, Mariana, Balland, Christophe, Angel, Camilo Eduardo Jimenez, Johnson, Jennifer A., Jones, Amy M., Jönsson, Henrik, Jullo, Eric, Kim, Yerim, Kinemuchi, Karen, Kirkpatrick IV, Charles C., Kite, George W., Klaene, Mark, Barger, Kat, Kneib, Jean-Paul, Kollmeier, Juna A., Kong, Hui, Kounkel, Marina, Krishnarao, Dhanesh, Lacerna, Ivan, Lan, Ting-Wen, Lane, Richard R., Law, David R., Le Goff, Jean-Marc, Barrera-Ballesteros, Jorge K., Leung, Henry W., Lewis, Hannah, Li, Cheng, Lian, Jianhui, Lin, Lihwai, Long, Dan, Longa-Peña, Penélope, Lundgren, Britt, Lyke, Brad W., Ted Mackereth, J., Basu, Sarbani, MacLeod, Chelsea L., Majewski, Steven R., Manchado, Arturo, Maraston, Claudia, Martini, Paul, Masseron, Thomas, Masters, Karen L., Mathur, Savita, McDermid, Richard M., Merloni, Andrea, Bautista, Julian, Merrifield, Michael, Mészáros, Szabolcs, Miglio, Andrea, Minniti, Dante, Minsley, Rebecca, Miyaji, Takamitsu, Mohammad, Faizan Gohar, Mosser, Benoit, Mueller, Eva-Maria, Muna, Demitri, Beaton, Rachael L., Muñoz-Gutiérrez, Andrea, Myers, Adam D., Nadathur, Seshadri, Nair, Preethi, Nandra, Kirpal, do Nascimento, Janaina Correa, Nevin, Rebecca Jean, Newman, Jeffrey A., Nidever, David L., Nitschelm, Christian, Beers, Timothy C., Noterdaeme, Pasquier, O’Connell, Julia E., Olmstead, Matthew D., Oravetz, Daniel, Oravetz, Audrey, Osorio, Yeisson, Pace, Zachary J., Padilla, Nelson, Palanque-Delabrouille, Nathalie, Palicio, Pedro A., Benavides, B. Izamar T., Pan, Hsi-An, Pan, Kaike, Parker, James, Paviot, Romain, Peirani, Sebastien, Ramŕez, Karla Peña, Penny, Samantha, Percival, Will J., Perez-Fournon, Ismael, Pérez-Ràfols, Ignasi, Bender, Chad F., Petitjean, Patrick, Pieri, Matthew M., Pinsonneault, Marc, Poovelil, Vijith Jacob, Povick, Joshua Tyler, Prakash, Abhishek, Price-Whelan, Adrian M., Raddick, M. Jordan, Raichoor, Anand, Ray, Amy, Bernardi, Mariangela, Rembold, Sandro Barboza, Rezaie, Mehdi, Riffel, Rogemar A., Riffel, Rogério, Rix, Hans-Walter, Robin, Annie C., Roman-Lopes, A., Román-Zúñiga, Carlos, Rose, Benjamin, Ross, Ashley J., Bershady, Matthew, Rossi, Graziano, Rowlands, Kate, Rubin, Kate H. R., Salvato, Mara, Sánchez, Ariel G., Sánchez-Menguiano, Laura, Sánchez-Gallego, José R., Sayres, Conor, Schaefer, Adam, Schiavon, Ricardo P., Beutler, Florian, Schimoia, Jaderson S., Schlafly, Edward, Schlegel, David, Schneider, Donald P., Schultheis, Mathias, Schwope, Axel, Seo, Hee-Jong, Serenelli, Aldo, Shafieloo, Arman, Shamsi, Shoaib Jamal, Bidin, Christian Moni, Shao, Zhengyi, Shen, Shiyin, Shetrone, Matthew, Shirley, Raphael, Aguirre, Víctor Silva, Simon, Joshua D., Skrutskie, M.F., Slosar, Anže, Smethurst, Rebecca, Sobeck, Jennifer, Bird, Jonathan, Sodi, Bernardo Cervantes, Souto, Diogo, Stark, David V., Stassun, Keivan G., Steinmetz, Matthias, Stello, Dennis, Stermer, Julianna, Storchi-Bergmann, Thaisa, Streblyanska, Alina, Stringfellow, Guy S., Bizyaev, Dmitry, Stutz, Amelia, Suárez, Genaro, Sun, Jing, Taghizadeh-Popp, Manuchehr, Talbot, Michael S., Tayar, Jamie, Thakar, Aniruddha R., Theriault, Riley, Thomas, Daniel, Thomas, Zak C., Blanc, Guillermo A., Tinker, Jeremy, Tojeiro, Rita, Toledo, Hector Hernandez, Tremonti, Christy A., Troup, Nicholas W., Tuttle, Sarah, Unda-Sanzana, Eduardo, Valentini, Marica, Vargas-González, Jaime, Vargas-Magaña, Mariana, Blanton, Michael R., Vázquez-Mata, Jose Antonio, Vivek, M., Wake, David, Wang, Yuting, Weaver, Benjamin Alan, Weijmans, Anne-Marie, Wild, Vivienne, Wilson, John C., Wilson, Robert F., Wolthuis, Nathan, Boquien, Médéric, Wood-Vasey, W. M., Yan, Renbin, Yang, Meng, Yèche, Christophe, Zamora, Olga, Zarrouk, Pauline, Zasowski, Gail, Zhang, Kai, Zhao, Cheng, Zhao, Gongbo, Borissova, Jura, Zheng, Zheng, Zheng, Zheng, Zhu, Guangtun, Zou, Hu, Bovy, Jo, Brandt, W. N., Brinkmann, Jonathan, Brownstein, Joel R., Bundy, Kevin, Bureau, Martin, Burgasser, Adam, Burtin, Etienne, Cano-Díaz, Mariana, Capasso, Raffaella, Cappellari, Michele, Carrera, Ricardo, Chabanier, Solène, Chaplin, William, Chapman, Michael, Cherinka, Brian, Chiappini, Cristina, Doohyun Choi, Peter, Chojnowski, S. Drew, Chung, Haeun, Clerc, Nicolas, Coffey, Damien, Comerford, Julia M., Comparat, Johan, da Costa, Luiz, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D., Cunha, Katia, Ilha, Gabriele da Silva, Dai, Yu Sophia, Damsted, Sanna B., Darling, Jeremy, Davidson, James W., Davies, Roger, Dawson, Kyle, De, Nikhil, de la Macorra, Axel, De Lee, Nathan, Queiroz, Anna Bárbara de Andrade, Deconto Machado, Alice, de la Torre, Sylvain, Dell’Agli, Flavia, du Mas des Bourboux, Hélion, Diamond-Stanic, Aleksandar M., Dillon, Sean, Donor, John, Drory, Niv, Duckworth, Chris, Dwelly, Tom, Ebelke, Garrett, Eftekharzadeh, Sarah, Davis Eigenbrot, Arthur, Elsworth, Yvonne P., Eracleous, Mike, Erfanianfar, Ghazaleh, Escoffier, Stephanie, Fan, Xiaohui, Farr, Emily, Fernández-Trincado, José G., Feuillet, Diane, Finoguenov, Alexis, Fofie, Patricia, Fraser-McKelvie, Amelia, Frinchaboy, Peter M., Fromenteau, Sebastien, Fu, Hai, Galbany, Lluís

This paper documents the 16th data release (DR16) from the Sloan Digital Sky Surveys (SDSS), the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of data from the Southern Hemisphere survey of the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new data from APOGEE-2 North are also included. DR16 is also notable as the final data release for the main cosmological program of the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and all raw and reduced spectra from that project are released here. DR16 also includes all the data from the Time Domain Spectroscopic Survey and new data from the SPectroscopic IDentification of ERosita Survey programs, both of which were co-observed on eBOSS plates. DR16 has no new data from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey (or the MaNGA Stellar Library "MaStar"). We also preview future SDSS-V operations (due to start in 2020), and summarize plans for the final SDSS-IV data release (DR17).

2017-6-7, Reindl, Marcus, Jöns, Klaus D., Huber, Daniel, Schimpf, Christian, Huo, Yongheng, Zwiller, Val, Rastelli, Armando, Trotta, Rinaldo

Photonic quantum technologies are on the verge of finding applications in everyday life with quantum cryptography and quantum simulators on the horizon. Extensive research has been carried out to identify suitable quantum emitters and single epitaxial quantum dots have emerged as near-optimal sources of bright, on-demand, highly indistinguishable single photons and entangled photon-pairs. In order to build up quantum networks, it is essential to interface remote quantum emitters. However, this is still an outstanding challenge, as the quantum states of dissimilar “artificial atoms” have to be prepared on-demand with high fidelity and the generated photons have to be made indistinguishable in all possible degrees of freedom. Here, we overcome this major obstacle and show an unprecedented two-photon interference (visibility of 51 ± 5%) from remote strain-tunable GaAs quantum dots emitting on-demand photon-pairs. We achieve this result by exploiting for the first time the full potential of a novel phonon-assisted two-photon excitation scheme, which allows for the generation of highly indistinguishable (visibility of 71 ± 9%) entangled photon-pairs (fidelity of 90 ± 2%), enables push-button biexciton state preparation (fidelity of 80 ± 2%) and outperforms conventional resonant two-photon excitation schemes in terms of robustness against environmental decoherence. Our results mark an important milestone for the practical realization of quantum repeaters and complex multiphoton entanglement experiments involving dissimilar artificial atoms.

2015, Zhang, Jiaxiang, Wildmann, Johannes S., Ding, Fei, Trotta, Rinaldo, Huo, Yongheng, Zallo, Eugenio, Huber, Daniel, Rastelli, Armando, Schmidt, Oliver G.

Triggered sources of entangled photon pairs are key components in most quantum communication protocols. For practical quantum applications, electrical triggering would allow the realization of compact and deterministic sources of entangled photons. Entangled-light-emitting-diodes based on semiconductor quantum dots are among the most promising sources that can potentially address this task. However, entangled-light-emitting-diodes are plagued by a source of randomness, which results in a very low probability of finding quantum dots with sufficiently small fine structure splitting for entangled-photon generation (∼10−2). Here we introduce strain-tunable entangled-light-emitting-diodes that exploit piezoelectric-induced strains to tune quantum dots for entangled-photon generation. We demonstrate that up to 30% of the quantum dots in strain-tunable entangled-light-emitting-diodes emit polarization-entangled photons. An entanglement fidelity as high as 0.83 is achieved with fast temporal post selection. Driven at high speed, that is 400 MHz, strain-tunable entangled-light-emitting-diodes emerge as promising devices for high data-rate quantum applications.