Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,745 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Two-dimensional nanoscale nuclear magnetic resonance spectroscopy enhanced by artificial intelligence
Zhiping Yang, X. Kong, Zhijie Li +10 more·Feb 15, 2019
Two-dimensional Nuclear Magnetic Resonance (NMR) is essential to molecule structure determination. Nitrogen vacancy (NV) center in diamond has been proposed and developed as an outstanding quantum sensor to realize NMR in nanoscale. However, it is st...
A quantum compiler for qudits of prime dimension greater than 3.
Luke E Heyfron, E. Campbell·Feb 14, 2019
Prevailing proposals for the first generation of quantum computers make use of 2-level systems, or qubits, as the fundamental unit of quantum information. However, recent innovations in quantum error correction and magic state distillation protocols ...
Smart contracts meet quantum cryptography
Andrea Coladangelo·Feb 14, 2019
We put forward the idea that classical blockchains and smart contracts are potentially useful primitives not only for classical cryptography, but for quantum cryptography as well. Abstractly, a smart contract is a functionality that allows parties to...
Three-qubit exact Grover within the blind oracular quantum computation scheme
Cica Gustiani, D. DiVincenzo·Feb 14, 2019
Here we extend the concept of blind client-server quantum computation, in which a client with limited quantum power controls the execution of a quantum computation on a powerful server, without revealing any details of the computation. Our extension ...
Multi-matrix error estimation and reconciliation for quantum key distribution.
Chaohui Gao, Dong Jiang, Yu Guo +1 more·Feb 14, 2019
Post-processing is a significant step in quantum key distribution (QKD), which is used for correcting the quantum-channel noise errors and distilling identical corrected keys between two distant legitimate parties. Efficient error reconciliation prot...
Quantum Simulation of Resonant Transitions for Solving the Eigenproblem of an Effective Water Hamiltonian.
Zhaokai Li, Xiaomei Liu, Hefeng Wang +5 more·Feb 14, 2019
It is difficult to calculate the energy levels and eigenstates of a large physical system on a classical computer because of the exponentially growing size of the Hilbert space. In this work, we experimentally demonstrate a quantum algorithm which co...
Optimal measurement strategies for fast entanglement detection
N. Milazzo, D. Braun, O. Giraud·Feb 13, 2019
With the advance of quantum information technology, the question of how to most efficiently test quantum circuits is becoming of increasing relevance. Here we introduce the statistics of lengths of measurement sequences that allows one to certify ent...
Detecting itinerant microwave photons with engineered non-linear dissipation
R. Lescanne, S. Del'eglise, E. Albertinale +6 more·Feb 13, 2019
Single photon detection is a key resource for sensing at the quantum limit and the enabling technology for measurement based quantum computing. Photon detection at optical frequencies relies on irreversible photo-assisted ionization of various natura...
On the physical limit of quantum computing.
Y. Ozhigov·Feb 13, 2019
Experimental attempts to implement quantum speedup of computations over the past 30 years have yielded a negative result, despite the absence of physical laws prohibiting such speedup. The article formulates the limitation of quantum formalism in the...
Quantum Language Processing
N. Wiebe, Alex Bocharov, P. Smolensky +2 more·Feb 13, 2019
We present a representation for linguistic structure that we call a Fock-space representation, which allows us to embed problems in language processing into small quantum devices. We further develop a formalism for understanding both classical as wel...
Graver Bases via Quantum Annealing with Application to Non-Linear Integer Programs
H. Alghassi, Raouf Dridi, S. Tayur·Feb 12, 2019
We propose a novel hybrid quantum-classical approach to calculate Graver bases, which have the potential to solve a variety of hard linear and non-linear integer programs, as they form a test set (optimality certificate) with very appealing propertie...
High-Speed, Low-Crosstalk Detection of a Trapped $^{171}$Yb$^+$ Ion Ancilla Qubit using Superconducting Nanowire Single Photon Detectors
S. Crain, Clinton Cahall, Geert Vrijsen +5 more·Feb 11, 2019
Qubits used in quantum computing tend to suffer from errors, either from the qubit interacting with the environment, or from imperfect control when quantum logic gates are applied. Fault-tolerant construction based on quantum error correcting codes (...
Hardware-Efficient Qubit Control with Single-Flux-Quantum Pulse Sequences
Kangbo Li, Robert McDermott, M. Vavilov·Feb 8, 2019
Single-flux-quantum (SFQ) digital logic is an attractive candidate for classical control and monitoring of large-scale quantum processors based on superconducting qubits. The authors describe a control approach based on repeated irradiation of the qu...
Entanglement wedge reconstruction using the Petz map
Chi-Fang Chen, Geoffrey Penington, Grant Salton·Feb 7, 2019
At the heart of recent progress in AdS/CFT is the question of subregion duality, or entanglement wedge reconstruction: which part(s) of the boundary CFT are dual to a given subregion of the bulk? This question can be answered by appealing to the quan...
Nonlinear LC Circuit with Josephson Junction
A. Delgado·Feb 6, 2019
This paper illustrates a unified approach, classical circuit and control theories, to study a nonlinear LC circuit with a current dependent inductance as model of the Josephson junction, the mathematical analysis is complemented with simulations to v...
When does reinforcement learning stand out in quantum control? A comparative study on state preparation
Xiao-Ming Zhang, Zezhu Wei, Raza Asad +2 more·Feb 6, 2019
Reinforcement learning has been widely used in many problems, including quantum control of qubits. However, such problems can, at the same time, be solved by traditional, non-machine-learning methods, such as stochastic gradient descent and Krotov al...
Benchmarking the quantum cryptanalysis of symmetric, public-key and hash-based cryptographic schemes
Vlad Gheorghiu, M. Mosca·Feb 6, 2019
Quantum algorithms can break factoring and discrete logarithm based cryptography and weaken symmetric cryptography and hash functions. In order to estimate the real-world impact of these attacks, apart from tracking the development of fault-tolerant ...
Quantum error-detection at low energies
Martina Gschwendtner, Robert Koenig, Burak Şahinoğlu +1 more·Feb 6, 2019
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 quantum error-detecting codes in matrix product states (MPS). We first...
Qubitization of Arbitrary Basis Quantum Chemistry Leveraging Sparsity and Low Rank Factorization
D. Berry, C. Gidney, M. Motta +2 more·Feb 6, 2019
Recent work has dramatically reduced the gate complexity required to quantum simulate chemistry by using linear combinations of unitaries based methods to exploit structure in the plane wave basis Coulomb operator. Here, we show that one can achieve ...
Conversion of Gaussian states to non-Gaussian states using photon-number-resolving detectors
D. Su, C. Myers, K. Sabapathy·Feb 6, 2019
Generation of high fidelity photonic non-Gaussian states is a crucial ingredient for universal quantum computation using continous-variable platforms, yet it remains a challenge to do so efficiently. We present a general framework for a probabilistic...