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2015-03-02
07:29
Laser-induced cooling of broadband heat reservoirs / Gelbwaser-Klimovsky, D ; Szczygielski, K ; Vogl, U ; Saß, A ; Alicki, R ; Kurizki, G ; Weitz, M
We explore, theoretically and experimentally, a method for cooling a broadband heat reservoir, via its laser-assisted collisions with two-level atoms followed by their fluorescence. This method is shown to be advantageous compared to existing laser-cooling methods in terms of its cooling efficiency, the lowest attainable temperature for broadband baths and its versatility: it can cool down any heat reservoir, provided the laser is red-detuned from the atomic resonance. [...]
arXiv:1502.08019.- 2015 - Published in : Phys. Rev. A 91 (2015) 023431 External link: Preprint

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2015-03-02
07:29
Self-healing organic-dye-based random lasers / Anderson, Benjamin R ; Gunawidjaja, Ray ; Eilers, Hergen
One of the primary difficulties in the implementation of organic-dye-based random lasers is the tendency of organic dyes to irreversibly photodecay. In this letter we report the observation of "reversible" photodegradation in a Rhodamine 6G and ZrO$_2$ nanoparticle doped polyurethane random laser. [...]
arXiv:1502.07998.- 2015 - 5 p. - Published in : Opt. Lett. 40 (2015) 577-580 External link: Preprint

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2015-03-02
07:29
Effect of experimental parameters on optimal transmission of light through opaque media / Anderson, Benjamin R ; Gunawidjaja, Ray ; Eilers, Hergen
Spatial light modulator (SLM) controlled transmission of light through opaque media is a relatively new experimental method with wide applications in various fields. While there has been a surge in research into the technique, there has been little work reported considering the effects of various experimental parameters on the efficiency of optimization. [...]
arXiv:1502.07985.- 2015 - 12 p. - Published in : Phys. Rev. A 90 (2014) 053826 External link: Preprint

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2015-03-02
07:29
Non-Perturbative Theory of Dispersion Interactions / Boström, M ; Thiyam, P ; Persson, C ; Parsons, D F ; Buhmann, S Y ; Brevik, I ; Sernelius, Bo E
Some open questions exist with fluctuation-induced forces between extended dipoles. Conventional intuition derives from large-separation perturbative approximations to dispersion force theory. [...]
arXiv:1502.07850.- 2015 - 9 p. - Published in : Phys. Scr. 90 (2015) 035405 External link: Preprint

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2015-03-02
07:29
R\'enyi generalizations of quantum information measures / Berta, Mario ; Seshadreesan, Kaushik P ; Wilde, Mark M
Quantum information measures such as the entropy and the mutual information find applications in physics, e.g., as correlation measures. Generalizing such measures based on the R\'enyi entropies is expected to enhance their scope in applications. [...]
arXiv:1502.07977.- 2015 - 9 p. - Published in : Physical Review A vol. 91, no. 2, page 022333, February 2015 External link: Preprint

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2015-03-02
07:28
Non-perturbative improvement and renormalization of the axial current in N_f=3 lattice QCD / Bulava, John ; Della Morte, Michele ; Heitger, Jochen ; Wittemeier, Christian
We report on a non-perturbative computation of the renormalization factor Z_A of the axial vector current in three-flavour O(a) improved lattice QCD with Wilson quarks and tree-level Symanzik improved gauge action and also recall our recent determination of the improvement coefficient c_A. Our normalization and improvement conditions are formulated at constant physics in a Schr\"odinger functional setup. [...]
arXiv:1502.07773; MS-TP-15-04.- 2015 - 10 p. External link: Preprint

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2015-03-02
07:27
The Raychaudhuri equation for spinning test particles / Mohseni, Morteza
We obtain generalized Raychaudhuri equations for spinning test particles corresponding to congruences of particle's world-lines, momentum, and spin. These are physical examples of the Raychaudhuri equation for a non-normalized vector, unit time-like vector, and unit space-like vector. [...]
arXiv:1502.07833.- 2015 - 9 p. - Published in : Gen. Relativ. Gravit. (2015) 47:24 External link: Preprint

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2015-03-02
07:27
James Webb Space Telescope segment phasing using differential optical transfer functions / Codona, Johanan L ; Doble, Nathan
Differential Optical Transfer Function (dOTF) is an image-based, non-iterative wavefront sensing method that uses two star images with a single small change in the pupil. We describe two possible methods for introducing the required pupil modification to the JWST, one using a small (<lambda/4) displacement of a single segment's actuator and another that uses small misalignments of NIRCam's filter wheel. [...]
arXiv:1502.08004.- 2015 - 14 p. - Published in : J. Astron. Telesc. Instrum. Syst. 1(2), 029001 (Feb 26, 2015) External link: Preprint

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2015-03-02
07:27
A theoretical room-temperature line list for 15NH3 / Yurchenko, Sergei N
A new room temperature line list for $^{15}$NH$_3$ is presented. This line list comprised of transition frequencies and Einstein coefficients has been generated using the `spectroscopic' potential energy surface NH3-Y2010 and an ab initio dipole moment surface. [...]
arXiv:1502.07975.- 2015 - 22 p. - Published in : J. Quant. Spectrosc. Radiat. Transf. 2 (2015) 28-36 External link: Preprint

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2015-03-02
07:27
Test of the string loop oscillation model using kHz quasiperiodic oscillations in a neutron star binary / Stuchlík, Zdeněk ; Kološ, Martin
The model of current-carrying string loop oscillations is tested to explain the special set of frequencies related to the high-frequency quasiperiodic oscillations (HF QPOs) observed recently in the low-mass X-ray binary XTE J1701-407 containing a neutron star. The external geometry of the neutron star is approximated by the Kerr geometry, introducing errors not exceeding $10~\%$ for slowly rotating massive neutron stars. [...]
arXiv:1502.07841.- 2015 - 24 p. - Published in : General Relativity and Gravitation, Volume 47, Issue 3, 2015 External link: Preprint

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