Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,541 papers in 12 months (-3% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Not All SWAPs Have the Same Cost: A Case for Optimization-Aware Qubit Routing
Ji Liu, Peiyi Li, Huiyang Zhou·Apr 1, 2022
Despite rapid advances in quantum computing technologies, the qubit connectivity limitation remains to be a critical challenge. Both near-term NISQ quantum computers and relatively long-term scalable quantum architectures do not offer full connectivi...
Ising machines as hardware solvers of combinatorial optimization problems
Naeimeh Mohseni, P. McMahon, T. Byrnes·Apr 1, 2022
Ising machines are hardware solvers that aim to find the absolute or approximate ground states of the Ising model. The Ising model is of fundamental computational interest because any problem in the complexity class NP can be formulated as an Ising p...
Perceval: A Software Platform for Discrete Variable Photonic Quantum Computing
Nicolas Heurtel, A. Fyrillas, Grégoire de Gliniasty +13 more·Apr 1, 2022
We introduce Perceval, an open-source software platform for simulating and interfacing with discrete-variable photonic quantum computers, and describe its main features and components. Its Python front-end allows photonic circuits to be composed from...
Quantum approximate optimization algorithm for qudit systems
Yannick Deller, S. Schmitt, M. Lewenstein +5 more·Apr 1, 2022
A frequent starting point of quantum computation platforms are two-state quantum systems, i.e., qubits. However, in the context of integer optimization problems, relevant to scheduling optimization and operations research, it is often more resource-e...
Inverse design of high-dimensional quantum optical circuits in a complex medium
Suraj Goel, Saroch Leedumrongwatthanakun, N. H. Valencia +5 more·Apr 1, 2022
Programmable optical circuits are an important tool in developing quantum technologies such as transceivers for quantum communication and integrated photonic chips for quantum information processing. Maintaining precise control over every individual ...
Entanglement, Complexity, and Causal Asymmetry in Quantum Theories
Porter Williams·Apr 1, 2022
It is often claimed that one cannot locate a notion of causation in fundamental physical theories. The reason most commonly given is that the dynamics of those theories do not support any distinction between the past and the future, and this vitiates...
Temperature dependence of the single photon source efficiency based on QD-cQED
Sarbast W. Abdulqadir, Hawri O. Majeed, N. R. Abdullah·Apr 1, 2022
We study a photonic circuit consisting of a quantum dot, QD, coupled to a photon cavity over a wide range of temperature up to room temperature. A key component of such a system is presented here in the form of a Purcell-enhanced single-photon source...
Measuring magic on a quantum processor
Salvatore F. E. Oliviero, L. Leone, A. Hamma +1 more·Mar 31, 2022
Magic states are the resource that allows quantum computers to attain an advantage over classical computers. This resource consists in the deviation from a property called stabilizerness which in turn implies that stabilizer circuits can be efficient...
Variational Quantum Pulse Learning
Zhiding Liang, Hanrui Wang, Jinglei Cheng +6 more·Mar 31, 2022
Quantum computing is among the most promising emerging techniques to solve problems that are computationally intractable on classical hardware. A large body of existing works focus on using variational quantum algorithms on the gate level for machine...
Fully Tunable Longitudinal Spin-Photon Interactions in Si and Ge Quantum Dots.
S. Bosco, P. Scarlino, J. Klinovaja +1 more·Mar 31, 2022
Spin qubits in silicon and germanium quantum dots are promising platforms for quantum computing, but entangling spin qubits over micrometer distances remains a critical challenge. Current prototypical architectures maximize transversal interactions b...
Quantum control of spin qubits using nanomagnets
Mohamad Niknam, M. F. Chowdhury, M. Rajib +5 more·Mar 31, 2022
Single-qubit gates are essential components of a universal quantum computer. Without selective addressing of individual qubits, scalable implementation of quantum algorithms is extremely challenging. When the qubits are discrete points or regions on ...
Quantum simulation of real-space dynamics
Andrew M. Childs, J. Leng, Tongyang Li +2 more·Mar 31, 2022
<jats:p>Quantum simulation is a prominent application of quantum computers. While there is extensive previous work on simulating finite-dimensional systems, less is known about quantum algorithms for real-space dynamics. We conduct a systematic study...
Quantum open system identification via global optimization: Optimally accurate Markovian models of open systems from time-series data
D. Bondar, Zakhar Popovych, K. Jacobs +2 more·Mar 31, 2022
Accurate models of the dynamics of quantum circuits are essential for optimizing and advancing quantum devices. Since first-principles models of environmental noise and dissipation in real quantum systems are often unavailable, deriving accurate mode...
Optimisation of electrically-driven multi-donor quantum dot qubits
Abhikbrata Sarkar, Joel Hochstetter, Allen Kha +4 more·Mar 30, 2022
(Dated: Multi-donor quantum dots have been at the forefront of recent progress in Si-based quantum computation. Among them, 2 P : 1 P qubits have a built-in dipole moment, making them ideal for electron dipole spin resonance (EDSR) using the donor hy...
High fidelity two-qubit gates on fluxoniums using a tunable coupler
I. N. Moskalenko, I. A. Simakov, N. Abramov +7 more·Mar 30, 2022
Superconducting fluxonium qubits provide a promising alternative to transmons on the path toward large-scale superconductor-based quantum computing due to their better coherence and larger anharmonicity. A major challenge for multi-qubit fluxonium de...
Monte Carlo Tree Search based Hybrid Optimization of Variational Quantum Circuits
Jiahao Yao, Haoya Li, Marin Bukov +2 more·Mar 30, 2022
Variational quantum algorithms stand at the forefront of simulations on near-term and future fault-tolerant quantum devices. While most variational quantum algorithms involve only continuous optimization variables, the representational power of the v...
Random quantum circuits are approximate unitary t-designs in depth O(nt5+o(1))
J. Haferkamp·Mar 30, 2022
The applications of random quantum circuits range from quantum computing and quantum many-body systems to the physics of black holes. Many of these applications are related to the generation of quantum pseudorandomness: Random quantum circuits are kn...
Improved Quantum Algorithms for Fidelity Estimation
Andr'as Gily'en, Alexander Poremba·Mar 30, 2022
Fidelity is a fundamental measure for the closeness of two quantum states, which is important both from a theoretical and a practical point of view. Yet, in general, it is difficult to give good estimates of fidelity, especially when one works with mixe...
Entanglement dynamics of noisy random circuits
Zhi Li, Shengqi Sang, T. Hsieh·Mar 30, 2022
The process by which open quantum systems thermalize with an environment is both of fun-damental interest and relevant to noisy quantum devices. As a minimal model of this process, we consider a qudit chain evolving under local random unitaries and l...
Hardware Efficient Quantum Simulation of Non-Abelian Gauge Theories with Qudits on Rydberg Platforms.
D. González-Cuadra, T. Zache, J. Carrasco +2 more·Mar 29, 2022
Non-Abelian gauge theories underlie our understanding of fundamental forces in nature, and developing tailored quantum hardware and algorithms to simulate them is an outstanding challenge in the rapidly evolving field of quantum simulation. Here we t...