87 citations · 185 across the 11 of their papers we have counts for
11 papers
Genuine many-body quantum scars along unstable modes in Bose-Hubbard systems
Quirin Hummel, Klaus Richter, Peter Schlagheck
The notion of many-body quantum scars is associated with special eigenstates, usually concentrated in certain parts of Hilbert space, that give rise to robust persistent oscillatio…
Symmetry-induced many-body quantum interference in chaotic bosonic systems: an augmented Truncated Wigner method
Quirin Hummel, Peter Schlagheck
Although highly successful, the Truncated Wigner Approximation (TWA) does not account for genuine many-body quantum interference between different solutions of the mean-field equat…
Partial Fermionization---Spectral Universality in 1D Repulsive Bose Gases
Quirin Hummel, Juan Diego Urbina, Klaus Richter
Due to the vast growth of the many-body level density with excitation energy, its smoothed form is of central relevance for spectral and thermodynamic properties of interacting qua…
Reversible quantum information spreading in many-body systems near criticality
Quirin Hummel, Benjamin Geiger, Juan Diego Urbina +1
Quantum chaotic interacting -particle systems are assumed to show fast and irreversible spreading of quantum information on short (Ehrenfest) time scales . Here we…
Nonlocal pair correlations in Lieb-Liniger gases: A unified nonperturbative approach from weak degeneracy to high temperatures
Benjamin Geiger, Quirin Hummel, Juan Diego Urbina +1
We present analytical results for the nonlocal pair correlations in one-dimensional bosonic systems with repulsive contact interactions that are uniformly valid from the classical…
Semiclassics in a system without classical limit: The few-body spectrum of two interacting bosons in one dimension
Benjamin Geiger, Juan-Diego Urbina, Quirin Hummel +1
We present a semiclassical study of the spectrum of a few-body system consisting of two short-range interacting bosonic particles in one dimension, a particular case of a general c…
Canonical description of 1D few-body systems with short range interaction
Quirin Hummel, Juan Diego Urbina, Klaus Richter
We address the fundamental interplay between indistinguishability and interactions when discreteness effects are neglected in systems with strictly fixed number of particles. For t…
Boson Sampling as Canonical Transformation: A semiclassical approach in Fock space
Thomas Engl, Juan Diego Urbina, Quirin Hummel +1
We show that a theory of complex scattering between many-body (Fock) states can be constructed such that its classical limit is a canonical transformation thus encoding quantum int…
Multiparticle correlations in mesoscopic scattering: boson sampling, birthday paradox, and Hong-Ou-Mandel profiles
Juan-Diego Urbina, Jack Kuipers, Quirin Hummel +2
The interplay between single-particle interference and quantum indistinguishability leads to signature correlations in many-body scattering. We uncover these with a semiclassical c…
Quantum graphs whose spectra mimic the zeros of the Riemann zeta function
Jack Kuipers, Quirin Hummel, Klaus Richter
One of the most famous problems in mathematics is the Riemann hypothesis: that the non-trivial zeros of the Riemann zeta function lie on a line in the complex plane. One way to pro…
A geometrical approach to the mean density of states in many-body quantum systems
Quirin Hummel, Juan Diego Urbina, Klaus Richter
We present a novel analytical approach for the calculation of the mean density of states in many-body systems made of confined indistinguishable and non-interacting particles. Our…