Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,854 papers in 12 months (-35% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
How deep learning works -The geometry of deep learning
Xiao Dong, Jiasong Wu, Ling Zhou·Oct 30, 2017
Why and how that deep learning works well on different tasks remains a mystery from a theoretical perspective. In this paper we draw a geometric picture of the deep learning system by finding its analogies with two existing geometric structures, the ...
Super-exponential query complexity reduction via noise-resistant quantum search
Daniel Z. Zanger·Oct 30, 2017
In the SEARCH WITH ADVICE problem, a single entry of interest within a database of N entries is to be found assuming that an ordering of the entries, from that with the highest probability of being the entry of interest (as determined by a so-called ...
Cosmological constant as quantum error correction from generalised gauge invariance in double field theory
A. Patrascu·Oct 29, 2017
The holographic principle and its realisation as the AdS/CFT correspondence leads to the existence of the so called precursor operators. These are boundary operators that carry non-local information regarding events occurring deep inside the bulk and...
Operating Quantum States in Single Magnetic Molecules: Implementation of Grover's Quantum Algorithm.
C. Godfrin, Abdelkarim Ferhat, R. Ballou +4 more·Oct 27, 2017
Quantum algorithms use the principles of quantum mechanics, such as, for example, quantum superposition, in order to solve particular problems outperforming standard computation. They are developed for cryptography, searching, optimization, simulatio...
Quantum versus Classical Online Algorithms with Advice and Logarithmic Space
K. Khadiev, A. Khadieva, Dmitry Kravchenko +1 more·Oct 26, 2017
In this paper, we consider online algorithms. Typically the model is investigated with respect to competitive ratio. We consider algorithms with restricted memory (space) and explore their power. We focus on quantum and classical online algorithms. W...
Qubit models of weak continuous measurements: markovian conditional and open-system dynamics
J. Gross, C. Caves, G. Milburn +1 more·Oct 26, 2017
In this paper we approach the theory of continuous measurements and the associated unconditional and conditional (stochastic) master equations from the perspective of quantum information and quantum computing. We do so by showing how the continuous-t...
Operator Spreading and the Emergence of Dissipative Hydrodynamics under Unitary Evolution with Conservation Laws
V. Khemani, A. Vishwanath, D. Huse·Oct 26, 2017
We study the scrambling of local quantum information in chaotic many-body systems in the presence of a locally conserved quantity like charge or energy that moves diffusively. The interplay between conservation laws and scrambling sheds light on the ...
Scalable Neural Network Decoders for Higher Dimensional Quantum Codes
N. P. Breuckmann, Xiaotong Ni·Oct 25, 2017
Machine learning has the potential to become an important tool in quantum error correction as it allows the decoder to adapt to the error distribution of a quantum chip. An additional motivation for using neural networks is the fact that they can be ...
Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
R. Ikuta, Toshiki Kobayashi, Tetsuo Kawakami +8 more·Oct 25, 2017
Long-lifetime quantum storages accessible to the telecom photonic infrastructure are essential to long-distance quantum communication. Atomic quantum storages have achieved subsecond storage time corresponding to 1000 km transmission time for a telec...
Recursive Path-Summing Simulation of Quantum Computation
Andrew Shi·Oct 25, 2017
Classical simulation of quantum computation has often been viewed as the method to determine where the horizon of quantum supremacy is located---that is, where quantum computation can no longer be simulated by classical methods. As of now, the 50 qub...
Heralded creation of photonic qudits from parametric down conversion using linear optics
J. Yoshikawa, M. Bergmann, P. Loock +7 more·Oct 24, 2017
We propose an experimental scheme to generate, in a heralded fashion, arbitrary quantum superpositions of two-mode optical states with a fixed total photon number $n$ based on weakly squeezed two-mode squeezed state resources (obtained via weak param...
Learning Hidden Quantum Markov Models
Siddarth Srinivasan, Geoffrey J. Gordon, Byron Boots·Oct 24, 2017
Hidden Quantum Markov Models (HQMMs) can be thought of as quantum probabilistic graphical models that can model sequential data. We extend previous work on HQMMs with three contributions: (1) we show how classical hidden Markov models (HMMs) can be s...
Quantum criticality and state engineering in the simulated anisotropic quantum Rabi model
Yimin Wang, W. You, Maoxin Liu +4 more·Oct 24, 2017
Promising applications of the anisotropic quantum Rabi model (AQRM) in broad parameter ranges are explored, which is realized with superconducting flux qubits simultaneously driven by two-tone time-dependent magnetic fields. Regarding the quantum pha...
Learning with Errors and Extrapolated Dihedral Cosets
Zvika Brakerski, Elena Kirshanova, D. Stehlé +1 more·Oct 23, 2017
The hardness of the learning with errors (LWE) problem is one of the most fruitful resources of modern cryptography. In particular, it is one of the most prominent candidates for secure post-quantum cryptography. Understanding its quantum complexity ...
Scalable effective temperature reduction for quantum annealers via nested quantum annealing correction
W. Vinci, Daniel A. Lidar·Oct 22, 2017
Nested quantum annealing correction (NQAC) is an error correcting scheme for quantum annealing that allows for the encoding of a logical qubit into an arbitrarily large number of physical qubits. The encoding replaces each logical qubit by a complete...
OpenFermion: the electronic structure package for quantum computers
J. McClean, N. Rubin, Kevin J Sung +38 more·Oct 20, 2017
Quantum simulation of chemistry and materials is predicted to be an important application for both near-term and fault-tolerant quantum devices. However, at present, developing and studying algorithms for these problems can be difficult due to the pr...
Quantum machine learning for quantum anomaly detection
Nana Liu, P. Rebentrost·Oct 20, 2017
Anomaly detection is used for identifying data that deviate from `normal' data patterns. Its usage on classical data finds diverse applications in many important areas like fraud detection, medical diagnoses, data cleaning and surveillance. With the ...
Automated optimization of large quantum circuits with continuous parameters
Y. Nam, N. J. Ross, Yuan Su +2 more·Oct 19, 2017
We develop and implement automated methods for optimizing quantum circuits of the size and type expected in quantum computations that outperform classical computers. We show how to handle continuous gate parameters and report a collection of fast alg...
Waiting time in quantum repeaters with probabilistic entanglement swapping
E. Shchukin, Frank Schmidt, P. Loock·Oct 17, 2017
The standard approach to realize a quantum repeater relies upon probabilistic but heralded entangled state manipulations and the storage of quantum states while waiting for successful events. In the literature on this class of repeaters, calculating ...
Heralded entangling quantum gate via cavity-assisted photon scattering
H. Borges, D. Z. Rossatto, F. S. Luiz +1 more·Oct 17, 2017
We theoretically investigate the generation of heralded entanglement between two identical atoms via cavity-assisted photon scattering in two different configurations, namely either both atoms confined in the same cavity or trapped into locally separ...