46 citations · 59 across the 12 of their papers we have counts for
12 papers
The Geometry of Transport in Quantum Walks and Parrondo's Paradox
Jose Alfredo de Leon, Mariana Pérez-Muralles, Jan Neuser +1
We study Parrondo's paradox -- the phenomenon where combining losing strategies yields a winning one -- in a minimal discrete-time quantum walk. We introduce the transport vector,…
Quantum vs Classical Erasure: Equal Bounds but Unequal Costs
Jan Neuser, Jake Xuereb, Pharnam Bakhshinezhad +1
Irreversibility has a fundamental thermodynamic cost, erasing information inevitably generates heat. This connection is quantified by the Landauer bound, which gives the minimum di…
Quantum Field Theory of Black Hole Perturbations with Backreaction VI. Apparent Horizons, Quasi-Local Mass and Effective Classical Metrics
Jonas Neuser, Thomas Thiemann
In a recent series of papers we developed a first-principle and gauge invariant approach to black hole perturbation theory valid to any order. We included back reaction effects to…
Prodiabatic Elimination: Higher Order Elimination of Fast Variables with Quantum Noise
Jan Neuser, Marcelo Janovitch, Matteo Brunelli +1
We introduce the prodiabatic elimination, a powerful approximation technique that systematically extends the adiabatic elimination of fast degrees of freedom in light-matter couple…
Quantum Field Theory of Black Hole Perturbations with Backreaction V. Beyond Second Order Perturbations
Jonas Neuser, Thomas Thiemann
Black hole perturbation theory beyond second order is not well understood because typically one defines the meaning of gauge invariance order by order which is ambiguous. In this s…
Quantum Field Theory of Black Hole Perturbations with Backreaction IV. Spherically symmetric 2nd order Einstein-Maxwell sector in generalised gauges
Jonas Neuser
In previous papers of this series we analysed the reduced phase space approach to perturbations of Einstein-Maxwell theory to second order around spherically symmetric backgrounds…
Quantum Field Theory of Black Hole Perturbations with Backreaction III. Spherically symmetric 2nd order Maxwell sector
Jonas Neuser, Thomas Thiemann
In this paper we extend reduced phase space approach to black hole perturbation theory to Maxwell matter. We expand the resulting reduced Hamiltonian to second order in the gravito…
Quantum Field Theory of Black Hole Perturbations with Backreaction II. Spherically symmetric 2nd order Einstein sector
Jonas Neuser, Thomas Thiemann
In this second paper of our series we focus on the classical pure gravity sector of spherically symmetric black hole perturbations and expand the reduced Hamiltonian to second orde…
Smooth, invariant orthonormal basis for singular potential Schroedinger operators
J. Neuser, T. Thiemann
In a recent contribution we showed that there exists a smooth, dense domain for singular potential Schrödinger operators on the real line which is invariant under taking derivative…
Duality Defects in
I. M. Burbano, Justin Kulp, Jonas Neuser
We classify all non-invertible Kramers-Wannier duality defects in the lattice Vertex Operator Algebra (i.e. the chiral WZW model) coming from symmetr…
A Wavefunction Description for a Localized Quantum Particle in Curved Spacetimes
T. Rick Perche, Jonas Neuser
We reduce Dirac's spinor formalism for a spin 1/2 particle to a complex wavefunction description in curved spacetimes. We consider a localized fermionic particle in curved spacetim…
Quantum Cosmological Backreactions II: Purely Homogeneous Quantum Cosmology
J. Neuser, S. Schander, T. Thiemann
This is the second paper in a series of four in which we use space adiabatic methods in order to incorporate backreactions among the homogeneous and between the homogeneous and inh…