Showing 2018 · quant-phShow all

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quant-ph2018★ 40 cited

Randomized benchmarking for individual quantum gates

E. Onorati, A. H. Werner, J. Eisert

Any technology requires precise benchmarking of its components, and the quantum technologies are no exception. Randomized benchmarking allows for the relatively resource economical…

quant-ph2018★ 31 cited

Optimal Control of Hybrid Optomechanical Systems for Generating Non-Classical States of Mechanical Motion

Ville Bergholm, Witlef Wieczorek, Thomas Schulte-Herbrueggen +1

Cavity optomechanical systems are one of the leading experimental platforms for controlling mechanical motion in the quantum regime. We exemplify that the control over cavity optom…

quant-ph2018★ 46 cited

Sample complexity of device-independently certified "quantum supremacy"

Dominik Hangleiter, Martin Kliesch, Jens Eisert +1

Results on the hardness of approximate sampling are seen as important stepping stones towards a convincing demonstration of the superior computational power of quantum devices. The…

quant-ph2018★ 16 cited

Optimal realistic attacks in continuous-variable quantum key distribution

Nedasadat Hosseinidehaj, Nathan Walk, Timothy C. Ralph

Quantum cryptographic protocols are typically analysed by assuming that potential opponents can carry out all physical operations, an assumption which grants capabilities far in ex…

quant-ph2018★ 233 cited

PennyLane: Automatic differentiation of hybrid quantum-classical computations

Ville Bergholm, Josh Izaac, Maria Schuld +65

PennyLane is a Python 3 software framework for differentiable programming of quantum computers. The library provides a unified architecture for near-term quantum computing devices,…

quant-ph2018★ 71 cited

Reinforcement Learning Decoders for Fault-Tolerant Quantum Computation

Ryan Sweke, Markus S. Kesselring, Evert P. L. van Nieuwenburg +1

Topological error correcting codes, and particularly the surface code, currently provide the most feasible roadmap towards large-scale fault-tolerant quantum computation. As such,…

quant-ph2018★ 87 cited

A tensor network annealing algorithm for two-dimensional thermal states

A. Kshetrimayum, M. Rizzi, J. Eisert +1

Tensor network methods have become a powerful class of tools to capture strongly correlated matter, but methods to capture the experimentally ubiquitous family of models at finite…

quant-ph2018★ 54 cited

Contracting projected entangled pair states is average-case hard

Jonas Haferkamp, Dominik Hangleiter, Jens Eisert +1

An accurate calculation of the properties of quantum many-body systems is one of the most important yet intricate challenges of modern physics and computer science. In recent years…

quant-ph2018★ 6 cited

Single-shot holographic compression from the area law

Henrik Wilming, Jens Eisert

The area law conjecture states that the entanglement entropy of a region of space in the ground state of a gapped, local Hamiltonian only grows like the surface area of the region.…

quant-ph2018★ 41 cited

Equilibration towards generalized Gibbs ensembles in non-interacting theories

Marek Gluza, Jens Eisert, Terry Farrelly

Even after almost a century, the foundations of quantum statistical mechanics are still not completely understood. In this work, we provide a precise account on these foundations f…

quant-ph2018★ 398 cited

A Game of Surface Codes: Large-Scale Quantum Computing with Lattice Surgery

Daniel Litinski

Given a quantum gate circuit, how does one execute it in a fault-tolerant architecture with as little overhead as possible? In this paper, we discuss strategies for surface-code qu…

quant-ph2018★ 8 cited

Identification of malfunctioning quantum devices

M. Skotiniotis, Santiago Llorens, R. Hotz +2

We consider the problem of correctly identifying a malfunctioning quantum device that forms part of a network of such devices, which can be considered as the quantum analogue o…

quant-ph2018★ 81 cited

Von Neumann entropy from unitarity

P. Boes, J. Eisert, R. Gallego +2

The von Neumann entropy is a key quantity in quantum information theory and, roughly speaking, quantifies the amount of quantum information contained in a state when many identical…

quant-ph2018★ 25 cited

Quantum read-out for cold atomic quantum simulators

M. Gluza, T. Schweigler, B. Rauer +3

Quantum simulators allow to explore static and dynamical properties of otherwise intractable quantum many-body systems. In many instances, however, it is the read-out that limits s…

quant-ph2018★ 9 cited

Dynamics of polar polarizable rotors acted upon by unipolar electromagnetic pulses: From the sudden to the adiabatic regime

Marjan Mirahmadi, Burkhard Schmidt, Mallikarjun Karra +1

We study, analytically as well as numerically, the dynamics that arises from the interaction of a polar polarizable rigid rotor with single unipolar electromagnetic pulses of varyi…

quant-ph2018★ 82 cited

Subsystem symmetries, quantum cellular automata, and computational phases of quantum matter

David T. Stephen, Hendrik Poulsen Nautrup, Juani Bermejo-Vega +2

Quantum phases of matter are resources for notions of quantum computation. In this work, we establish a new link between concepts of quantum information theory and condensed matter…

quant-ph2018★ 34 cited

The first law of general quantum resource theories

Carlo Sparaciari, Lidia del Rio, Carlo Maria Scandolo +2

We extend the tools of quantum resource theories to scenarios in which multiple quantities (or resources) are present, and their interplay governs the evolution of physical systems…

quant-ph2018★ 58 cited

The boundaries and twist defects of the color code and their applications to topological quantum computation

Markus S. Kesselring, Fernando Pastawski, Jens Eisert +1

The color code is both an interesting example of an exactly solved topologically ordered phase of matter and also among the most promising candidate models to realize fault-toleran…

quant-ph2018★ 13 cited

Resource theory of quantum thermodynamics: Thermal operations and Second Laws

Nelly Ng, Mischa P. Woods

Resource theories are a generic approach used to manage any valuable resource, such as entanglement, purity, and asymmetry. Such frameworks are characterized by two main elements:…

quant-ph2018★ 16 cited

Equilibration times in closed quantum many-body systems

H. Wilming, T. R. de Oliveira, A. J. Short +1

For a quantum system to be captured by a stationary statistical ensemble, as is common in thermodynamics and statistical mechanics, it is necessary that it reaches some apparently…

quant-ph2018★ 23 cited

Quantum work statistics and resource theories: bridging the gap through Renyi divergences

G. Guarnieri, N. H. Y. Ng, K. Modi +3

The work performed on or extracted from a non-autonomous quantum system described by means of a two-point projective-measurement approach takes the form of a stochastic variable. W…

quant-ph2018★ 28 cited

Phonon Quantum Nondemolition Measurements in Nonlinearly Coupled Optomechanical Cavities

B. D. Hauer, A. Metelmann, J. P. Davis

In the field of cavity optomechanics, proposals for quantum nondemolition (QND) measurements of phonon number provide a promising avenue by which one can study the quantum nature o…

quant-ph2018★ 108 cited

Quantum network routing and local complementation

F. Hahn, A. Pappa, J. Eisert

Quantum communication between distant parties is based on suitable instances of shared entanglement. For efficiency reasons, in an anticipated quantum network beyond point-to-point…

quant-ph2018★ 25 cited

Optimal Pure-State Qubit Tomography via Sequential Weak Measurements

Ezad Shojaee, Christopher S. Jackson, Carlos A. Riofrio +2

The spin-coherent-state positive-operator-valued-measure (POVM) is a fundamental measurement in quantum science, with applications including tomography, metrology, teleportation, b…