Zobrazeno 1 - 10
of 967
pro vyhledávání: '"Pucher, P"'
Given an undirected graph, the stable set problem asks to determine the cardinality of the largest subset of pairwise non-adjacent vertices. This value is called the stability number of the graph, and its computation is an NP-hard problem. In this pa
Externí odkaz:
http://arxiv.org/abs/2405.12845
Autor:
Pucher, Thomas, Puebla, Sergio, Zamora, Victor, Viso, Estrella Sánchez, Rouco, Victor, Leon, Carlos, Garcia-Hernandez, Mar, Santamaria, Jacobo, Munuera, Carmen, Castellanos-Gomez, Andres
We present the electrostatic control of photoluminescence of monolayer MoS$_2$ at room temperature via integration of free-standing BaTiO$_3$ (BTO), a ferroelectric perovskite oxide, layers. We show that the use of BTO leads to highly tunable exciton
Externí odkaz:
http://arxiv.org/abs/2405.05862
Autor:
Pucher, Dunja, Rendl, Franz
We propose a class of new cutting planes to strengthen the Lov\'asz theta function, a well-known semidefinite programming (SDP) relaxation for the stable set and the graph coloring problems. For both problems, we introduce two new cutting planes that
Externí odkaz:
http://arxiv.org/abs/2401.17069
Autor:
Pucher, S., Klüsener, V., Spriestersbach, F., Geiger, J., Schindewolf, A., Bloch, I., Blatt, S.
Publikováno v:
Physical Review Letters 132, 150605 (2024)
We demonstrate coherent control of the fine-structure qubit in neutral strontium atoms. This qubit is encoded in the metastable $^3\mathrm{P}_2$ and $^3\mathrm{P}_0$ states, coupled by a Raman transition. Using a magnetic quadrupole transition, we de
Externí odkaz:
http://arxiv.org/abs/2401.11054
Autor:
Klüsener, V., Pucher, S., Yankelev, D., Trautmann, J., Spriestersbach, F., Filin, D., Porsev, S. G., Safronova, M. S., Bloch, I., Blatt, S.
Publikováno v:
Physical Review Letters 132, 253201 (2024)
We report on the coherent excitation of the ultranarrow $^{1}\mathrm{S}_0$-$^{3}\mathrm{P}_2$ magnetic quadrupole transition in $^{88}\mathrm{Sr}$. By confining atoms in a state insensitive optical lattice, we achieve excitation fractions of 97(1)% a
Externí odkaz:
http://arxiv.org/abs/2401.03934
Autor:
Povh, Janez, Pucher, Dunja
We assess the performance of D-wave quantum solvers for solving the stable set problem in a graph, one of the most studied NP-hard problems. We perform computations on some instances from the literature with up to 125 vertices and compare the quality
Externí odkaz:
http://arxiv.org/abs/2308.13041
Autor:
Tebbenjohanns, Felix, Jia, Jihao, Antesberger, Michael, Prasad, Adarsh Shankar, Pucher, Sebastian, Rauschenbeutel, Arno, Volz, Jürgen, Schneeweiss, Philipp
Tapered optical fibers (TOFs) are used in many areas of physics and optical technologies ranging from coupling light into nanophotonic components to optical sensing and amplification to interfacing quantum emitters. Here, we study the fundamental tor
Externí odkaz:
http://arxiv.org/abs/2301.07792
Autor:
Pucher, Dunja, Rendl, Franz
We consider semidefinite relaxations of Stable-Set and Coloring, which are based on quadratic 0-1 optimization. Information about the stability number and the chromatic number is hidden in the objective function. This leads to simplified relaxations
Externí odkaz:
http://arxiv.org/abs/2211.13147
Autor:
Liedl, Christian, Tebbenjohanns, Felix, Bach, Constanze, Pucher, Sebastian, Rauschenbeutel, Arno, Schneeweiss, Philipp
Dicke superradiance describes the collective radiative decay of a fully inverted ensemble of two-level atoms. We experimentally investigate this effect for a chiral, i.e.,~direction-dependent light--matter coupling. Despite a fundamentally different
Externí odkaz:
http://arxiv.org/abs/2211.08940
Autor:
Liedl, Christian, Pucher, Sebastian, Schneeweiss, Philipp, Yatsenko, Leonid P., Rauschenbeutel, Arno
Quantum emitters with a $\Lambda$-type level structure enable numerous protocols and applications in quantum science and technology. Understanding and controlling their dynamics is, therefore, one of the central research topics in quantum optics. Her
Externí odkaz:
http://arxiv.org/abs/2207.00437