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7 papers · 2 filters
Scattering in the PT-symmetric Coulomb potential
Geza Levai, Petr Siegl, Miloslav Znojil
Scattering on the -symmetric Coulomb potential is studied along a U-shaped trajectory circumventing the origin in the complex plane from below. This trajectory refle…
Scattering theory of cooling and heating in opto-mechanical systems
André Xuereb, Peter Domokos, János Asbóth +2
We present a one-dimensional scattering theory which enables us to describe a wealth of effects arising from the coupling of the motional degree of freedom of scatterers to the ele…
Asymptotically vanishing PT-symmetric potentials and negative-mass Schroedinger equations
Miloslav Znojil, Petr Siegl, Géza Lévai
In paper I [M. Znojil and G. Lévai, Phys. Lett. A 271 (2000) 327] we introduced the Coulomb - Kratzer bound-state problem in its cryptohermitian, PT-symmetric version. An instabili…
Practical methods for witnessing genuine multi-qubit entanglement in the vicinity of symmetric states
Geza Toth, Witlef Wieczorek, Roland Krischek +3
We present general numerical methods to construct witness operators for entanglement detection and estimation of the fidelity. Our methods are applied to detecting entanglement in…
Experimental entanglement of a six-photon symmetric Dicke state
Witlef Wieczorek, Roland Krischek, Nikolai Kiesel +3
We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0.6540.024 and prove genuine six-photon e…
Does wave function collapse cause gravity?
Lajos Diósi
We give a twist to the assumption - discussed in various earlier works - that gravity plays a role in the collapse of the wave function. This time we discuss the contrary assumptio…