Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,744 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
QPCF: Higher-Order Languages and Quantum Circuits
Luca Paolini, M. Piccolo, M. Zorzi·Sep 15, 2018
qPCF is a paradigmatic quantum programming language that extends PCF with quantum circuits and a quantum co-processor. Quantum circuits are treated as classical data that can be duplicated and manipulated in flexible ways by means of a dependent type...
Coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures
J. Wang, D. Rodan-Legrain, L. Bretheau +14 more·Sep 14, 2018
Quantum coherence and control is foundational to the science and engineering of quantum systems1,2. In van der Waals materials, the collective coherent behaviour of carriers has been probed successfully by transport measurements3–6. However, temporal...
Leftover Hashing From Quantum Error Correction: Unifying the Two Approaches to the Security Proof of Quantum Key Distribution
T. Tsurumaru·Sep 14, 2018
We show that the Mayers-Shor-Preskill approach and Renner’s approach to proving the security of quantum key distribution (QKD) are essentially the same. We begin our analysis by considering a special case of QKD called privacy amplification (PA). PA ...
Gate-Efficient Simulation of Molecular Eigenstates on a Quantum Computer
M. Ganzhorn, D. Egger, P. Barkoutsos +8 more·Sep 13, 2018
A key requirement to perform simulations of large quantum systems on near-term quantum hardware is the design of quantum algorithms with short circuit depth that finish within the available coherence time. A way to stay within the limits of coherence...
Classical algorithm for quantum SU(2) Schur sampling
Vojtěch Havlíček, Sergii Strelchuk, K. Temme·Sep 13, 2018
Many quantum algorithms can be represented in a form of a classical circuit positioned between quantum Fourier transformations. Motivated by the search for new quantum algorithms, we turn to circuits where the latter transformation is replaced by the...
A controlled-NOT gate for frequency-bin qubits
Hsuan-Hao Lu, J. Lukens, B. Williams +4 more·Sep 13, 2018
The realization of strong photon–photon interactions has presented an enduring challenge across photonics, particularly in quantum computing, where two-photon gates form essential components for scalable quantum information processing (QIP). While li...
Gate-based high fidelity spin readout in a CMOS device
M. Urdampilleta, D. Niegemann, E. Chanrion +13 more·Sep 12, 2018
The engineering of a compact qubit unit cell that embeds all quantum functionalities is mandatory for large-scale integration. In addition, these functionalities should present the lowest error rate possible to successfully implement quantum error co...
A fiber based diamond RF B-field sensor and characterization of a small helical antenna
M. Dong, Z. Z. Hu, Y. Liu +3 more·Sep 12, 2018
We present a microwave B-field scanning imaging technique using diamond micro-crystal containing nitrogen vacancy center that is attached to a fiber tip. We propose a pulsed modulation technique, enabling the implementation of a variety of pulsed qua...
Exploring More-Coherent Quantum Annealing
S. Novikov, R. Hinkey, S. Disseler +6 more·Sep 12, 2018
In the quest to reboot computing, quantum annealing (QA) is an interesting candidate for a new capability. While it has not demonstrated an advantage over classical computing on a real-world application, many important regions of the QA design space ...
Production of photonic universal quantum gates enhanced by machine learning
K. Sabapathy, H. Qi, J. Izaac +1 more·Sep 12, 2018
We introduce photonic architectures for universal quantum computation. The first step is to produce a resource state which is a superposition of the first four Fock states with a probability $\geq 10^{-2}$, an increase by a factor of $10^4$ over stan...
A CMOS dynamic random access architecture for radio-frequency readout of quantum devices
S. Schaal, A. Rossi, V. Ciriano-Tejel +5 more·Sep 11, 2018
As quantum processors become more complex, they will require efficient interfaces to deliver signals for control and readout while keeping the number of inputs manageable. Complementary metal–oxide–semiconductor (CMOS) electronics offers established ...
Quantum algorithms for structured prediction
Behrooz Sepehry, E. Iranmanesh, M. Friedlander +1 more·Sep 11, 2018
We introduce two quantum algorithms for solving structured prediction problems. We first show that a stochastic gradient descent that uses the quantum minimum finding algorithm and takes its probabilistic failure into account solves the structured pr...
Strategies for quantum races
Troy Lee, Maharshi Ray, M. Santha·Sep 11, 2018
We initiate the study of quantum races, games where two or more quantum computers compete to solve a computational problem. While the problem of dueling algorithms has been studied for classical deterministic algorithms, the quantum case presents add...
p-Bits for Probabilistic Spin Logic
Kerem Y Çamsarı, Brian M. Sutton, S. Datta·Sep 11, 2018
We introduce the concept of a probabilistic or p-bit, intermediate between the standard bits of digital electronics and the emerging q-bits of quantum computing. We show that low barrier magnets or LBM's provide a natural physical representation for ...
Qubit Coupled Cluster Method: A Systematic Approach to Quantum Chemistry on a Quantum Computer.
I. G. Ryabinkin, Tzu-Ching Yen, Scott N. Genin +1 more·Sep 11, 2018
A unitary coupled cluster (UCC) form for the wave function in the variational quantum eigensolver has been suggested as a systematic way to go beyond the mean-field approximation and include electron correlation in solving quantum chemistry problems ...
Quantum simulation and optimization in hot quantum networks
M. Schuetz, B. Vermersch, G. Kirchmair +4 more·Sep 11, 2018
We propose a setup based on (solid-state) qubits coupled to a common multimode transmission line, which allows for coherent spin-spin interactions over macroscopic on-chip distances, without any ground-state cooling requirements for the data bus. Our...
Tutorial on the Quantikz Package
Alastair Kay·Sep 10, 2018
This tutorial introduces (and provides, via the document source) the Quantikz LaTeX package for typesetting quantum circuit diagrams. This takes advantage of tikz to give greater control over the circuit options. Those familiar with the excellent QCi...
Qiskit Backend Specifications for OpenQASM and OpenPulse Experiments
D. McKay, Thomas Alexander, Luciano Bello +17 more·Sep 10, 2018
As interest in quantum computing grows, there is a pressing need for standardized API's so that algorithm designers, circuit designers, and physicists can be provided a common reference frame for designing, executing, and optimizing experiments. Ther...
Approaching the adiabatic timescale with machine learning
B. M. Henson, Dong K Shin, K. F. Thomas +4 more·Sep 10, 2018
Significance Engineering the fast evolution of a quantum system between states is a key problem to be solved in the development of quantum technologies, such as quantum computing. We experimentally demonstrate a general approach using a machine-learn...
High-efficiency shallow-etched grating on GaAs membranes for quantum photonic applications
Xiaoyan Zhou, I. Kulkova, T. Lund-Hansen +3 more·Sep 10, 2018
We have designed and fabricated a shallow-etched grating on gallium arsenide nanomembranes for efficient chip-to-fiber coupling in quantum photonic integrated circuits. Experimental results show that the grating provides a fiber-coupling efficiency o...