49 citations · 215 across the 15 of their papers we have counts for
15 papers
Temperatures are not useful to characterise bright-soliton experiments for ultra-cold atoms
Christoph Weiss, Simon A. Gardiner, Bettina Gertjerenken
Contrary to many other translationally invariant one-dimensional models, the low-temperature phase for an attractively interacting one-dimensional Bose-gas (a quantum bright solito…
Progress towards quantum-enhanced interferometry with harmonically trapped quantum matter-wave bright solitons
Bettina Gertjerenken, Timothy P. Wiles, Christoph Weiss
We model the dynamics of attractively interacting ultracold bosonic atoms in a quasi-one-dimensional wave-guide with additional harmonic trapping. Initially, we prepare the system…
Emergence and destruction of macroscopic wave functions
Bettina Gertjerenken, Martin Holthaus
The concept of the macroscopic wave function is a key for understanding macroscopic quantum phenomena. The existence of this object reflects a certain order, as is present in a Bos…
Effects of interactions on the generalized Hong-Ou-Mandel effect
B. Gertjerenken, P. G. Kevrekidis
We numerically investigate the influence of interactions on the generalized Hong-Ou-Mandel (HOM) effect for bosonic particles and show results for the cases of , and $N=…
Quasiparticle tunneling in a periodically driven bosonic Josephson junction
Bettina Gertjerenken, Martin Holthaus
A resonantly driven bosonic Josephson junction supports stable collective excitations, or quasiparticles, which constitute analogs of the Trojan wave packets previously explored wi…
Fluctuations of the order parameter of a mesoscopic Floquet condensate
Bettina Gertjerenken, Martin Holthaus
We suggest that nonequilibrium Bose-Einstein condensates may occur in time-periodically driven interacting Bose gases. Employing the model of a periodically forced bosonic Josephso…
Trojan quasiparticles
Bettina Gertjerenken, Martin Holthaus
We argue that a time-periodically driven bosonic Josephson junction supports stable, quasi-particle-like collective response modes which are -particle analogs of the nonspreadin…
Entangling two distinguishable quantum bright solitons via collisions
Thomas P. Billam, Caroline L. Blackley, Bettina Gertjerenken +2
The generation of mesoscopic Bell states via collisions of distinguishable bright solitons has been suggested in Phys. Rev. Lett. 111, 100406 (2013). Here, we extend our former pro…
Bright soliton quantum superpositions: signatures of high- and low-fidelity states
Bettina Gertjerenken
Scattering quantum bright solitons off barriers has been predicted to lead to nonlocal quantum superpositions, in particular the NOON-state. The focus of this paper lies on signatu…
Beyond mean-field behavior of large Bose-Einstein condensates in double-well potentials
Bettina Gertjerenken, Christoph Weiss
For the dynamics of Bose-Einstein condensates (BECs), differences between mean-field (Gross-Pitaevskii) physics and -particle quantum physics often disappear if the BEC becomes…
Generating mesoscopic Bell states via collisions of distinguishable quantum bright solitons
Bettina Gertjerenken, Thomas P. Billam, Caroline L. Blackley +4
We investigate numerically the collisions of two distinguishable quantum matter-wave bright solitons in a one-dimensional harmonic trap. We show that such collisions can be used to…
Scattering bright solitons: quantum versus mean-field behavior
Bettina Gertjerenken, Thomas P. Billam, Lev Khaykovich +1
We investigate scattering bright solitons off a potential using both analytical and numerical methods. Our paper focuses on low kinetic energies for which differences between the m…
Nonlocal quantum superpositions of bright matter-wave solitons and dimers
Bettina Gertjerenken, Christoph Weiss
The scattering of bright quantum solitons at barrier potentials in one-dimensional geometries is investigated. Such protocols have been predicted to lead to the creation of nonloca…
Spatial two-particle NOON-states in periodically shaken three-well potentials
Kirsten Stiebler, Bettina Gertjerenken, Niklas Teichmann +1
Few-particle dynamics in a three-well potential are investigated numerically. It is shown that periodically shaking the potential can considerably increase the fidelity of emerging…
Reproducible mesoscopic superpositions of Bose-Einstein condensates and mean-field chaos
Bettina Gertjerenken, Stephan Arlinghaus, Niklas Teichmann +1
In a parameter regime for which the mean-field (Gross-Pitaevskii) dynamics becomes chaotic, mesoscopic quantum superpositions in phase space can occur in a double-well potential wh…