Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Cryogenic characterization and modeling of a CMOS floating-gate device for quantum control hardware
Michele Castriotta, E. Prati, G. Ferrari·Oct 1, 2021
We perform the characterization and modeling of a floatinggate device realized with a commercial 350-nm CMOS technology at cryogenic temperature. The programmability of the device offers a solution in the realization of a precise and flexible cryogen...
Toward the real-time evolution of gauge-invariant <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline
Emilie Huffman, Miguel García Vera, D. Banerjee·Sep 30, 2021
Practical quantum computing holds clear promise in addressing problems not generally tractable with classical simulation techniques, and some key physically interesting applications are those of real-time dynamics in strongly coupled lattice gauge th...
Bounds on stabilizer measurement circuits and obstructions to local implementations of quantum LDPC codes
Nicolas Delfosse, M. Beverland, Maxime Tremblay·Sep 29, 2021
In this work we establish lower bounds on the size of Clifford circuits that measure a family of commuting Pauli operators. Our bounds depend on the interplay between a pair of graphs: the Tanner graph of the set of measured Pauli operators, and the ...
Quantum Simulation of Conformal Field Theory
T. Osborne, Alexander Stottmeister·Sep 29, 2021
Conformal field theory, describing systems with scaling symmetry, plays a crucial role throughout physics. We describe a quantum algorithm to simulate the dynamics of conformal field theories, including the action of local conformal transformations. ...
Quantum simulation and ground state preparation for the honeycomb Kitaev model
Tatiana A. Bespalova, O. Kyriienko·Sep 28, 2021
We propose a quantum protocol that allows preparing a ground state (GS) of the honeycomb Kitaev model. Our approach efficiently uses underlying symmetries and techniques from topological error correction. It is based on the stabilization procedure, t...
Hexagonal matching codes with two-body measurements
James R. Wootton·Sep 27, 2021
Matching codes are stabilizer codes based on Kitaev’s honeycomb lattice model. The hexagonal form of these codes are particularly well-suited to the heavy-hexagon device layouts currently pursued in the hardware of IBM quantum. Here we show how the s...
Digital quantum simulation of NMR experiments
K. Seetharam, D. Biswas, C. Noel +8 more·Sep 27, 2021
Simulations of nuclear magnetic resonance (NMR) experiments can be an important tool for extracting information about molecular structure and optimizing experimental protocols but are often intractable on classical computers for large molecules such ...
A Quantum-Classical Hybrid Method for Image Classification and Segmentation
Sayantani Pramanik, M. Chandra, C. V. Sridhar +9 more·Sep 25, 2021
Enormous activity in the Quantum Computing area has resulted in it being considered, together with classical computers, for solving different difficult problems - including those of applied nature. An attempt is made in this work to assemble a pipeli...
Variational Quantum-Based Simulation of Waveguide Modes
W. Ewe, Dax Enshan Koh, Siong Thye Goh +2 more·Sep 25, 2021
Variational quantum algorithms (VQAs) are one of the most promising methods that can be implemented on noisy intermediate-scale quantum (NISQ) machines to achieve a quantum advantage over classical computers. This article describes the use of a VQA i...
Any-To-Any Connected Cavity-Mediated Architecture for Quantum Computing with Trapped Ions or Rydberg Arrays
Joshua Ramette, Josiah Sinclair, Z. Vendeiro +3 more·Sep 23, 2021
We propose a hardware architecture and protocol for connecting many local quantum processors contained within an optical cavity. The scheme is compatible with trapped ions or Rydberg arrays, and realizes teleported gates between any two qubits by dis...
Performance of the quantum MaxEnt estimation in the presence of physical symmetries
Diego Tielas, M. Losada, L. Rebón +1 more·Sep 22, 2021
When an informationally complete measurement is not available, the reconstruction of the density operator that describes the state of a quantum system can be obtained, in a reliable way, by adopting the maximum entropy principle (MaxEnt principle), a...
Improved graph formalism for quantum circuit simulation
Alexander Tianlin Hu, A. Khesin·Sep 20, 2021
Improving the simulation of quantum circuits on classical computers is important for understand-ing quantum advantage and increasing development speed. In this paper, we explore a new way to express stabilizer states and further improve the speed of ...
A multisite decomposition of the tensor network path integrals.
Amartya Bose, Peter L. Walters·Sep 20, 2021
Tensor network decompositions of path integrals for simulating open quantum systems have recently been proven to be useful. However, these methods scale exponentially with the system size. This makes it challenging to simulate the non-equilibrium dyn...
Quantum hardware calculations of periodic systems with partition-measurement symmetry verification: Simplified models of hydrogen chain and iron crystals
Kentaro Yamamoto, D. Manrique, I. Khan +2 more·Sep 17, 2021
Running quantum algorithms on real hardware is essential for understanding their strengths and limitations, especially in the noisy intermediate scale quantum (NISQ) era. Herein we focus on the practical aspect of quantum computational calculations o...
Investigation of photon emitters in Ce-implanted hexagonal boron nitride
Gabriel I. L'opez-Morales, Mingxing Li, A. Hampel +9 more·Sep 17, 2021
Color centers in hexagonal boron nitride (hBN) are presently attracting broad interest as a novel platform for nanoscale sensing and quantum information processing. Unfortunately, their atomic structures remain largely elusive and only a small percen...
Quantum Newton’s Method for Solving the System of Nonlinear Equations
Cheng Xue, Yuchun Wu, G. Guo·Sep 17, 2021
While quantum computing provides an exponential advantage in solving the system of linear equations, there is little work to solve the system of nonlinear equations with quantum computing. We propose quantum Newton’s method (QNM) for solving [Formula...
Mitigating algorithmic errors in quantum optimization through energy extrapolation
Chenfeng Cao, Yunlong Yu, Zipeng Wu +3 more·Sep 16, 2021
Quantum optimization algorithms offer a promising route to finding the ground states of target Hamiltonians on near-term quantum devices. Nonetheless, it remains necessary to limit the evolution time and circuit depth as much as possible, since other...
Toward practical quantum embedding simulation of realistic chemical systems on near-term quantum computers
Weitang Li, Zigeng Huang, Changsu Cao +6 more·Sep 16, 2021
Quantum computing has recently exhibited great potential in predicting chemical properties for various applications in drug discovery, material design, and catalyst optimization. Progress has been made in simulating small molecules, such as LiH and h...
Error-resilient Monte Carlo quantum simulation of imaginary time
M. Huo, Ying Li·Sep 16, 2021
Computing the ground-state properties of quantum many-body systems is a promising application of near-term quantum hardware with a potential impact in many fields. The conventional algorithm quantum phase estimation uses deep circuits and requires fa...
A Partially Random Trotter Algorithm for Quantum Hamiltonian Simulations
Shi Jin, Xiantao Li·Sep 16, 2021
Given the Hamiltonian, the evaluation of unitary operators has been at the heart of many quantum algorithms. Motivated by existing deterministic and random methods, we present a hybrid approach, where Hamiltonians with large amplitude are evaluated a...