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17 results on '"Tondera A"'

4. Designed Ankyrin Repeat Protein (DARPin) to target chimeric antigen receptor (CAR)-redirected T cells towards CD4+ T cells to reduce the latent HIV+ cell reservoir

Author

Patasic, Lea, primary, Seifried, Janna, additional, Bezler, Valerie, additional, Kaljanac, Marcell, additional, Schneider, Irene C., additional, Schmitz, Heike, additional, Tondera, Christiane, additional, Hartmann, Jessica, additional, Hombach, Andreas, additional, Buchholz, Christian J., additional, Abken, Hinrich, additional, König, Renate, additional, and Cichutek, Klaus, additional

Published
2020
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7. Dephosphorylation of the HIV-1 restriction factor SAMHD1 is mediated by PP2A-B55α holoenzymes during mitotic exit

Author

Schott, Kerstin, primary, Fuchs, Nina V., additional, Derua, Rita, additional, Mahboubi, Bijan, additional, Schnellbächer, Esther, additional, Seifried, Janna, additional, Tondera, Christiane, additional, Schmitz, Heike, additional, Shepard, Caitlin, additional, Brandariz-Nuñez, Alberto, additional, Diaz-Griffero, Felipe, additional, Reuter, Andreas, additional, Kim, Baek, additional, Janssens, Veerle, additional, and König, Renate, additional

Published
2018
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8. REDD1 integrates hypoxia-mediated survival signaling downstream of phosphatidylinositol 3-kinase

Author

Rolf Schwarzer, Klaus Giese, Daniel Tondera, Jörg Kaufmann, Wolfgang Arnold, and Anke Klippel

Subjects
Male, Cancer Research, Morpholines, Gene Expression, Apoptosis, medicine.disease_cause, Phosphatidylinositol 3-Kinases, Growth factor receptor, Cell Line, Tumor, Genetics, medicine, Humans, PTEN, Dimethyl Sulfoxide, Neoplasm Invasiveness, RNA, Antisense, Molecular Biology, Phosphoinositide-3 Kinase Inhibitors, Sirolimus, Phosphoinositide 3-kinase, biology, DDIT4, Prostatic Neoplasms, Cobalt, Hypoxia-Inducible Factor 1, alpha Subunit, Molecular biology, Cell Hypoxia, Up-Regulation, Chromones, Cancer cell, Cancer research, biology.protein, Signal transduction, Carcinogenesis, Signal Transduction, Transcription Factors
Abstract

Cancer cells frequently evade apoptosis during tumorigenesis by acquiring mutations in apoptotic regulators. Chronic activation of the PI 3-kinase-Akt pathway through loss of the tumor suppressor PTEN is one mechanism by which these cells can gain increased protection against apoptosis. We report here that REDD1 (RTP801) can act as a transcriptional downstream target of PI 3-kinase signaling in human prostate cancer cells (PC-3). REDD1 expression is markedly reduced in PC-3 cells treated with LY294002 (LY) or Rapamycin and strongly induced under hypoxic conditions in a hypoxia-inducible factor-1 (HIF-1)-dependent manner. Loss of function studies employing antisense molecules or RNA interference indicate that REDD1 is essential for invasive growth of prostate cancer cells in vitro and in vivo. Reduced REDD1 levels can sensitize cells towards apoptosis, whereas elevated levels of REDD1 induced by hypoxia or overexpression desensitize cells to apoptotic stimuli. Taken together our data designate REDD1 as a novel target for therapeutic intervention in prostate cancer.

Published
2004

10. Proceedings of the Frontiers of Retrovirology Conference 2016

Author

Zurnic, Irena, primary, Hütter, Sylvia, additional, Lehmann, Ute, additional, Stanke, Nicole, additional, Reh, Juliane, additional, Kern, Tobias, additional, Lindel, Fabian, additional, Gerresheim, Gesche, additional, Hamann, Martin, additional, Müllers, Erik, additional, Lesbats, Paul, additional, Cherepanov, Peter, additional, Serrao, Erik, additional, Engelman, Alan, additional, Lindemann, Dirk, additional, Da Silva Santos, Claire, additional, Tartour, Kevin, additional, Cimarelli, Andrea, additional, Burdick, Rya, additional, Chen, Jianbo, additional, Sastri, Jaya, additional, Hu, Wei-Shau, additional, Pathak, Vinay, additional, Keppler, Oliver T., additional, Pradeau, Karine, additional, Eiler, Sylvia, additional, Levy, Nicolas, additional, Lennon, Sarah, additional, Cianferani, Sarah, additional, Emiliani, Stéphane, additional, Ruff, Marc, additional, Parissi, Vincent, additional, Rato, Sylvie, additional, Rausell, Antonio, additional, Munoz, Miguel, additional, Telenti, Amalio, additional, Ciuffi, Angela, additional, Zhyvoloup, Alexander, additional, Melamed, Anat, additional, Anderson, Ian, additional, Planas, Delphine, additional, Kriston-Vizi, Janos, additional, Ketteler, Robin, additional, Lee, Chen- Hsuin, additional, Merritt, Andy, additional, Ancuta, Petronela, additional, Bangham, Charles, additional, Fassati, Ariberto, additional, Rodari, Anthony, additional, Van Driessche, Benoit, additional, Galais, Mathilde, additional, Delacourt, Nadége, additional, Fauquenoy, Sylvain, additional, Vanhulle, Caroline, additional, Kula, Anna, additional, Burny, Arsène, additional, Rohr, Olivier, additional, Van Lint, Carine, additional, van Montfort, Thijs, additional, van der Sluis, Renee, additional, Speijer, Dave, additional, Berkhout, Ben, additional, Meng, Bo, additional, Rutkowski, Andrzej, additional, Berry, Neil, additional, Dölken, Lars, additional, Lever, Andrew, additional, Schuster, Thomas, additional, Asbach, Benedikt, additional, Wagner, Ralf, additional, Gross, Christine, additional, Wiesmann, Veit, additional, Kalmer, Martina, additional, Wittenberg, Thomas, additional, Gettemans, Jan, additional, Thoma-Kress, Andrea K., additional, Li, Minghua, additional, Freed, Eric O., additional, Liu, Shan-Lu, additional, Müller, Janis, additional, Münch, Jan, additional, Sewald, Xaver, additional, Uchil, Pradeep, additional, Ladinsky, Mark, additional, Beloor, Jagadish, additional, Pi, Ruoxi, additional, Herrmann, Christin, additional, Motamedi, Nasim, additional, Murooka, Thomas, additional, Brehm, Michael, additional, Greiner, Dale, additional, Mempel, Thorsten, additional, Bjorkman, Pamela, additional, Kumar, Priti, additional, Mothes, Walther, additional, Joas, Simone, additional, Parrish, Erica, additional, Gnanadurai, Clement Wesley, additional, Lump, Edina, additional, Stürzel, Christina M., additional, Parrish, Nicholas F., additional, Sauermann, Ulrike, additional, Töpfer, Katharina, additional, Schultheiss, Tina, additional, Bosinger, Steven, additional, Silvestri, Guido, additional, Apetrei, Cristian, additional, Huot, Nicholas, additional, Müller-Trutwin, Michaela, additional, Sauter, Daniel, additional, Hahn, Beatrice H., additional, Stahl-Hennig, Christiane, additional, Kirchhoff, Frank, additional, Schumann, Gerald, additional, Jung-Klawitter, Sabine, additional, Fuchs, Nina V., additional, Upton, Kyle R., additional, Muñoz-Lopez, Martin, additional, Shukla, Ruchi, additional, Wang, Jichang, additional, Garcia-Canadas, Marta, additional, Lopez-Ruiz, Cesar, additional, Gerhardt, Daniel J., additional, Sebe, Attila, additional, Grabundzija, Ivana, additional, Gerdes, Patricia, additional, Merkert, Sylvia, additional, Pulgarin, Andres, additional, Bock, Anja, additional, Held, Ulrike, additional, Witthuhn, Anett, additional, Haase, Alexandra, additional, Wolvetang, Ernst J., additional, Martin, Ulrich, additional, Ivics, Zoltán, additional, Izsvák, Zsuzsanna, additional, Garcia-Perez, J., additional, Faulkner, Geoffrey J., additional, Hurst, Tara, additional, Katzourakis, Aris, additional, Magiorkinis, Gkikas, additional, Schott, Kerstin, additional, Derua, Rita, additional, Seifried, Janna, additional, Reuter, Andreas, additional, Schmitz, Heike, additional, Tondera, Christiane, additional, Brandariz-Nuñez, Alberto, additional, Diaz-Griffero, Felipe, additional, Janssens, Veerle, additional, König, Renate, additional, Baldauf, Hanna-Mari, additional, Stegmann, Lena, additional, Schwarz, Sarah-Marie, additional, Trotard, Maud, additional, Martin, Margarethe, additional, Lenzi, Gina, additional, Burggraf, Manja, additional, Pan, Xiaoyu, additional, Fregoso, Oliver I., additional, Lim, Efrem S., additional, Abraham, Libin, additional, Erikson, Elina, additional, Nguyen, Laura, additional, Ambiel, Ina, additional, Rutsch, Frank, additional, Kim, Baek, additional, Emerman, Michael, additional, Fackler, Oliver T., additional, Wittmann, Sabine, additional, Behrendt, Rayk, additional, Volkmann, Bianca, additional, Eissmann, Kristin, additional, Gramberg, Thomas, additional, Bolduan, Sebastian, additional, Koppensteiner, Herwig, additional, Regensburg, Stefanie, additional, Brack-Werner, Ruth, additional, Draenert, Rika, additional, Schindler, Michael, additional, Ducroux, Aurélie, additional, Xu, Shuting, additional, Ponnurangam, Aparna, additional, Franz, Sergej, additional, Malassa, Angelina, additional, Ewald, Ellen, additional, Goffinet, Christine, additional, Fung, Sin-Yee, additional, Chan, Ching-Ping, additional, Yuen, Chun-Kit, additional, Kok, Kin-Hang, additional, Chan, Chin-Ping, additional, Jin, Dong-Yan, additional, Dittmer, Ulf, additional, Kmiec, Dorota, additional, Iyer, Shilpa, additional, Stürzel, Christina, additional, Hahn, Beatrice, additional, Ariumi, Yasuo, additional, Yasuda-Inoue, Mariko, additional, Kawano, Koudai, additional, Tateishi, Satoshi, additional, Turelli, Priscilla, additional, Compton, Alex, additional, Roy, Nicolas, additional, Porrot, Françoise, additional, Billet, Anne, additional, Casartelli, Nicoletta, additional, Yount, Jacob, additional, Liang, Chen, additional, Schwartz, Oliver, additional, Magnus, Carsten, additional, Reh, Lucia, additional, Moore, Penny, additional, Uhr, Therese, additional, Weber, Jacqueline, additional, Morris, Lynn, additional, Trkola, Alexandra, additional, Grindberg, Rashel V., additional, Schlaepfer, Erika, additional, Schreiber, Gideon, additional, Simon, Viviana, additional, Speck, Roberto F., additional, Debyser, Zeger, additional, Vranckx, Lenard, additional, Demeulemeester, Jonas, additional, Saleh, Suha, additional, Verdin, Eric, additional, Cereseto, Anna, additional, Christ, Frauke, additional, Gijsbers, Rik, additional, Wang, Gang, additional, Zhao, Na, additional, Das, Atze T., additional, Köstler, Josef, additional, Perdiguero, Beatriz, additional, Esteban, Mariano, additional, Jacobs, Bertram L., additional, Montefiori, David C., additional, LaBranche, Celia C., additional, Yates, Nicole L., additional, Tomaras, Georgia D., additional, Ferrari, Guido, additional, Foulds, Kathryn E., additional, Roederer, Mario, additional, Landucci, Gary, additional, Forthal, Donald N., additional, Seaman, Michael S., additional, Hawkins, Natalie, additional, Self, Steven G., additional, Phogat, Sanjay, additional, Tartaglia, James, additional, Barnett, Susan W., additional, Burke, Brian, additional, Cristillo, Anthony D., additional, Ding, Song, additional, Heeney, Jonathan L., additional, Pantaleo, Giuseppe, additional, Stab, Viktoria, additional, Ensser, Armin, additional, Tippler, Bettina, additional, Burton, Dennis, additional, Tenbusch, Matthias, additional, Überla, Klaus, additional, Alter, Galit, additional, Lofano, Giuseppe, additional, Dugast, Anne-Sophie, additional, Kulkarni, Viraj, additional, Suscovich, Todd, additional, Opazo, Tatiana, additional, Barraza, Felipe, additional, Herrera, Diego, additional, Garces, Andrea, additional, Schwenke, Tomas, additional, Tapia, Diego, additional, Cancino, Jorge, additional, Arriagada, Gloria, additional, Haußner, Christina, additional, Damm, Dominik, additional, Rohrhofer, Anette, additional, Schmidt, Barbara, additional, Eichler, Jutta, additional, Midgley, Rebecca, additional, Wheeldon, James, additional, Piguet, Vincent, additional, Khopkar, Priyanka, additional, Rohamare, Megha, additional, Kulkarni, Smita, additional, Godinho-Santos, Ana, additional, Hance, Allan, additional, Goncalves, Joao, additional, Mammano, Fabrizio, additional, Gasser, Romain, additional, Hamoudi, Meriem, additional, Pellicciotta, Martina, additional, Zhou, Zhicheng, additional, Visdeloup, Clara, additional, Colin, Philippe, additional, Braibant, Martine, additional, Lagane, Bernard, additional, Negroni, Matteo, additional, Wamara, Jula, additional, Bannert, Norbert, additional, Mesplede, Thibault, additional, Osman, Nathan, additional, Anstett, Kaitlin, additional, Liang, Jiaming Calvin, additional, Pham, Hanh Thi, additional, Wainberg, Mark, additional, Shao, Wei, additional, Shan, Jigui, additional, Kearney, Mary, additional, Wu, Xiaolin, additional, Maldarelli, Frank, additional, Mellors, John, additional, Luke, Brian, additional, Coffin, John, additional, Hughes, Stephen, additional, Fricke, Thomas, additional, Opp, Silvana, additional, Shepard, Caitlin, additional, Ivanov, Dmitri, additional, Valle-Casuso, Jose, additional, Kanja, Marine, additional, Cappy, Pierre, additional, Lener, Daniela, additional, Knyazhanskaya, Ekaterina, additional, Anisenko, Andrey, additional, Zatsepin, Timofey, additional, Gottikh, Marina, additional, Komkov, Alexander, additional, Minervina, Anastasia, additional, Nugmanov, Gaiaz, additional, Nazarov, Vadim, additional, Khodosevich, Konstantin, additional, Mamedov, Ilgar, additional, Lebedev, Yuri, additional, Colomer-Lluch, Marta, additional, Serra-Moreno, Ruth, additional, Sarracino, Ambra, additional, Gharu, Lavina, additional, Pasternak, Alexander, additional, Marcello, Alessandro, additional, McCartin, Ann Marie, additional, Kulkarni, Anurag, additional, Le Douce, Valentin, additional, Gautier, Virginie, additional, Baeyens, Ann, additional, Naessens, Evelien, additional, Van Nuffel, Anouk, additional, Weening, Karin, additional, Reilly, Anne- Marie, additional, Claeys, Eva, additional, Trypsteen, Wim, additional, Vandekerckhove, Linos, additional, Eyckerman, Sven, additional, Gevaert, Kris, additional, Verhasselt, Bruno, additional, Mok, Hoi Ping, additional, Norton, Nicholas, additional, Fun, Axel, additional, Hirst, Jack, additional, Wills, Mark, additional, Miklik, Dalibor, additional, Senigl, Filip, additional, Hejnar, Jiri, additional, Sakuragi, Jun-ichi, additional, Sakuragi, Sayuri, additional, Yokoyama, Masaru, additional, Shioda, Tatsuo, additional, Sato, Hironori, additional, Bodem, Jochen, additional, Moschall, Rebecca, additional, Denk, Sarah, additional, Erkelenz, Steffen, additional, Schenk, Christian, additional, Schaal, Heiner, additional, Donhauser, Norbert, additional, Socher, Ellen, additional, Millen, Sebastian, additional, Sticht, Heinrich, additional, Mann, Melanie, additional, Wei, Guochao, additional, Betts, Matthew J., additional, Liu, Yang, additional, Kehl, Timo, additional, Russell, Robert B., additional, Löchelt, Martin, additional, Hohn, Oliver, additional, Mostafa, Saeed, additional, Hanke, Kirsten, additional, Norley, Stephen, additional, Chen, Chia-Yen, additional, Shingai, Masashi, additional, Borrego, Pedro, additional, Taveira, Nuno, additional, Strebel, Klaus, additional, Hellmund, Chris, additional, Friedrich, Melanie, additional, Hahn, Friedrich, additional, Setz, Christian, additional, Rauch, Pia, additional, Fraedrich, Kirsten, additional, Matthaei, Alina, additional, Henklein, Petra, additional, Traxdorf, Maximilian, additional, Fossen, Torgils, additional, Schubert, Ulrich, additional, Khwaja, Aya, additional, Galilee, Meytal, additional, Alian, Akram, additional, Schwalbe, Birco, additional, Hauser, Heiko, additional, Schreiber, Michael, additional, Scherpenisse, Mirte, additional, Cho, Young-Keol, additional, Kim, Jungeun, additional, Jeong, Daeun, additional, Trejbalova, Katerina, additional, Benesova, Martina, additional, Kucerova, Dana, additional, Vernerova, Zdenka, additional, Amouroux, Rachel, additional, Hajkova, Petra, additional, Elleder, Daniel, additional, Hron, Tomas, additional, Farkasova, Helena, additional, Padhi, Abinash, additional, Paces, Jan, additional, Zhu, Henan, additional, Gifford, Robert, additional, Murcia, Pablo, additional, Carrozza, Maria Luisa, additional, Niewiadomska, Anna-Maria, additional, Mazzei, Maurizio, additional, Abi-Said, Mounir, additional, Hughes, Joseph, additional, Hué, Stéphane, additional, Obasa, Adetayo, additional, Jacobs, Graeme, additional, Engelbrecht, Susan, additional, Mack, Katharina, additional, Starz, Kathrin, additional, Geyer, Matthias, additional, Bibollet-Ruche, Frederic, additional, Leoz, Marie, additional, Plantier, Jean Christophe, additional, Argaw-Denboba, Ayele, additional, Balestrieri, Emanuela, additional, Serafino, Annalucia, additional, Bucci, Ilaria, additional, Cipriani, Chiara, additional, Spadafora, Corrado, additional, Sinibaldi-Vallebona, Paolo, additional, Matteucci, Claudia, additional, Jayashree, S. Nandi, additional, Neogi, Ujjwal, additional, Chhangani, Anil K., additional, Rathore, Shravan Sing, additional, Mathur, Bajrang R. J., additional, Abati, Adeyemi, additional, Koç, B. Taylan, additional, Oğuzoğlu, Tuba Çiğdem, additional, Shimauchi, Takatoshi, additional, Caucheteux, Stephan, additional, Turpin, Jocelyn, additional, Finsterbusch, Katja, additional, Tokura, Yoshiki, additional, Souriant, Shanti, additional, Balboa, Luciana, additional, Pingris, Karine, additional, Kviatcowsky, Denise, additional, Raynaud-Messina, Brigitte, additional, Cougoule, Céline, additional, Mercier, Ingrid, additional, Kuroda, Marcelo, additional, González-Montaner, Pablo, additional, Inwentarz, Sandra, additional, Moraña, Eduardo Jose, additional, del Carmen Sasiain, Maria, additional, Neyrolles, Olivier, additional, Maridonneau-Parini, Isabelle, additional, Lugo-Villarino, Geanncarlo, additional, Vérollet, Christel, additional, Herrmann, Alexandra, additional, Thomas, Dominique, additional, Bouzas, Nerea Ferreirós, additional, Lahaye, Xavier, additional, Bhargava, Anvita, additional, Satoh, Takeshi, additional, Gentili, Matteo, additional, Cerboni, Silvia, additional, Silvin, Aymeric, additional, Conrad, Cécile, additional, Ahmed-Belkacem, Hakim, additional, Rodriguez, Elisa C., additional, Guichou, Jean-François, additional, Bosquet, Nathalie, additional, Piel, Matthieu, additional, Le Grand, Roger, additional, King, Megan, additional, Pawlotsky, Jean-Michel, additional, Manel, Nicolas, additional, Hofmann, Henning, additional, Vanwalscappel, Benedicte, additional, Bloch, Nicolin, additional, Landau, Nathaniel, additional, Indik, Stanislav, additional, Hagen, Benedikt, additional, Valle-Casuso, José Carlos, additional, Allouch, Awatef, additional, David, Annie, additional, Barré-Sinoussi, Françoise, additional, Benkirane, Monsef, additional, Pancino, Gianfranco, additional, Saez-Cirion, Asier, additional, Lee, Wing-Yiu, additional, Sloan, Richard, additional, Schulte, Bianca, additional, Blomberg, Jonas, additional, Vargiu, Luana, additional, Rodriguez-Tomé, Patricia, additional, Tramontano, Enzo, additional, Sperber, Göran, additional, Kumari, Namita, additional, Ammosova, Tatiana, additional, Diaz, Sharmeen, additional, Oneal, Patricia, additional, Nekhai, Sergei, additional, Fahrny, Audrey, additional, Gers-Huber, Gustavo, additional, Audigé, Annette, additional, Jayaprakash, Anitha, additional, Sachidanandam, Ravi, additional, Hernandez, Matt, additional, Dillon-White, Marsha, additional, Maze, Emmanuel, additional, Ham, Claire, additional, Almond, Neil, additional, Towers, Greg, additional, Belshaw, Robert, additional, de Sousa-Pereira, Patrícia, additional, Abrantes, Joana, additional, Pizzato, Massimo, additional, Esteves, Pedro J., additional, Kahle, Tanja, additional, Schmitt, Sven, additional, Merkel, Laura, additional, Reuter, Nina, additional, Stamminger, Thomas, additional, Rosa, Ilaria Dalla, additional, Bishop, Kate, additional, Spinazzola, Antonella, additional, Groom, Harriet, additional, Vieyres, Gabrielle, additional, Müsken, Mathias, additional, Zillinger, Thomas, additional, Hornung, Veit, additional, Barchet, Winfried, additional, Häussler, Susanne, additional, Pietschmann, Thomas, additional, Javed, Aneela, additional, Leuchte, Nicole, additional, Salinas, Gabriela, additional, Opitz, Lennart, additional, Sopper, Sieghart, additional, Mummert, Christiane, additional, Hofmann, Christian, additional, Hückelhoven, Angela G., additional, Bergmann, Silke, additional, Müller-Schmucker, Sandra M., additional, Harrer, Ellen G., additional, Dörrie, Jan, additional, Schaft, Niels, additional, Harrer, Thomas, additional, Cardinaux, Laure, additional, Zahno, M.- L., additional, Vogt, H.- R., additional, Zanoni, R., additional, Bertoni, G., additional, Muenchhoff, Maximilian, additional, Goulder, Philip, additional, Keppler, Oliver, additional, Rebensburg, Stephanie, additional, Helfer, Markus, additional, Zhang, Yuwei, additional, Chen, Huicheng, additional, Bernier, Annie, additional, Gosselin, Annie, additional, Routy, Jean- Pierre, additional, Wöhrl, Birgitta, additional, Schneider, Anna, additional, Corona, Angela, additional, Spöring, Imke, additional, Jordan, Mareike, additional, Buchholz, Bernd, additional, Maccioni, Elias, additional, Di Santo, Roberto, additional, Schweimer, Kristian, additional, Schölz, Christian, additional, Weinert, Brian, additional, Wagner, Sebastian, additional, Beli, Petra, additional, Miyake, Yasuyuki, additional, Qi, Jun, additional, Jensen, Lars, additional, Streicher, Werner, additional, McCarthy, Anna, additional, Westwood, Nicholas, additional, Lain, Sonia, additional, Cox, Jürgen, additional, Matthias, Patrick, additional, Mann, Matthias, additional, Bradner, James, additional, Choudhary, Chunaram, additional, Stern, Marcel, additional, Valletta, Elena, additional, Frezza, Caterina, additional, Marino-Merlo, Francesca, additional, Grelli, Sandro, additional, Serafino, Anna Lucia, additional, Mastino, Antonio, additional, Macchi, Beatrice, additional, Kaulfuß, Meike, additional, Windmann, Sonja, additional, Bayer, Wibke, additional, Mikasi, Sello, additional, Heß, Rebecca, additional, Bonsmann, Michael Storcksdieck gen., additional, Kirschning, Carsten, additional, Lepenies, Bernd, additional, Kolenbrander, Anne, additional, Temchura, Vladimir, additional, Iijima, Kenta, additional, Kobayashi, Junya, additional, and Ishizaka, Yukihito, additional

Published
2016
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11. Measurement of exchange and spin-orbit effects and their interference in elastic e-Cs scattering at 7 eV

Author

M. Tondera, L. Grau, R. Niemeyer, Wilhelm Raith, Günter Baum, and B. Leuer

Subjects
Physics, Scattering, media_common.quotation_subject, chemistry.chemical_element, Observable, Electron, Interference (wave propagation), Asymmetry, Atomic and Molecular Physics, and Optics, chemistry, Caesium, Atomic physics, Spin (physics), Electron scattering, media_common
Abstract

Twenty years ago a theoretical analysis showed that electron scattering by high-Z one-electron atoms might lead to interference of exchange and spin-orbit interactions at low electron energies, observable as a cross-section asymmetry if unpolarized electrons are scattered by polarized cesium atoms. By using a highly polarized cesium atomic beam, we studied exchange and spin-orbit effects at different electron energies, starting at 20 eV and going down. We observed the first distinctly non-zero interference asymmetry at 7 eV: Over the angular range of 35 to 145 degrees, it varies between +0.02 and -0.02 and goes through zero near 110 degrees being negative at larger angles.

Published
1995

12. Variational pair theory of the attractive and extended Hubbard model ind-dimensions

Author

J. Mählmann, M. Tondera, Johannes Pollmann, and W. Aulbur

Subjects
Physics, Hubbard model, Fermion, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, symbols.namesake, Nonlinear system, Quantum mechanics, symbols, Condensed Matter::Strongly Correlated Electrons, General Materials Science, Fundamental Resolution Equation, Wave function, Hamiltonian (quantum mechanics), Ground state, Mathematical physics, Ansatz
Abstract

We present a variational approach for treating the Hubbard Hamiltonian in one, two and three dimensions. It is based on 2M-fermion wavefunctions which are allowed to form correlated spin-singlet pairs. Expressions for the ground state energy and correlation functions are derived in terms of general pair coefficient functions. The presented approach offers a convenient starting point for improved variational treatments that allow to include different specific types of pair correlations. We present first applications to the attractive and to the extended Hubbard model using a very simple ansatz for the pair coefficient functions. The ground state energy, chemical potential, order parameter, momentum distribution as well as spin-spin and density-density correlation functions follow from a system of coupled nonlinear equations that has to be solved selfconsistently. All quantities are given for arbitrary band-filling in one, two and three dimensions. Our results are compared with those of other approximations and for the one-dimensional case with the exact results of Krivnov and Ovchinnikov.

Published
1994

13. An optically pumped, highly polarized cesium beam for the study of spin-dependent electron scattering

Author

S. Hesse, Karsten Rott, Wilhelm Raith, B. Leuer, B. Granitza, B. Witthuhn, M. Tondera, and Günter Baum

Subjects
Zeeman effect, Materials science, Scattering, business.industry, Mott scattering, Polarization (waves), Laser, Atomic and Molecular Physics, and Optics, law.invention, Optical pumping, symbols.namesake, Optics, law, symbols, Radial polarization, Physics::Atomic Physics, Atomic physics, business, Circular polarization
Abstract

We have set up an atomic beam of cesium for the study of spin-dependent electron-cesium scattering. The beam is produced by an effusive oven with continuous recirculation of the condensed metal. The beam is optically pumped by circularly polarized light from two laser diodes tuned to the 6(2)S1/2(F = 3) --> 6(2)P3/2(F' = 4) and 6(2)S1/2(F = 4) --> 6(2)P3/2(F' = 5) transitions, respectively. Nearly all atoms are transferred into the F = 4, m(F) = +4 or m(F) = -4 Zeeman level of the ground state, depending on the sense of circular polarization of the pumping light. The population distribution in the optically pumped beam is analyzed in terms of the m(J) = - 1/2 and m(J) = + 1/2 components with a Stern-Gerlach magnet. We find the atomic polarization to be very close to unity at a density of 8 x 10(8) atoms/cm3 in the scattering center. The polarization decreases slightly with increasing density of the cesium beam due to radiation trapping. A spin flipper serves as a means of polarization reversal, introducing no systematic errors in the spin asymmetry measurements. Lock-in technique is used to stabilize the atomic beam polarization by detecting fluorescence light signals.

Published
1991

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