# All

## Chaos in Dirac electron optics: Emergence of a relativistic quantum chimera. (arXiv:1802.08197v1 [quant-ph])

We uncover a remarkable quantum scattering phenomenon in two-dimensional
Dirac material systems where the manifestations of both classically integrable
and chaotic dynamics emerge simultaneously and are electrically controllable.
The distinct relativistic quantum fingerprints associated with different
electron spin states are due to a physical mechanism analogous to chiroptical
effect in the presence of degeneracy breaking. The phenomenon mimics a chimera

## Entropic Dynamics: Mechanics without Mechanism. (arXiv:1704.02663v2 [quant-ph] UPDATED)

Entropic Dynamics is a framework in which dynamical laws such as those that
arise in physics are derived as an application of entropic methods of
inference. No underlying action principle is postulated. Instead, the dynamics
is driven by entropy subject to constraints reflecting the information that is
relevant to the problem at hand. In this work I review the derivation of
quantum theory but the fact that Entropic Dynamics is based on inference
methods that are of universal applicability suggests that it may be possible to

## Geometric effects result from square and circular confinements for a particle constrained to a space curve. (arXiv:1711.05453v2 [quant-ph] UPDATED)

Investigating the geometric effects resulting from the detailed behaviors of
the confining potential, we consider square and circular confinements to
constrain a particle to a space curve. We find a torsion-induced geometric
potential and a curvature-induced geometric momentum just in the square case,
while a geometric gauge potential solely in the circular case. In the presence
of electromagnetic field, a geometrically induced magnetic moment couples with

## Quantum walks assisted by particle number fluctuations. (arXiv:1802.07952v1 [quant-ph])

We study the spreading of a quantum particle placed in a single site of a
lattice or binary tree with the Hamiltonian permitting particle number changes.
We show that the particle number-changing interactions accelerate the spreading
beyond the ballistic expansion limit by inducing off-resonant Rabi oscillations
between states of different numbers of particles. We consider the effect of
perturbative number-changing couplings on Anderson localization in
one-dimensional disordered lattices and show that they lead to decrease of

## Computational complexity of PEPS zero testing. (arXiv:1802.08214v1 [quant-ph])

Projected entangled pair states aim at describing lattice systems in two
spatial dimensions that obey an area law. They are specified by associating a
tensor with each site, and they are generated by patching these tensors. We
consider the problem of determining whether the state resulting from this
patching is null, and prove it to be NP-hard; the PEPS used to prove this claim
have a boundary and are homogeneous in their bulk. A variation of this problem

## Efficient quantum pseudorandomness with simple graph states

Author(s): Rawad Mezher, Joe Ghalbouni, Joseph Dgheim, and Damian Markham
Measurement based (MB) quantum computation allows for universal quantum computing by measuring individual qubits prepared in entangled multipartite states, known as graph states. Unless corrected for, the randomness of the measurements leads to the generation of ensembles of random unitaries, where ...
[Phys. Rev. A 97, 022333] Published Fri Feb 23, 2018

## Local distinguishability of orthogonal quantum states with multiple copies of $2⊗2$ maximally entangled states

Author(s): Zhi-Chao Zhang, Yan-Qi Song, Ting-Ting Song, Fei Gao, Su-Juan Qin, and Qiao-Yan Wen
For general quantum systems, many sets of locally indistinguishable orthogonal quantum states have been constructed so far. However, it is interesting how much entanglement resources are sufficient and/or necessary to distinguish these states by local operations and classical communication (LOCC). H...
[Phys. Rev. A 97, 022334] Published Fri Feb 23, 2018

## Generalized Probabilistic Description of Noninteracting Identical Particles

Author(s): Marcin Karczewski, Marcin Markiewicz, Dagomir Kaszlikowski, and Paweł Kurzyński
We investigate an operational description of identical noninteracting particles in multiports. In particular, we look for physically motivated restrictions that explain their bunching probabilities. We focus on a symmetric 3-port in which a triple of superquantum particles admitted by our generalize...
[Phys. Rev. Lett. 120, 080401] Published Fri Feb 23, 2018

## Atypicality of Most Few-Body Observables

Author(s): Ryusuke Hamazaki and Masahito Ueda
The eigenstate thermalization hypothesis (ETH), which dictates that all diagonal matrix elements within a small energy shell be almost equal, is a major candidate to explain thermalization in isolated quantum systems. According to the typicality argument, the maximum variations of such matrix elemen...
[Phys. Rev. Lett. 120, 080603] Published Fri Feb 23, 2018

## Analytical modeling of parametrically modulated transmon qubits

Author(s): Nicolas Didier, Eyob A. Sete, Marcus P. da Silva, and Chad Rigetti
Building a scalable quantum computer requires developing appropriate models to understand and verify its complex quantum dynamics. We focus on superconducting quantum processors based on transmons for which full numerical simulations are already challenging at the level of qubytes. It is thus highly...
[Phys. Rev. A 97, 022330] Published Fri Feb 23, 2018