Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
QuOCS: The quantum optimal control suite
M. Rossignolo, Thomas Reisser, A. Marshall +9 more·Dec 21, 2022
Quantum optimal control includes the family of pulse-shaping algorithms that aim to unlock the full potential of a variety of quantum technologies. Our Quantum Optimal Control Suite (QuOCS) unites experimental focus and model-based approaches in a un...
Efficient high-fidelity flying qubit shaping
B. Tissot, G. Burkard·Dec 21, 2022
Matter qubit to traveling photonic qubit conversion is the cornerstone of numerous quantum technologies such as distributed quantum computing, as well as several quantum internet and networking protocols. We formulate a theory for stimulated Raman em...
Realization of a quantum neural network using repeat-until-success circuits in a superconducting quantum processor
M. Moreira, G. Guerreschi, W. Vlothuizen +14 more·Dec 21, 2022
Artificial neural networks are becoming an integral part of digital solutions to complex problems. However, employing neural networks on quantum processors faces challenges related to the implementation of non-linear functions using quantum circuits....
Learning efficient decoders for quasichaotic quantum scramblers
L. Leone, Salvatore F. E. Oliviero, S. Lloyd +1 more·Dec 21, 2022
Scrambling of quantum information is an important feature at the root of randomization and benchmarking protocols, the onset of quantum chaos, and black-hole physics. Unscrambling this information is possible given perfect knowledge of the scrambler ...
Recursive relations and quantum eigensolver algorithms within modified Schrieffer-Wolff transformations for the Hubbard dimer
Quentin Mar'ecat, Bruno Senjean, M. Saubanère·Dec 21, 2022
We derive recursive relations for the Schrieffer--Wolff (SW) transformation applied to the half-filled Hubbard dimer. While the standard SW transformation is set to block-diagonalize the transformed Hamiltonian solely at the first order of perturbati...
On the representation-free formalism in quantum mechanics
V. D. Efros·Dec 20, 2022
The widespread bra-ket formalism offers valuable tools for conducting representation-free considerations in quantum theory. However, it is not without its drawbacks. In this work, we discuss these drawbacks in detail and subsequently construct a new ...
Ultrafast Entanglement Dynamics in Monitored Quantum Circuits
Shengqi Sang, Zhi Li, T. Hsieh +1 more·Dec 20, 2022
Projective measurement, a basic operation in quantum mechanics, can induce seemingly nonlocal effects. In this work, we analyze such effects in many-body systems by studying the non-equilibrium dynamics of weakly monitored quantum circuits, focusing ...
Performance of Uncoded Implementation of Grover’s Algorithm on Today’s Quantum Processors
Yunos El Kaderi, A. Honecker, I. Andriyanova·Dec 20, 2022
This work tests the performance of Grover’s search circuits on some IBM superconducting quantum devices in case of the size of search space N = 16 and N = 32. Ideally, we expect to get an outcome probability distribution that is clearly peaked at the...
Distributed Quantum Computing: a Survey
M. Caleffi, M. Amoretti, Davide Ferrari +4 more·Dec 20, 2022
Nowadays, quantum computing has reached the engineering phase, with fully-functional quantum processors integrating hundred of noisy qubits available. Yet -- to fully unveil the potential of quantum computing out of the labs and into business reality...
Variational Quantum Soft Actor-Critic for Robotic Arm Control
Alberto Acuto, Paola Barillà, Ludovico Bozzolo +3 more·Dec 20, 2022
Deep Reinforcement Learning is emerging as a promising approach for the continuous control task of robotic arm movement. However, the challenges of learning robust and versatile control capabilities are still far from being resolved for real-world ap...
Sharp complexity phase transitions generated by entanglement
Soumik Ghosh, A. Deshpande, D. Hangleiter +2 more·Dec 20, 2022
Entanglement is one of the physical properties of quantum systems responsible for the computational hardness of simulating quantum systems. But while the runtime of specific algorithms, notably tensor network algorithms, explicitly depends on the amo...
Robust control and optimal Rydberg states for neutral atom two-qubit gates
M. Mohan, R. D. de Keijzer, S. Kokkelmans·Dec 20, 2022
We investigate the robustness of two-qubit gates to deviations of experimental controls, on a neutral atom platform utilizing Rydberg states. We construct robust CZ gates - employing techniques from quantum optimal control - that retain high Bell sta...
Tensor-network-assisted variational quantum algorithm
Jun-Jie Huang, Wenhao He, Yukun Zhang +3 more·Dec 20, 2022
Near-term quantum devices generally suffer from shallow circuit depth and hence limited expressivity due to noise and decoherence. To address this, we propose tensor-network-assisted parametrized quantum circuits, which concatenate a classical tensor...
Matrix product channel: Variationally optimized quantum tensor network to mitigate noise and reduce errors for the variational quantum eigensolver
S. Filippov, Boris Sokolov, M. Rossi +5 more·Dec 20, 2022
Quantum processing units boost entanglement at the level of hardware and enable physical simulations of highly correlated electron states in molecules and intermolecular chemical bonds. The variational quantum eigensolver provides a hardware-efficien...
Bonsai Algorithm: Grow Your Own Fermion-to-Qubit Mappings
A. Miller, Zolt'an Zimbor'as, S. Knecht +2 more·Dec 19, 2022
Fermion-to-qubit mappings are used to represent fermionic modes on quantum computers, an essential first step in many quantum algorithms for electronic structure calculations. In this work, we present a formalism to design flexible fermion-to-qubit m...
BosonSampling.jl: A Julia package for quantum multi-photon interferometry
Benoît Seron, A. Restivo·Dec 19, 2022
We present a free open source package for high performance simulation and numerical investigation of boson samplers and, more generally, multi-photon interferometry. Our package is written in Julia, allowing C-like performance with easy notations and...
Robustness of quantum reinforcement learning under hardware errors
Andrea Skolik, Stefano Mangini, Thomas Bäck +2 more·Dec 19, 2022
Variational quantum machine learning algorithms have become the focus of recent research on how to utilize near-term quantum devices for machine learning tasks. They are considered suitable for this as the circuits that are run can be tailored to the...
Quantum algorithms for generator coordinate methods
Muqing Zheng, Bo Peng, N. Wiebe +3 more·Dec 19, 2022
This paper discusses quantum algorithms for the generator coordinate method (GCM) that can be used to benchmark molecular systems. The GCM formalism defined by exponential operators with exponents defined through generators of the Fermionic U(N) Lie ...
Disentangling interacting systems with fermionic Gaussian circuits: Application to quantum impurity models
A. Wu, Benedikt Kloss, Wladislaw Krinitsin +3 more·Dec 19, 2022
Tensor network quantum states are powerful tools for strongly correlated systems, tailored to capture local correlations such as in ground states with entanglement area laws. When applying tensor network states to interacting fermionic systems, a pro...
Unitarity Estimation for Quantum Channels
Kean Chen, Qisheng Wang, Peixun Long +1 more·Dec 19, 2022
Estimating the unitarity of an unknown quantum channel <inline-formula> <tex-math notation="LaTeX">$\mathcal {E}$ </tex-math></inline-formula> provides information on how much it is unitary, which is a basic and important problem in quantum device ce...