Papers
Live trends in quantum computing research, updated daily from arXiv.
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28,402
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13,509 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient Qubit Measurement with a Nonreciprocal Microwave Amplifier.
F. Lecocq, L. Ranzani, G. Peterson +5 more·Sep 18, 2020
The act of observing a quantum object fundamentally perturbs its state, resulting in a random walk toward an eigenstate of the measurement operator. Ideally, the measurement is responsible for all dephasing of the quantum state. In practice, imperfec...
Equivalence of Three Classical Algorithms With Quantum Side Information: Privacy Amplification, Error Correction, and Data Compression
T. Tsurumaru·Sep 18, 2020
Privacy amplification (PA) is an indispensable component in classical and quantum cryptography. Error correction (EC) and data compression (DC) algorithms are also indispensable in classical and quantum information theory. We here study these three a...
Weakly measured while loops: peeking at quantum states
Pablo Andrés-Martínez, C. Heunen·Sep 18, 2020
A while loop tests a termination condition on every iteration. On a quantum computer, such measurements perturb the evolution of the algorithm. We define a while loop primitive using weak measurements, offering a trade-off between the perturbation ca...
Quantum search with prior knowledge
Xiaoyu He, Jialin Zhang, Xiaoming Sun·Sep 18, 2020
The combination of contextual side information and search is a powerful paradigm in the scope of artificial intelligence. The prior knowledge enables the identification of possible solutions but may be imperfect. Contextual information can arise natu...
Coordinated inference, holographic neural networks, and quantum error correction
A. Patrascu·Sep 17, 2020
Coordinated inference problems are being introduced as a basis for a neural network representation of the locality problem in the holographic bulk. It is argued that a type of problem originating in the ‘prisoners and hats’ dilemma involves non-local...
Error-protected qubits in a silicon photonic chip
C. Vigliar, S. Paesani, Yunhong Ding +8 more·Sep 17, 2020
General-purpose quantum computers can, in principle, entangle a number of noisy physical qubits to realize composite qubits protected against errors. Architectures for measurement-based quantum computing intrinsically support error-protected qubits a...
Fast and robust quantum state tomography from few basis measurements
F. Brandão, R. Kueng, Daniel Stilck França·Sep 17, 2020
Quantum state tomography is a powerful, but resource-intensive, general solution for numerous quantum information processing tasks. This motivates the design of robust tomography procedures that use relevant resources as sparingly as possible. Import...
Benchmarking quantum state transfer on quantum devices
Yi-Te Huang, Jhen-Dong Lin, Huan-Yu Ku +1 more·Sep 16, 2020
Quantum state transfer (QST) provides a method to send arbitrary quantum states from one system to another. Such a concept is crucial for transmitting quantum information into the quantum memory, quantum processor, and quantum network. The standard c...
Quantum teleportation of physical qubits into logical code spaces
Yi-Han Luo, Ming-Cheng Chen, Manuel Erhard +13 more·Sep 14, 2020
Significance Quantum teleportation and quantum error correction play crucial roles in fault-tolerant quantum computing. Here, we implemented error-correctable quantum teleportation to manipulate a logical qubit and observed the protection of quantum ...
Hilbert-Schmidt speed as an efficient tool in quantum metrology
H. R. Jahromi, R. Franco·Sep 13, 2020
We investigate how the Hilbert-Schmidt speed (HSS), a special type of quantum statistical speed, can be exploited as a powerful and easily computable tool for quantum phase estimation in a $n$-qubit system. We find that, when both the HSS and quantum...
Evidence for long-distance superexchange between semiconductor quantum-dot electron spins
Haifeng Qiao, Y. Kandel, S. Fallahi +4 more·Sep 13, 2020
Due to their long coherence times and potential for scalability, semiconductor quantum-dot spin qubits hold great promise for quantum information processing. However, maintaining high connectivity between quantum-dot spin qubits, which favor linear a...
Experimental authentication of quantum key distribution with post-quantum cryptography
Liu-Jun Wang, Kaiyi Zhang, Jia-Yong Wang +9 more·Sep 10, 2020
Quantum key distribution (QKD) can provide information theoretically secure key exchange even in the era of quantum computers. However, QKD requires the classical channel to be authenticated, the current method for which is pre-sharing symmetric keys...
Inferring the Dynamics of the State Evolution During Quantum Annealing
Elijah Pelofske, Georg Hahn, H. Djidjev·Sep 10, 2020
To solve an optimization problem using a commercial quantum annealer, one has to represent the problem of interest as an Ising or a quadratic unconstrained binary optimization (QUBO) problem and submit its coefficients to the annealer, which then ret...
Near- and long-term quantum algorithmic approaches for vibrational spectroscopy
Nicolas P. D. Sawaya, F. Paesani, Daniel P. Tabor·Sep 10, 2020
Determining the vibrational structure of a molecule is central to fundamental applications in several areas, from atmospheric science to catalysis, fuel combustion modeling, biochemical imaging, and astrochemistry. However, when significant anharmoni...
Correlation-Informed Permutation of Qubits for Reducing Ansatz Depth in the Variational Quantum Eigensolver
N. Tkachenko, James Sud, Yu Zhang +6 more·Sep 10, 2020
The Variational Quantum Eigensolver (VQE) is a method of choice to solve the electronic structure problem for molecules on near-term gate-based quantum computers. However, the circuit depth is expected to grow significantly with problem size. Increas...
A four-qubit germanium quantum processor
N. Hendrickx, W. Lawrie, M. Russ +6 more·Sep 9, 2020
The prospect of building quantum circuits1,2 using advanced semiconductor manufacturing makes quantum dots an attractive platform for quantum information processing3,4. Extensive studies of various materials have led to demonstrations of two-qubit lo...
Breaking adiabatic quantum control with deep learning
Yongcheng Ding, Y. Ban, J. D. Mart'in-Guerrero +3 more·Sep 9, 2020
In the era of digital quantum computing, optimal digitized pulses are requisite for efficient quantum control. This goal is translated into dynamic programming, in which a deep reinforcement learning (DRL) agent is gifted. As a reference, shortcuts t...
Simulation of wave-particle duality in multipath interferometers on a quantum computer
Mirko Amico, Christoph Dittel·Sep 8, 2020
We present an architecture to investigate wave-particle duality in $N$-path interferometers on a universal quantum computer involving as low as $2{log}_{2}N$ qubits and develop a measurement scheme that allows the efficient extraction of quantifiers ...
Exponential speedup in measuring out-of-time-ordered correlators with a single bit of quantum information
P. Sreeram, Naga Dileep Varikuti, V. Madhok·Sep 7, 2020
Out-of-time-ordered correlators (OTOC) are a quantifier of quantum information scrambling and quantum chaos. We propose an efficient quantum algorithm to measure OTOCs that provides an exponential speed-up over the best known classical algorithm prov...
A hybrid quantum-classical conditional generative adversarial network algorithm for human-centered paradigm in cloud
Wenjie Liu, Ying Zhang, Zhiliang Deng +2 more·Sep 3, 2020
As an emerging field that aims to bridge the gap between human activities and computing systems, human-centered computing (HCC) in cloud, edge, fog has had a huge impact on the artificial intelligence algorithms. The quantum generative adversarial ne...