Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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15,669 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Entanglement Negativity Spectrum of Random Mixed States: A Diagrammatic Approach
Hassan Shapourian, Shang Liu, Jonah Kudler-Flam +1 more·Nov 2, 2020
The entanglement properties of random pure states are relevant to a variety of problems ranging from chaotic quantum dynamics to black hole physics. The averaged bipartite entanglement entropy of such states admits a volume law and upon increasing th...
Supersymmetry and Quantum Computation
P. M. Crichigno·Nov 2, 2020
The interplay between supersymmetry and classical and quantum computation is discussed. First, it is shown that the problem of computing the Witten index of $\mathcal N \leq 2$ quantum mechanical systems is $\#P$-complete and therefore intractable. T...
Success-or-Draw: A Strategy Allowing Repeat-Until-Success in Quantum Computation.
Qingxiuxiong Dong, M. T. Quintino, A. Soeda +1 more·Nov 2, 2020
The repeat-until-success strategy is a standard method to obtain success with a probability that grows exponentially with the number of iterations. However, since quantum systems are disturbed after a quantum measurement, how to perform repeat-until-...
Evaluating the noise resilience of variational quantum algorithms
Enrico Fontana, Nathan Fitzpatrick, D. M. Ramo +2 more·Nov 2, 2020
We simulate the effects of different types of noise in state preparation circuits of variational quantum algorithms. We first use a variational quantum eigensolver to find the ground state of a Hamiltonian in presence of noise, and adopt two quality ...
Hybrid Quantum-Classical Algorithms and Quantum Error Mitigation
Suguru Endo, Z. Cai, S. Benjamin +1 more·Nov 2, 2020
Quantum computers can exploit a Hilbert space whose dimension increases exponentially with the number of qubits. In experiment, quantum supremacy has recently been achieved by the Google team by using a noisy intermediate-scale quantum (NISQ) device ...
Optimizing Embedding-Related Quantum Annealing Parameters for Reducing Hardware Bias
Aaron Barbosa, Elijah Pelofske, Georg Hahn +1 more·Nov 2, 2020
Quantum annealers have been designed to propose near-optimal solutions to NP-hard optimization problems. However, the accuracy of current annealers such as the ones of D-Wave Systems, Inc., is limited by environmental noise and hardware biases. One w...
Quantum simulation of light-front parton correlators
M. G. Echevarria, Í. Egusquiza, E. Rico +1 more·Nov 2, 2020
The physics of high-energy colliders relies on the knowledge of different non-perturbative parton correlators, such as parton distribution functions, that encode the information on universal hadron structure and are thus the main building blocks of a...
One-shot quantum error correction of classical and quantum information
Y. Nakata, Eyuri Wakakuwa, H. Yamasaki·Nov 2, 2020
The major goal of quantum communication theory is to determine how much information can be protected from a given quantum noise by encoding operations. The capacity theorems provide answers to the question in various settings. We here provide a capac...
DisQ: A Novel Quantum Output State Classification Method on IBM Quantum Computers using OpenPulse
Tirthak Patel, Devesh Tiwari·Nov 2, 2020
Superconducting quantum computing technology has ushered in a new era of computational possibilities. While a considerable research effort has been geared toward improving the quantum technology and building the software stack to efficiently execute ...
Adiabatic Quantum Graph Matching with Permutation Matrix Constraints
Marcel Seelbach Benkner, Vladislav Golyanik, C. Theobalt +1 more·Nov 1, 2020
Matching problems on 3D shapes and images are challenging as they are frequently formulated as combinatorial quadratic assignment problems (QAPs) with permutation matrix constraints, which are NP-hard. In this work, we address such problems with emer...
On diagonal quantum channels
Amir R. Arab·Oct 31, 2020
In this paper we study diagonal quantum channels and their structure by proving some results and giving most applicable instances of them. Firstly, it is shown that action of every diagonal quantum channel on pure state from computational basis is a ...
Mitigating Coherent Noise by Balancing Weight-2 Z-Stabilizers
Jingzhen Hu, Q. Liang, Narayanan Rengaswamy +1 more·Oct 31, 2020
Physical platforms such as trapped ions suffer from coherent noise that does not follow a simple stochastic model. Stochastic errors in quantum systems occur randomly but coherent errors are more damaging since they can accumulate in a particular dir...
Ultranarrow spectral line of the radiation in double qubit-cavity ultrastrong coupling system.
Teng Zhao, Shao-Ping Wu, Guo-qing Yang +2 more·Oct 30, 2020
The ultrastrongly coupling (USC) system has very important research significance in quantum simulation and quantum computing. In this paper, the ultranarrow spectrum of a circuit QED system with two qubits ultrastrongly coupled to a single-mode cavit...
Qubit guidelines for solid-state spin defects
G. Wolfowicz, F. Heremans, Christopher P. Anderson +5 more·Oct 30, 2020
Defects with associated electron and nuclear spins in solid-state materials have a long history relevant to quantum information science going back to the first spin echo experiments with silicon dopants in the 1950s. Since the turn of the century, th...
Optimizing entanglement generation and distribution using genetic algorithms
Francisco Ferreira da Silva, A. Torres-Knoop, T. Coopmans +2 more·Oct 30, 2020
Long-distance quantum communication via entanglement distribution is of great importance for the quantum internet. However, scaling up to such long distances has proved challenging due to the loss of photons, which grows exponentially with the distan...
Seamless High-Q Microwave Cavities for Multimode Circuit Quantum Electrodynamics.
S. Chakram, Andrew E. Oriani, R. Naik +5 more·Oct 30, 2020
Multimode cavity quantum electrodynamics-where a two-level system interacts simultaneously with many cavity modes-provides a versatile framework for quantum information processing and quantum optics. Because of the combination of long coherence times...
Black hole interior in unitary gauge construction
Y. Nomura·Oct 29, 2020
A quantum system with a black hole accommodates two widely different, though physically equivalent, descriptions. In one description, based on global spacetime of general relativity, the existence of the interior region is manifest, while understandi...
Universal quantum computation and quantum error correction with ultracold atomic mixtures
V. Kasper, D. González-Cuadra, Apoorva Hegde +7 more·Oct 29, 2020
Quantum information platforms made great progress in the control of many-body entanglement and the implementation of quantum error correction, but it remains a challenge to realize both in the same setup. Here, we propose a mixture of two ultracold a...
On construction of finite averaging sets for SL(2,C) via its Cartan decomposition
M. Markiewicz, Janusz Przewocki·Oct 29, 2020
Averaging physical quantities over Lie groups appears in many contexts across the rapidly developing branches of physics like quantum information science or quantum optics. Such an averaging process can be always represented as averaging with respect...
TILT: Achieving Higher Fidelity on a Trapped-Ion Linear-Tape Quantum Computing Architecture
Xin-Chuan Wu, D. Debroy, Yongshan Ding +4 more·Oct 29, 2020
Trapped-ion qubits are a leading technology for practical quantum computing. In this work, we present an architectural analysis of a linear-tape architecture for trapped ions. In order to realize our study, we develop and evaluate mapping and schedul...