Showing 2019 · quant-phShow all

29 papers · 2 filters

quant-ph2019★ 30 cited

Sideband-resolved resonator electromechanics on the single-photon level based on a nonlinear Josephson inductance

Philip Schmidt, Mohammad T. Amawi, Stefan Pogorzalek +4

Light-matter interaction in optomechanical systems is the foundation for ultra-sensitive detection schemes [1,2] as well as the generation of phononic and photonic quantum states […

quant-ph2019★ 18 cited

General Mixed State Quantum Data Compression with and without Entanglement Assistance

Zahra Baghali Khanian, Andreas Winter

We consider the most general (finite-dimensional) quantum mechanical information source, which is given by a quantum system that is correlated with a reference system . The…

quant-ph2019★ 23 cited

Convergence rates for the quantum central limit theorem

Simon Becker, Nilanjana Datta, Ludovico Lami +1

Various quantum analogues of the central limit theorem, which is one of the cornerstones of probability theory, are known in the literature. One such analogue, due to Cushen and Hu…

quant-ph2019★ 17 cited

Stability of logarithmic Sobolev inequalities under a noncommutative change of measure

Marius Junge, Nicholas LaRacuente, Cambyse Rouzé

We generalize Holley-Stroock's perturbation argument from commutative to quantum Markov semigroups. As a consequence, results on (complete) modified logarithmic Sobolev inequalitie…

quant-ph2019★ 50 cited

Speed-ups to isothermality: Enhanced quantum thermal machines through control of the system-bath coupling

Nicola Pancotti, Matteo Scandi, Mark T. Mitchison +1

Isothermal transformations are minimally dissipative but slow processes, as the system needs to remain close to thermal equilibrium along the protocol. Here, we show that smoothly…

quant-ph2019★ 7 cited

Universal superposition codes: capacity regions of compound quantum broadcast channel with confidential messages

Holger Boche, Gisbert Janßen, Sajad Saeedinaeeni

We derive universal codes for transmission of broadcast and confidential messages over classical-quantum-quantum and fully quantum channels. These codes are robust to channel uncer…

quant-ph2019★ 296 cited

Obstacles to State Preparation and Variational Optimization from Symmetry Protection

Sergey Bravyi, Alexander Kliesch, Robert Koenig +1

Local Hamiltonians with topological quantum order exhibit highly entangled ground states that cannot be prepared by shallow quantum circuits. Here, we show that this property may e…

quant-ph2019★ 51 cited

Nonlinear quantum dot optomechanics

Matthias Weiß, Daniel Wigger, Maximilian Nägele +5

Wave mixing is an archetypical phenomenon in bosonic systems. In optomechanics, the bi-directional conversion between electromagnetic waves or photons at optical frequencies and el…

quant-ph2019★ 24 cited

On the modified logarithmic Sobolev inequality for the heat-bath dynamics for 1D systems

Ivan Bardet, Angela Capel, Angelo Lucia +2

The mixing time of Markovian dissipative evolutions of open quantum many-body systems can be bounded using optimal constants of certain quantum functional inequalities, such as the…

quant-ph2019★ 39 cited

Dissipative correlated dynamics of a moving impurity immersed in a Bose-Einstein Condensate

S. I. Mistakidis, F. Grusdt, G. M. Koutentakis +1

We unravel the nonequilibrium correlated quantum quench dynamics of an impurity traveling through a harmonically confined Bose-Einstein condensate in one-dimension. For weak repuls…

quant-ph2019★ 94 cited

Many-body topological invariants from randomized measurements

Andreas Elben, Jinlong Yu, Guanyu Zhu +4

The classification of symmetry-protected topological (SPT) phases in one dimension has been recently achieved, and had a fundamental impact in our understanding of quantum phases i…

quant-ph2019★ 278 cited

Simulating quantum many-body dynamics on a current digital quantum computer

Adam Smith, M. S. Kim, Frank Pollmann +1

Universal quantum computers are potentially an ideal setting for simulating many-body quantum dynamics that is out of reach for classical digital computers. We use state-of-the-art…

quant-ph2019★ 144 cited

Quantum advantage with noisy shallow circuits in 3D

Sergey Bravyi, David Gosset, Robert Koenig +1

Prior work has shown that there exists a relation problem which can be solved with certainty by a constant-depth quantum circuit composed of geometrically local gates in two dimens…

quant-ph2019★ 121 cited

NetKet: A Machine Learning Toolkit for Many-Body Quantum Systems

Giuseppe Carleo, Kenny Choo, Damian Hofmann +15

We introduce NetKet, a comprehensive open source framework for the study of many-body quantum systems using machine learning techniques. The framework is built around a general and…

quant-ph2019★ 14 cited

Shaping of the time-evolution of field-free molecular orientation by THz laser pulses

R. Tehini, K. Hamraoui, D. Sugny

We present a theoretical study of the shaping of the time-evolution of field-free orientation of linear molecules. We show the extend to which the degree of orientation can be stee…

quant-ph2019

VIP2 in LNGS - Testing the Pauli Exclusion Principle for electrons with high sensitivity

J. Marton, A. Pichler, A. Amirkhani +25

The VIP2 (VIolation of the Pauli Exclusion Principle) experiment at the Gran Sasso underground laboratory (LNGS) is searching for possible violations of standard quantum mechanics…

quant-ph2019★ 2 cited

The Simultaneous Identification Capacity of the Classical--Quantum Multiple Access Channel with Stochastic Encoders for Transmission

Stephen Diadamo, Holger Boche

In [1], it is shown that the simultaneous identification capacity region for the discrete, memoryless, classical-quantum multiple access channel is equal to the transmission capaci…

quant-ph2019★ 18 cited

Typical entanglement for Gaussian states

Motohisa Fukuda, Robert Koenig

We consider ensembles of bipartite states resulting from a random passive Gaussian unitary applied to a fiducial pure Gaussian state. We show that the symplectic spectra of the red…

quant-ph2019★ 20 cited

RTNI - A symbolic integrator for Haar-random tensor networks

Motohisa Fukuda, Robert Koenig, Ion Nechita

We provide a computer algebra package called Random Tensor Network Integrator (RTNI). It allows to compute averages of tensor networks containing multiple Haar-distributed random u…

quant-ph2019★ 4 cited

Quantum Learning Boolean Linear Functions w.r.t. Product Distributions

Matthias C. Caro

The problem of learning Boolean linear functions from quantum examples w.r.t. the uniform distribution can be solved on a quantum computer using the Bernstein-Vazirani algorithm. A…

quant-ph2019★ 16 cited

Eventually entanglement breaking Markovian dynamics: structure and characteristic times

Eric P. Hanson, Cambyse Rouzé, Daniel Stilck França

We investigate entanglement breaking times of Markovian evolutions in discrete and continuous time. In continuous time, we characterize which Markovian evolutions are eventually en…

quant-ph2019

Construction and universal application of entanglement erasing partner states

Daniel Hetterich, Polina Matveeva

We investigate the subadditivity of the bipartite entanglement entropy (EE) of many-particle states, represented by Slater determinants, with respect to single particle excitations…

quant-ph2019★ 7 cited

Reachability in Infinite Dimensional Unital Open Quantum Systems with Switchable GKS-Lindblad Generators

Frederik vom Ende, Gunther Dirr, Michael Keyl +1

In quantum systems theory one of the fundamental problems boils down to: given an initial state, which final states can be reached by the dynamic system in question. Here we consid…

quant-ph2019★ 8 cited

Quantum Error-Detection at Low Energies

Martina Gschwendtner, Robert Koenig, Burak Şahinoğlu +1

Motivated by the close relationship between quantum error-correction, topological order, the holographic AdS/CFT duality, and tensor networks, we initiate the study of approximate…