Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Carleman linearization approach for chemical kinetics integration toward quantum computation
Takaki Akiba, Y. Morii, K. Maruta·Jul 5, 2022
The Harrow, Hassidim, Lloyd (HHL) algorithm, known as the pioneering algorithm for solving linear equations in quantum computers, is expected to accelerate solving large-scale linear ordinary differential equations (ODEs). To efficiently combine clas...
Knowledge Distillation in Quantum Neural Network using Approximate Synthesis
M. Alam, Satwik Kundu, Swaroop Ghosh·Jul 5, 2022
Recent assertions of a potential advantage of Quantum Neural Network (QNN) for specific Machine Learning (ML) tasks have sparked the curiosity of a sizable number of application researchers. The parameterized quantum circuit (PQC), a major building b...
Pricing Multiasset Derivatives by Variational Quantum Algorithms
Kenji Kubo, Koichi Miyamoto, K. Mitarai +1 more·Jul 4, 2022
Pricing a multiasset derivative is an important problem in financial engineering, both theoretically and practically. Although it is suitable to numerically solve partial differential equations to calculate the prices of certain types of derivatives,...
Estimating gate complexities for the site-by-site preparation of fermionic vacua
Troy J. Sewell, A. Bapat, S. Jordan·Jul 4, 2022
An important aspect of quantum simulation is the preparation of physically interesting states on a quantum computer, and this task can often be costly or challenging to implement. A digital, ``site-by-site'' scheme of state preparation was introduced...
Preparations for Quantum Simulations of Quantum Chromodynamics in 1+1 Dimensions: (I) Axial Gauge
R. Farrell, I. Chernyshev, Sarah J. M. Powell +3 more·Jul 4, 2022
Tools necessary for quantum simulations of $1+1$ dimensional quantum chromodynamics are developed. When formulated in axial gauge and with two flavors of quarks, this system requires 12 qubits per spatial site with the gauge fields included via non-l...
ScaleQC: A Scalable Framework for Hybrid Computation on Quantum and Classical Processors
Wei Tang, M. Martonosi·Jul 3, 2022
Quantum processing unit (QPU) has to satisfy highly demanding quantity and quality requirements on its qubits to produce accurate results for problems at useful scales. Fur-thermore, classical simulations of quantum circuits generally do not scale. I...
Measurements of Floquet code plaquette stabilizers
James R. Wootton·Jul 1, 2022
The recently introduced Floquet codes have already inspired several follow up works in terms of theory and simulation. Here we report the first preliminary results on their experimental implementation, using IBM Quantum hardware. Specifically, we imp...
Learning quantum systems
Valentin Gebhart, R. Santagati, A. Gentile +7 more·Jul 1, 2022
The complexity of quantum systems increases exponentially with their size, but in many practical contexts there are assumptions (such as low rank, sparsity, or a specific type of expected dynamics) that enable classical algorithms to be efficient in ...
Multipartite Entanglement in Rabi-Driven Superconducting Qubits
Marie Lu, J. Ville, Joachim Cohen +12 more·Jul 1, 2022
Exploring highly connected networks of qubits is invaluable for implementing various quantum algorithms and simulations as it allows for entangling qubits with reduced circuit depth. Here, we demonstrate a multi-qubit STAR (Sideband Tone Assisted Rab...
Rapid training of quantum recurrent neural networks
M. Siemaszko, A. Buraczewski, B. L. Saux +1 more·Jul 1, 2022
Time series prediction is essential for human activities in diverse areas. A common approach to this task is to harness recurrent neural networks (RNNs). However, while their predictions are quite accurate, their learning process is complex and, thus...
Approximate encoding of quantum states using shallow circuits
Matan Ben-Dov, David Shnaiderov, A. Makmal +1 more·Jun 30, 2022
Quantum algorithms and simulations often require the preparation of complex states through sequences of 2-qubit gates. For a generic quantum state, the number of required gates grows exponentially with the number of qubits, becoming unfeasible on nea...
Toward perturbation theory methods on a quantum computer
Junxu Li, Barbara A Jones, S. Kais·Jun 30, 2022
Perturbation theory, used in a wide range of fields, is a powerful tool for approximate solutions to complex problems, starting from the exact solution of a related, simpler problem. Advances in quantum computing, especially over the past several yea...
Exact electronic states with shallow quantum circuits through global optimisation
Hugh G. A. Burton, Daniel Marti-Dafcik, D. Tew +1 more·Jun 30, 2022
Quantum computers promise to revolutionise electronic simulations by overcoming the exponential scaling of many-electron problems. While electronic wave functions can be represented using a product of fermionic unitary operators, shallow quantum circ...
Effective light cone and digital quantum simulation of interacting bosons
Tomotaka Kuwahara, T. Vu, Keiji Saito·Jun 29, 2022
The speed limit of information propagation is one of the most fundamental features in non-equilibrium physics. The region of information propagation by finite-time dynamics is approximately restricted inside the effective light cone that is formulate...
Ion trap long-range XY model for quantum state transfer and optimal spatial search
D. Lewis, L. Banchi, Yi Hong Teoh +2 more·Jun 28, 2022
Linear ion trap chains are a promising platform for quantum computation and simulation. The XY model with long-range interactions can be implemented with a single side-band Mølmer–Sørensen scheme, giving interactions that decay as 1/rα , where α para...
Improved Resource‐Tunable Near‐Term Quantum Algorithms for Transition Probabilities, with Applications in Physics and Variational Quantum Linear Algebra
Nicolas P. D. Sawaya, J. Huh·Jun 28, 2022
Transition amplitudes and transition probabilities are relevant to many areas of physics simulation, including the calculation of response properties and correlation functions. These quantities can also be related to solving linear systems of equatio...
Scalable simulation of quantum measurement process with quantum computers
Meng-Jun Hu, Yanbei Chen, Yiqiu Ma +4 more·Jun 28, 2022
Recent development in quantum information sciences and technologies, especially building programmable quantum computers, provide us new opportunities to study fundamental aspects of quantum mechanics. We propose qubit models to emulate the quantum me...
Scaling adaptive quantum simulation algorithms via operator pool tiling
J. V. Van Dyke, Karunya Shirali, George S. Barron +3 more·Jun 28, 2022
Adaptive variational quantum simulation algorithms use information from the quantum computer to dynamically create optimal trial wavefunctions for a given problem Hamiltonian. A key ingredient in these algorithms is a predefined operator pool from wh...
Observation of critical phase transition in a generalized Aubry-André-Harper model with superconducting circuits
Hao Li, Yong-Yi Wang, Yun-hao Shi +15 more·Jun 27, 2022
Quantum simulation enables study of many-body systems in non-equilibrium by mapping to a controllable quantum system, providing a powerful tool for computational intractable problems. Here, using a programmable quantum processor with a chain of 10 su...
Controlled-Controlled-Phase Gates for Superconducting Qubits Mediated by a Shared Tunable Coupler
N. J. Glaser, F. Roy, S. Filipp·Jun 24, 2022
Applications for noisy intermediate-scale quantum computing devices rely on the efficient entanglement of many qubits to reach a potential quantum advantage. Although entanglement is typically generated using two-qubit gates, direct control of strong...