326,894 research outputs found
Classical scaling theory of quantum resonances
No full textThe quantum resonances occurring with delta-kicked particles are studied with the help of a fictitious classical limit, establishing a direct correspondence between the nearly resonant quantum motion and the classical resonances of a related system. A scaling law which characterizes the structure of the resonant peaks is derived and numerically demonstrated
Ellen Fishman Trachtenberg oral history interview and transcript
No full textThis recording and transcript form part of a collection of oral history interviews conducted as part of the Houston Jewish History Archive.Ellen Fishman Trachtenberg was born in New Orleans, Louisiana in 1945. After spending two years at Newcomb College, she graduated from the University of Texas in 1967. She then moved to Houston and began work as a computer programmer analyst. In 1971, she married Dan Trachtenberg, an attorney from Seminole, Oklahoma, and they raised three sons. In the late 1970s she became involved in the Soviet Jewry movement, holding numerous positions in the community, including Chair of the Soviet Jewry committee for the Jewish Federation, Chair for Soviet Jewry at Congregation Beth Yeshurun, and an officer for Houston Action for Soviet Jewry. These committees were under the auspices of the National Conference for Soviet Jewry and Union of Councils for Soviet Jewry. Ellen has traveled to Russia twice, once in 1985 to visit with Jewish refuseniks who were trying to leave the Soviet Union and in the early 2000’s with a Jewish Federation mission to help and learn about the conditions of Jews still living in the country. Trachtenberg later took positions at Holocaust Museum Houston as a vice chair on the board of trustees and co-chair of the Content and Scope Committee. As part of her work at the museum, she interviewed dozens of Holocaust survivors and liberators, in order to preserve their oral histories for future generations and for use in the exhibits at the museum. Ellen and her husband have lived for many years in the Fondren Southwest neighborhood in Houston.
In the interview, Ellen describes her upbringing in New Orleans and how her family emigrated to Louisiana. She discusses working as a female computer programmer analyst in the late 1960s, living in the Fondren Southwest neighborhood with her husband and children, and her activism for the plight of Soviet Jews. Ellen reflects on her trip to the Soviet Union and recalls countless stories about her experiences there. She then elaborates on her continual involvement with Holocaust Museum Houston throughout the years, from its founding to the present day. She talks about the respect and love she has for the survivors she has known and the effect they have had on her life. As the interview concludes, she speaks about her book and the ongoing debate of what a Holocaust museum should look like today
Samuel Fishman, Ph.D.'s Quick Files
No full textThe Quick Files feature was discontinued and it’s files were migrated into this Project on March 11, 2022. The file URL’s will still resolve properly, and the Quick Files logs are available in the Project’s Recent Activity
Quantum resonances and decoherence for delta-kicked atoms
No full textThe quantum resonances occurring with delta-kicked atoms when the kicking period is an integer multiple of the half-Talbot time are analysed in detail. Exact results about the momentum distribution at exact resonance are established, both in the case of totally coherent dynamics and in the case when decoherence is induced by spontaneous emission. A description of the dynamics when the kicking period is close to, but not exactly at resonance, is derived by means of a quasi-classical approximation where the detuning from exact resonance plays the role of the Planck constant. In this way scaling laws describing the shape of the resonant peaks are obtained. Such analytical results are supported by extensive numerical simulations, and explain some recent surprising experimental observations
Samuel Fishman, Ph.D.'s Quick Files
No full textThe Quick Files feature was discontinued and it’s files were migrated into this Project on March 11, 2022. The file URL’s will still resolve properly, and the Quick Files logs are available in the Project’s Recent Activity
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