Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Constraints on magic state protocols from the statistical mechanics of Wigner negativity
Nikolaos Koukoulekidis, D. Jennings·Jun 29, 2021
Magic states are key ingredients in schemes to realize universal fault-tolerant quantum computation. Theories of magic states attempt to quantify this computational element via monotones and determine how these states may be efficiently transformed i...
A hybrid algorithm to solve linear systems of equations with limited qubit resources
Fang Gao, Guojian Wu, Mingyu Yang +2 more·Jun 29, 2021
The solution of linear systems of equations is a very frequent operation and thus important in many fields. The complexity using classical methods increases linearly with the size of equations. The HHL algorithm proposed by Harrow et al. achieves exp...
Circuit-Depth Reduction of Unitary-Coupled-Cluster Ansatz by Energy Sorting.
Yi Fan, Changsu Cao, Xusheng Xu +3 more·Jun 29, 2021
Quantum computation represents a revolutionary approach to solving problems in quantum chemistry. However, due to the limited quantum resources in the current noisy intermediate-scale quantum (NISQ) devices, quantum algorithms for large chemical syst...
Variational quantum eigensolver for SU(N) fermions
M. Consiglio, W. J. Chetcuti, Carlos Bravo-Prieto +5 more·Jun 29, 2021
Variational quantum algorithms aim at harnessing the power of noisy intermediate-scale quantum (NISQ) computers, by using a classical optimizer to train a parameterized quantum circuit to solve tractable quantum problems. The variational quantum eige...
Importance of Diagonal Gates in Tensor Network Simulations
Danylo Lykov, Y. Alexeev·Jun 29, 2021
In this work, we present two techniques that tremendously increase the performance of tensor-network based quantum circuit simulations. The techniques are implemented in the QTensor package and benchmarked using Quantum Approximate Optimization Algor...
Generalizing Syndrome Decoding problem to the totally Non-negative Grassmannian
K. Emerole·Jun 29, 2021
The syndrome decoding problem has been proposed as a computational hardness assumption for code based cryptosystem that are safe against quantum computing. The problem has been reduced to finding the codeword with the smallest non-zero columns that w...
Low-symmetry nanophotonics
A. Krasnok, Andrea Al'u·Jun 29, 2021
Photonics and optoelectronics are at the foundations of widespread technologies, from high-speed Internet to systems for artificial intelligence, automotive LiDAR, and optical quantum computing. Light enables ultrafast speeds and low energy for all-o...
Strain induced coupling and quantum information processing with hexagonal boron nitride quantum emitters
Fatemeh Tarighitabesh, Q. Hassanzada, M. Hadian +3 more·Jun 29, 2021
We propose an electromechanical scheme where the electronic degrees of freedom of boron vacancy color centers hosted by a hexagonal boron nitride (hBN) nanoribbon are coupled for quantum information processing. The mutual coupling of color centers is...
Recovery algorithms for Clifford Hayden-Preskill problem
B. Yoshida·Jun 29, 2021
The Hayden-Preskill recovery problem has provided useful insights on physics of quantum black holes as well as dynamics in quantum many-body systems from the viewpoint of quantum errorcorrecting codes. While finding an efficient universal information...
Dephasing of Majorana qubits due to quasistatic disorder
P. Boross, A. P'alyi·Jun 29, 2021
Quantum bits based on Majorana zero modes are expected to be robust against certain noise types, and hence provide a quantum computing platform that is superior to conventional qubits. This robustness is not complete though: imperfections can still l...
On Exploring the Potential of Quantum Auto-Encoder for Learning Quantum Systems
Yuxuan Du, D. Tao·Jun 29, 2021
The frequent interactions between quantum computing and machine learning revolutionize both fields. One prototypical achievement is the quantum auto-encoder (QAE), as the leading strategy to relieve the curse of dimensionality ubiquitous in the quant...
Parametric study for optimal performance of Coulomb-coupled quantum dots
Kumhyok Jong, SongJin Ri, Chol-Won Ri·Jun 28, 2021
We study the optimal output power and efficiency of the three-terminal quantum heat engine with Coulomb-coupled quantum-dots (CCQD). It has been well known that in the weak coupling regime, two kinds of dominant transport mechanisms are sequential tu...
Adaptive random quantum eigensolver
N. Barraza, C. Pan, L. Lamata +2 more·Jun 28, 2021
We propose an adaptive random quantum algorithm to obtain an optimized eigensolver. Specifically, we introduce a general method to parametrize and optimize the probability density function of a random number generator, which is the core of stochastic ...
Strong Quantum Computational Advantage Using a Superconducting Quantum Processor.
Yulin Wu, Wansu Bao, S. Cao +51 more·Jun 28, 2021
Scaling up to a large number of qubits with high-precision control is essential in the demonstrations of quantum computational advantage to exponentially outpace the classical hardware and algorithmic improvements. Here, we develop a two-dimensional ...
Realizing coherently convertible dual-type qubits with the same ion species
H.-X. Yang, J.-Y. Ma, Y. Wu +7 more·Jun 28, 2021
Trapped ions constitute one of the most promising systems for implementing quantum computing and networking1,2. For large-scale ion-trap-based quantum computers and networks, it is critical to have two types of qubit: one for computation and storage,...
Algorithmic Randomness and Kolmogorov Complexity for Qubits
Tejas Bhojraj·Jun 27, 2021
Nies and Scholz defined quantum Martin-L\"of randomness (q-MLR) for states (infinite qubitstrings). We define a notion of quantum Solovay randomness and show it to be equivalent to q-MLR using purely linear algebraic methods. Quantum Schnorr randomne...
Optimal Control of Closed Quantum Systems via B-Splines with Carrier Waves
N. Petersson, Fortino Garcia·Jun 27, 2021
. We consider the optimal control problem of determining electromagnetic pulses for implementing logical gates in a closed quantum system, where the Hamiltonian models the dynamics of coupled superconducting qudits. The quantum state is governed by S...
Single-qubit universal classifier implemented on an ion-trap quantum device
T. Dutta, Adri'an P'erez-Salinas, Jasper Phua Sing Cheng +2 more·Jun 26, 2021
Quantum computers can provide solutions to classically intractable problems under specific and adequate conditions. However, current devices have only limited computational resources, and an effort is made to develop useful quantum algorithms under t...
Fast quantum circuit simulation using hardware accelerated general purpose libraries
O. Oumarou, A. Paler, Robert Basmadjian·Jun 26, 2021
Quantum circuit simulators have a long tradition of exploiting massive hardware parallelism. Most of the times, parallelism has been supported by special purpose libraries tailored specifically for the quantum circuits. Quantum circuit simulators are...
Quantum Computing for Artificial Intelligence Based Mobile Network Optimization
F. Ahmed, P. Mähönen·Jun 26, 2021
In this paper, we discuss how certain radio access network optimization problems can be modelled using the concept of constraint satisfaction problems in artificial intelligence, and solved at scale using a quantum computer. As a case study, we discu...