Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,673 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Clustering by quantum annealing on the three-level quantum elements qutrits
V. Zobov, I. Pichkovskiy·Feb 18, 2021
Clustering is grouping of data by the proximity of some properties. We report on the possibility of increasing the efficiency of clustering of points in a plane using artificial quantum neural networks after the replacement of the two-level neurons c...
Intermittency of CsPbBr3 Perovskite Quantum Dots Analyzed by an Unbiased Statistical Analysis
I. Palstra, I. M. de Buy Wenniger, B. Patra +2 more·Feb 18, 2021
We analyze intermittency in intensity and fluorescence lifetime of CsPbBr3 perovskite quantum dots by applying unbiased Bayesian inference analysis methods. We apply change-point analysis (CPA) and a Bayesian state clustering algorithm to determine t...
Quantum control of bosonic modes with superconducting circuits.
Wen-Long Ma, S. Puri, R. Schoelkopf +3 more·Feb 18, 2021
Bosonic modes have wide applications in various quantum technologies, such as optical photons for quantum communication, magnons in spin ensembles for quantum information storage and mechanical modes for reversible microwave-to-optical quantum transd...
Quantum repetition codes as building blocks of large-period discrete time crystals
R. W. Bomantara·Feb 18, 2021
Discrete time crystals (DTCs) are nonequilibrium phases of matter with exotic observable dynamics. Among their remarkable features is their response to a periodic drive at a fraction of its frequency. Current successful experiments are however only l...
Symmetry transformation of subregion bulk representations
Nirmalya Kajuri·Feb 17, 2021
Different AdS-Rindler wedges can be mapped to each other using bulk isometries. In this paper we address how the boundary representations corresponding to the AdS-Rindler wedges transform under such isometries. We show that when a bulk wedge is mappe...
Deterministic algorithms for compiling quantum circuits with recurrent patterns
Davide Ferrari, I. Tavernelli, M. Amoretti·Feb 17, 2021
Current quantum processors are noisy and have limited coherence and imperfect gate implementations. On such hardware, only algorithms that are shorter than the overall coherence time can be implemented and executed successfully. A good quantum compil...
SU(2) hadrons on a quantum computer via a variational approach
Y. Y. Atas, Jinglei Zhang, R. Lewis +3 more·Feb 17, 2021
Quantum computers have the potential to create important new opportunities for ongoing essential research on gauge theories. They can provide simulations that are unattainable on classical computers such as sign-problem afflicted models or time evolu...
Unitary block optimization for variational quantum algorithms
L. Slattery, B. Villalonga, B. Clark·Feb 16, 2021
Variational quantum algorithms are a promising hybrid framework for solving chemistry and physics problems with broad applicability to optimization as well. They are particularly well suited for noisy intermediate scale quantum (NISQ) computers. In t...
Plasmonic Waveguides: Enhancing quantum electrodynamic phenomena at nanoscale
Ying Li, Christos Argyropoulos·Feb 16, 2021
The emerging field of plasmonics may lead to enhanced light–matter interactions at extremely nanoscale regions. Plasmonic (metallic) devices promise to efficiently control classical and quantum properties of light. Plasmonic waveguides are usually em...
Quantum Chaos is Quantum
L. Leone, Salvatore F. E. Oliviero, You Zhou +1 more·Feb 16, 2021
It is well known that a quantum circuit on N qubits composed of Clifford gates with the addition of k non Clifford gates can be simulated on a classical computer by an algorithm scaling as poly(N)exp(k)\cite{bravyi2016improved}. We show that, for a ...
Efficient assessment of process fidelity
S. Greenaway, F. Sauvage, K. Khosla +1 more·Feb 16, 2021
The accurate implementation of quantum gates is essential for the realisation of quantum algorithms and digital quantum simulations. This accuracy may be increased on noisy hardware through the variational optimisation of gates, however the experimen...
Aircraft Loading Optimization -- QUBO models under multiple constraints
Giovanni Pilon, Nicola Gugole, Nicola Massarenti·Feb 16, 2021
In this submission we solve the Aircraft Loading Optimization problem of the Airbus Quantum Computing Challenge. Finding the optimal loading for a plane is a challenging task for classical algorithms, especially because the solution must respect seve...
Hardware-Efficient Leakage-Reduction Scheme for Quantum Error Correction with Superconducting Transmon Qubits
F. Battistel, B. Varbanov, B. Terhal·Feb 16, 2021
Leakage outside of the qubit computational subspace poses a threatening challenge to quantum error correction (QEC). We propose a scheme using two leakage-reduction units (LRUs) that mitigate these issues for a transmon-based surface code, without re...
Orchestrated trios: compiling for efficient communication in Quantum programs with 3-Qubit gates
Casey Duckering, Jonathan M. Baker, Andrew Litteken +1 more·Feb 16, 2021
Current quantum computers are especially error prone and require high levels of optimization to reduce operation counts and maximize the probability the compiled program will succeed. These computers only support operations decomposed into one- and t...
Exchange-mediated mutual correlations and dephasing in free-electrons and light interactions
N. Talebi, I. Březinová·Feb 15, 2021
The quantum world distinguishes itself from the classical world by being governed by probability amplitudes rather than probabilities. On a single-particle level, quantum phases can be manipulated leading to observable interference patterns that can ...
Spin-Dependent Transport Through a Colloidal Quantum Dot: The Role of Exchange Interactions
J. Philbin, Amikam Levy, P. Narang +1 more·Feb 15, 2021
The study of charge and spin transport through semiconductor quantum dots is experiencing a renaissance due to recent advances in nano-fabrication and the realization of quantum dots as candidates for quantum computing. In this work, we combine atomi...
Low-depth quantum state preparation
Xiao-Ming Zhang, M. Yung, Xiao Yuan·Feb 15, 2021
A crucial subroutine in quantum computing is to load the classical data of $N$ complex numbers into the amplitude of a superposed $n=\lceil \log_2N\rceil$-qubit state. It has been proven that any algorithm universally implementing this subroutine wou...
Private learning implies quantum stability
Srinivasan Arunachalam, Yihui Quek, J. Smolin·Feb 14, 2021
Learning an unknown $n$-qubit quantum state $\rho$ is a fundamental challenge in quantum computing. Information-theoretically, it is known that tomography requires exponential in $n$ many copies of $\rho$ to estimate it up to trace distance. Motivate...
Optimizing electronic structure simulations on a trapped-ion quantum computer using problem decomposition
Y. Kawashima, Erika Lloyd, Marc P. Coons +12 more·Feb 14, 2021
Quantum computers have the potential to advance material design and drug discovery by performing costly electronic structure calculations. A critical aspect of this application requires optimizing the limited resources of the quantum hardware. Here, ...
One-dimensional discrete-time quantum walks with general coin
Mahesh N. Jayakody, C. Meena, Priodyuti Pradhan·Feb 14, 2021
Quantum walk (QW) is the quantum analog of the random walk. QW is an integral part of the development of numerous quantum algorithms. Hence, an in-depth understanding of QW helps us to grasp the quantum algorithms. We revisit the one-dimensional disc...