Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Holger Friedrich Hofmann"'
Autor:
Holger Friedrich Hofmann, Osamu Kawakubo, Joachim Knittel, Jochen Hellmig, Hartmut Richter, Toshiyuki Kashiwagi, Andrei Mijiritskii
Publikováno v:
Japanese Journal of Applied Physics. 42:956-960
In this publication, key technologies for blue laser recording and dual layer phase-change disks with a total capacity of 50 Gbytes are explained and system margins are evaluated. Key challenges are the phase-change recording layer design, a robust r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::068b114f5b8d6e39a57d6c7f5dfb50c2
https://doi.org/10.1143/jjap.42.956
https://doi.org/10.1143/jjap.42.956
Publikováno v:
International Quantum Electronics Conference, 2005..
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9039f2b89c25c4c7797aa3189d10046f
https://doi.org/10.1109/iqec.2005.1561075
https://doi.org/10.1109/iqec.2005.1561075
Publikováno v:
Quantum Communications and Quantum Imaging II.
A scheme to distinguish entangled two-photon-polarization states (ETP) from two independent it entangled one-photon-polarization states is proposed. Using this scheme, the experimental generation of ETP by parametric down-conversion is confirmed thro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a0827db659110b786ca2faacf819f51
https://doi.org/10.1117/12.562101
https://doi.org/10.1117/12.562101
Autor:
Holger Friedrich Hofmann
Publikováno v:
Physical Review A. 70
It is shown that coherent superpositions of two oppositely polarized n-photon states can be created by post-selecting the transmission of n independently generated photons into a single mode transmission line. It is thus possible to generate highly n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3979b362c83984761fb68316e5fb6ae
https://doi.org/10.1103/physreva.70.023812
https://doi.org/10.1103/physreva.70.023812
We investigate the single mode operation of a quantum optical nonlinear \pi phase shift gate implemented by a single two-level atom in one-dimensional free space. Since the single mode property of the input photons at the atom is not preserved in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2376a641e0031f89ea45b873caca87e
http://arxiv.org/abs/quant-ph/0405121
http://arxiv.org/abs/quant-ph/0405121
Publikováno v:
Nonlinear Optics: Materials, Fundamentals and Applications.
We investigate the effects of dephasing on the nonlinear phase shift obtained from a one-dimensional atom. A maximal 180° phase shift is obtained for atomic dephasing rate smaller than the coherent atom-field coupling rate.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b070036dab473b8d06b7276fad58cd06
https://doi.org/10.1364/nlo.2004.wd12
https://doi.org/10.1364/nlo.2004.wd12
Publikováno v:
Physical Review A. 68
The nonlinear photon-photon interaction mediated by a single two-level atom is studied theoretically based on a one-dimensional model of the field-atom interaction. This model allows us to determine the effects of an atomic nonlinearity on the spatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82e32ce306fff13e816a17fd899d432a
https://doi.org/10.1103/physreva.68.013803
https://doi.org/10.1103/physreva.68.013803
Autor:
Holger Friedrich Hofmann
Publikováno v:
Physical Review A. 67
The effects of any quantum measurement can be described by a collection of measurement operators {M_m} acting on the quantum state of the measured system. However, the Hilbert space formalism tends to obscure the relationship between the measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::687895de4cce805f2916d72e20d6a31d
https://doi.org/10.1103/physreva.67.022106
https://doi.org/10.1103/physreva.67.022106
Publikováno v:
2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665).
A fully quantum mechanical model of field propagation is applied to describe the effects of the nonlinearity on a two photon quantum state in free space. The spatiotemporal entanglement is then characterized that results from the interaction between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb727e8ec7c6e4a186aefb5dab3a7b41
https://doi.org/10.1109/eqec.2003.1314199
https://doi.org/10.1109/eqec.2003.1314199
We show that the density matrix of a spin-l system can be described entirely in terms of the measurement statistics of projective spin measurements along a minimum of 4l+1 different spin directions. It is thus possible to represent the complete quant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd176cc092df1b20b0334d54b54c2d3b