30 citations · 42 across the 5 of their papers we have counts for
5 papers
Sound waves in a backreaction-affected analogue spacetime: acoustic metric, mass, and correlations in Bose-Einstein condensates
Sang-Shin Baak, Hyun-Yong Lee
Analogue gravity describes sound as a field propagating on an effective spacetime set by the background flow, which is usually treated as given; in reality, however, quantum fluctu…
Quantum backreaction effect in optical solitons
Sang-Shin Baak, Friedrich Koenig
Optical solitons classically are stationary solutions of the nonlinear Schrödinger equation. We perform a quantum field theoretic treatment by quantising a linearised fluctuation f…
Petrov classification of analogue spacetimes
Sang-Shin Baak, Satadal Datta, Uwe R. Fischer
In an effort to invariantly characterize the conformal curvature structure of analogue spacetimes built from a nonrelativistic fluid background, we determine the Petrov type of a v…
Number-conserving solution for dynamical quantum backreaction in a Bose-Einstein condensate
Sang-Shin Baak, Caio C. Holanda Ribeiro, Uwe R. Fischer
We provide a number-conserving approach to the backreaction problem of small quantum fluctuations onto a classical background for the exactly soluble dynamical evolution of a Bose-…
On the existence of steady-state black hole analogues in finite quasi-one-dimensional Bose-Einstein condensates
Caio C. Holanda Ribeiro, Sang-Shin Baak, Uwe R. Fischer
We theoretically propose a finite-size quasi-one-dimensional Bose-Einstein condensate with coherent source and drain placed at its two ends, which can in principle sustain a statio…