Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,881 papers in 12 months (-10% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Toward Cosmological Simulations of Dark Matter on Quantum Computers
Philip Mocz, Aaron Szasz·Jan 14, 2021
State-of-the-art cosmological simulations on classical computers are limited by time, energy, and memory usage. Quantum computers can perform some calculations exponentially faster than classical computers, using exponentially less energy and memory,...
Quantum option pricing using Wick rotated imaginary time evolution
Santosh Kumar Radha·Jan 12, 2021
In this paper we reformulate the problem of pricing options in a quantum setting. Our proposed algorithm involves preparing an initial state, representing the option price, and then evolving it using existing imaginary time simulation algorithms. Thi...
Cold ion beam in a storage ring as a platform for large-scale quantum computers and simulators: Challenges and directions for research and development
T. Shaftan, B. Blinov·Jan 12, 2021
The purpose of this paper is to evaluate the possibility of constructing a large-scale storage-ring-type iontrap system capable of storing, cooling, and controlling a large number of ions as a platform for scalable quantum computing (QC) and quantum ...
Error mitigation in quantum metrology via zero noise extrapolation
Zhuo Zhao, K. C. Tan·Jan 11, 2021
We consider Zero Noise Extrapolation (ZNE) as an error mitigation strategy in quantum metrology. It is shown that noise expansion can be systematically performed over sufficiently short time scales for general Markovian noise models described by the ...
Efficient Hamiltonian simulation for solving option price dynamics
Javier Gonzalez-Conde, Ángel Rodríguez-Rozas, E. Solano +1 more·Jan 11, 2021
Pricing financial derivatives, in particular European-style options at different time-maturities and strikes, means a relevant problem in finance. The dynamics describing the price of vanilla options when constant volatilities and interest rates are ...
Quantum Simulation of the Bosonic Creutz Ladder with a Parametric Cavity.
Jimmy S. C. Hung, J. Busnaina, C. S. Chang +6 more·Jan 11, 2021
There has been a growing interest in realizing quantum simulators for physical systems where perturbative methods are ineffective. The scalability and flexibility of circuit quantum electrodynamics make it a promising platform for implementing variou...
Bright Electrically Controllable Quantum‐Dot‐Molecule Devices Fabricated by In Situ Electron‐Beam Lithography
Johannes Schall, M. Deconinck, N. Bart +15 more·Jan 10, 2021
Self‐organized semiconductor quantum dots represent almost ideal two‐level systems, which have strong potential to applications in photonic quantum technologies. For instance, they can act as emitters in close‐to‐ideal quantum light sources. Coupled ...
Miniaturizing neural networks for charge state autotuning in quantum dots
Stefanie Czischek, Victor Yon, Marc-Antoine Genest +8 more·Jan 8, 2021
A key challenge in scaling quantum computers is the calibration and control of multiple qubits. In solid-state quantum dots (QDs), the gate voltages required to stabilize quantized charges are unique for each individual qubit, resulting in a high-dim...
Simulating Finite-Time Isothermal Processes with Superconducting Quantum Circuits
Jin-Fu Chen, Ying Li, Hui Dong·Jan 8, 2021
Finite-time isothermal processes are ubiquitous in quantum-heat-engine cycles, yet complicated due to the coexistence of the changing Hamiltonian and the interaction with the thermal bath. Such complexity prevents classical thermodynamic measurements...
Modeling and mitigation of cross-talk effects in readout noise with applications to the Quantum Approximate Optimization Algorithm
Filip B. Maciejewski, F. Baccari, Z. Zimbor'as +1 more·Jan 7, 2021
Measurement noise is one of the main sources of errors in currently available quantum devices based on superconducting qubits. At the same time, the complexity of its characterization and mitigation often exhibits exponential scaling with the system ...
Meissner levitation of a permanent magnet within a superconducting radio frequency cavity
N. K. Raut, Jeffery Miller, R. Chiao +1 more·Jan 5, 2021
We report the first experimental demonstration of Meissner-effect levitation of a millimeter-scale neodymium magnet within a cm-scale superconducting aluminum coaxial quarter-wave stub cavity. The coaxial mode's resonance frequency shifts as a functi...
Quantum walk processes in quantum devices
Anandu Kalleri Madhu, A. Melnikov, Leonid Fedichkin +2 more·Dec 28, 2020
Simulation and programming of current quantum computers as Noisy Intermediate-Scale Quantum (NISQ) devices represent a hot topic at the border of current physical and information sciences. The quantum walk process represents a basic subroutine in man...
Monte Carlo Quantum Computing
David H. Wei·Dec 28, 2020
It is shown that a particular class of so-called strongly frustration-free manybody Hamiltonians can be Monte Carlo simulated efficiently on a classical computing machine, because the ground state of such a Hamiltonian is locally determined in the se...
Quantum Circuit Evolution on NISQ Devices
L. Franken, B. Georgiev, Sascha Mucke +4 more·Dec 23, 2020
Variational quantum circuits build the foundation for various classes of quantum algorithms. In a nutshell, the weights of a parametrized quantum circuit are varied until the empirical sampling distribution of the circuit is sufficiently close to a d...
Stable iPEPO Tensor-Network Algorithm for Dynamics of Two-Dimensional Open Quantum Lattice Models
Conor Mc Keever, Marzena H. Szyma'nska·Dec 22, 2020
Being able to describe accurately the dynamics and steady-states of driven and/or dissipative but quantum correlated lattice models is of fundamental importance in many areas of science: from quantum information to biology. An efficient numerical sim...
Quantum phases of matter on a 256-atom programmable quantum simulator
S. Ebadi, Tout T. Wang, H. Levine +12 more·Dec 22, 2020
Motivated by far-reaching applications ranging from quantum simulations of complex processes in physics and chemistry to quantum information processing1, a broad effort is currently underway to build large-scale programmable quantum systems. Such sys...
Improved Strong Simulation of Universal Quantum Circuits
L. Kocia·Dec 21, 2020
We find a scaling reduction in the stabilizer rank of the twelve-qubit tensored $T$ gate magic state. This lowers its asymptotic bound to $2^{\sim 0.463 t}$ for multi-Pauli measurements on $t$ magic states, improving over the best previously found bo...
Quantum reinforcement learning in continuous action space
Shaojun Wu, Shan Jin, Dingding Wen +1 more·Dec 19, 2020
Quantum reinforcement learning (QRL) is a promising paradigm for near-term quantum devices. While existing QRL methods have shown success in discrete action spaces, extending these techniques to continuous domains is challenging due to the curse of d...
Long-range connectivity in a superconducting quantum processor using a ring resonator.
Sumeru Hazra, A. Bhattacharjee, M. Chand +4 more·Dec 17, 2020
Qubit coherence and gate fidelity are typically considered the two most important metrics for characterizing a quantum processor. An equally important metric is inter-qubit connectivity as it minimizes gate count and allows implementing algorithms ef...
QGo: Scalable Quantum Circuit Optimization Using Automated Synthesis
Xin-Chuan Wu, M. Davis, F. Chong +1 more·Dec 17, 2020
—The current phase of quantum computing is in the Noisy Intermediate-Scale Quantum (NISQ) era. On NISQ devices, two-qubit gates such as CNOTs are much noisier than single-qubit gates, so it is essential to minimize their count. Quantum circuit synthe...