Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,666 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Investigating the Chinese postman problem on a quantum annealer
I. Siloi, V. Carnevali, Bibek Pokharel +2 more·Aug 6, 2020
The recent availability of quantum annealers has fueled a new area of information technology where such devices are applied to address practically motivated and computationally difficult problems with hardware that exploits quantum mechanical phenome...
Symmetry Breaking and Error Correction in Open Quantum Systems.
S. Lieu, R. Belyansky, Jeremy T. Young +3 more·Aug 6, 2020
Symmetry-breaking transitions are a well-understood phenomenon of closed quantum systems in quantum optics, condensed matter, and high energy physics. However, symmetry breaking in open systems is less thoroughly understood, in part due to the richer...
A Sparse Model of Quantum Holography
Shenglong Xu, L. Susskind, Yuan Su +1 more·Aug 5, 2020
We study a sparse version of the Sachdev-Ye-Kitaev (SYK) model defined on random hypergraphs constructed either by a random pruning procedure or by randomly sampling regular hypergraphs. The resulting model has a new parameter, $k$, defined as the ra...
Microwave Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems.
P. Magnard, S. Storz, P. Kurpiers +11 more·Aug 4, 2020
Superconducting circuits are a strong contender for realizing quantum computing systems and are also successfully used to study quantum optics and hybrid quantum systems. However, their cryogenic operation temperatures and the current lack of coheren...
Lower bounds on circuit depth of the quantum approximate optimization algorithm
James Ostrowski, R. Herrman, T. Humble +1 more·Aug 4, 2020
The quantum approximate optimization algorithm (QAOA) is a method of approximately solving combinatorial optimization problems. While QAOA is developed to solve a broad class of combinatorial optimization problems, it is not clear which classes of pr...
A divide-and-conquer algorithm for quantum state preparation
Israel F. Araujo, D. Park, Francesco Petruccione +1 more·Aug 4, 2020
Advantages in several fields of research and industry are expected with the rise of quantum computers. However, the computational cost to load classical data in quantum computers can impose restrictions on possible quantum speedups. Known algorithms ...
Processing Quantum Signals Carried by Electrical Currents
B. Roussel, C. Cabart, G. Fève +1 more·Aug 4, 2020
Recent developments in the coherent manipulation of electrons in ballistic conductors include the generation of time-periodic electrical currents involving one to few electronic excitations per period. However, using individual electrons as carrier o...
Quantum amplitude estimation algorithms on IBM quantum devices
P. Rao, Kwangmin Yu, Hyun-Kyung Lim +2 more·Aug 4, 2020
Since the publication of the Quantum Amplitude Estimation (QAE) algorithm by Brassard et al., 2002, several variations have been proposed, such as Aaronson et al., 2019, Grinko et al., 2019, and Suzuki et al., 2020. The main difference between the or...
Cavity-enhanced broadband photonic Rabi oscillation
R. Ikuta, Toshiki Kobayashi, T. Yamazaki +2 more·Aug 4, 2020
A coherent coupling among different energy photons provided by nonlinear optical interaction is regarded as a photonic version of the Rabi oscillation. Cavity enhancement of the nonlinearity reduces energy requirement significantly and pushes the sca...
Coarse-graining holographic states: A semiclassical flow in general spacetimes
Chitraang Murdia, Y. Nomura, Pratik Rath·Aug 4, 2020
© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution o...
Quantum-optimal-control-inspired ansatz for variational quantum algorithms
A. Choquette, A. Di Paolo, P. Barkoutsos +3 more·Aug 3, 2020
A central component of variational quantum algorithms (VQA) is the state-preparation circuit, also known as ansatz or variational form. This circuit is most commonly designed to respect the symmetries of the problem Hamiltonian and, in this way, cons...
Exchange-free computation on an unknown qubit at a distance
Hatim Salih, Jonte R Hance, W. McCutcheon +2 more·Aug 3, 2020
We present a way of directly manipulating an arbitrary qubit, without the exchange of any particles. This includes as an application the exchange-free preparation of an arbitrary quantum state at Alice by a remote classical Bob. As a result, we are a...
Multiport based teleportation - transmission of a large amount of quantum information
Piotr Kopszak, M. Mozrzymas, M. Studzi'nski +1 more·Aug 3, 2020
We analyse the problem of transmitting a number of unknown quantum states or one composite system in one go. We derive a lower bound on the performance of such process, measured in the entanglement fidelity. The obtained bound is effectively computab...
Multi-level Amplitude Damping channels: quantum capacity analysis
S. Chessa, V. Giovannetti·Aug 2, 2020
The set of Multi-level Amplitude Damping (MAD) quantum channels is introduced as a generalization of the standard qubit Amplitude Damping Channel to quantum systems of finite dimension $d$. In the special case of $d=3$, by exploiting degradability, d...
Faster Schrödinger-style simulation of quantum circuits
Aneeqa Fatima, I. Markov·Aug 1, 2020
Recent demonstrations of superconducting quantum computers by Google and IBM and trapped-ion computers from IonQ fueled new research in quantum algorithms, compilation into quantum circuits, and empirical algorithmics. While online access to quantum ...
Short Codes for Quantum Channels With One Prevalent Pauli Error Type
M. Chiani, L. Valentini·Aug 1, 2020
One of the main problems in quantum information systems is the presence of errors due to noise, and for this reason quantum error-correcting codes (QECCs) play a key role. While most of the known codes are designed for correcting generic errors, i.e....
Fast Classical and Quantum Algorithms for Online k-server Problem on Trees
Ruslan Kapralov, K. Khadiev, Joshua Mokut +2 more·Aug 1, 2020
We consider online algorithms for the $k$-server problem on trees. Chrobak and Larmore proposed a $k$-competitive algorithm for this problem that has the optimal competitive ratio. However, a naive implementation of their algorithm has $O(n)$ time co...
Quantum One-class Classification With a Distance-based Classifier
Nicolas M. de Oliveira, Teresa B Ludermir, W. R. Oliveira +1 more·Jul 31, 2020
The advancement of technology in Quantum Computing has brought possibilities for the execution of algorithms in real quantum devices. However, the existing errors in the current quantum hardware and the low number of available qubits make it necessar...
Electrically tuned hyperfine spectrum in neutral Tb(II)(CpiPr5)2 single-molecule magnet.
R. L. Smith, A. L. Wysocki, Kyungwha Park·Jul 31, 2020
Molecular spin qubits with long spin coherence time as well as non-invasive operation methods on such qubits are in high demand. It was shown that both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with do...
Geometrical Formalism for Dynamically Corrected Gates in Multiqubit Systems
Donovan Buterakos, Sankar Das Sarma, Edwin Barnes·Jul 30, 2020
The ability to perform gates in multiqubit systems that are robust to noise is of crucial importance for the advancement of quantum information technologies. However, finding control pulses that cancel noise while performing a gate is made difficult ...