Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Molecular Symmetry in VQE: A Dual Approach for Trapped-Ion Simulations of Benzene
J. Goings, Luning Zhao, J. Jakowski +2 more·Aug 1, 2023
Understanding complex chemical systems—such as biomolecules, catalysts, and novel materials—is a central goal of quantum simulations. Near-term strategies hinge on the use of variational quantum eigensolver (VQE) algorithms combined with a suitable a...
qgym: A Gym for Training and Benchmarking RL-Based Quantum Compilation
S. V. D. Linde, Willem de Kok, T. Bontekoe +1 more·Aug 1, 2023
Compiling a quantum circuit for specific quantum hardware is a challenging task. Moreover, current quantum computers have severe hardware limitations. To make the most use of the limited resources, the compilation process should be optimized. To impr...
Electrically-programmable frequency comb for compact quantum photonic circuits
Shakir Ullah, M. Tasgin, R. Ovali +1 more·Aug 1, 2023
Recent efforts have demonstrated the first prototypes of compact and programmable photonic quantum computers~(PQCs). Utilization of time-bin encoding in loop-like architectures enabled a programmable generation of quantum states and execution of diff...
CMOS on-chip thermometry at deep cryogenic temperatures
G. M. Noah, T. Swift, Mathieu de Kruijf +3 more·Aug 1, 2023
Accurate on-chip temperature sensing is critical for the optimal performance of modern complementary metal-oxide-semiconductor (CMOS) integrated circuits (ICs), to understand and monitor localized heating around the chip during operation. The develop...
Auxiliary-assisted energy distillation from quantum batteries
Paranjoy Chaki, Aparajita Bhattacharyya, Kornikar Sen +1 more·Jul 31, 2023
We discuss the idea of extracting energy from a quantum battery, applying a projective measurement on an auxiliary system. The battery is initially connected to the auxiliary system and allowed to interact with it. After some time, we execute a measu...
An entanglement-aware quantum computer simulation algorithm
M. Oliva·Jul 31, 2023
The advent of quantum computers promises exponential speed ups in the execution of various computational tasks. While their capabilities are hindered by quantum decoherence, they can be exactly simulated on classical hardware at the cost of an expone...
Simulating photon counting from dynamic quantum emitters by exploiting zero-photon measurements
S. Wein·Jul 31, 2023
Many applications of quantum optics demand delicate quantum properties of light carefully tailored to accomplish a specific task. To this end, numerical simulations of quantum light sources are vital for designing, characterizing, and optimizing quan...
Quantum simulation of Pauli channels and dynamical maps: Algorithm and implementation
Tomas Basile, C. Pineda·Jul 31, 2023
Pauli channels are fundamental in the context of quantum computing as they model the simplest kind of noise in quantum devices. We propose a quantum algorithm for simulating Pauli channels and extend it to encompass Pauli dynamical maps (parametrized...
Robust Estimation of the Quantum Fisher Information on a Quantum Processor
Vittorio Vitale, A. Rath, P. Jurcevic +3 more·Jul 31, 2023
We present the experimental measurement, on a quantum processor, of a series of polynomial lower bounds that to the quantum Fisher information (QFI), a fundamental quantity for certifying multipartite entanglement that is useful for metrological appl...
Toward Quantum Machine Translation of Syntactically Distinct Languages
M. Abbaszade, Mariam Zomorodi, V. Salari +1 more·Jul 31, 2023
The present study aims to explore the feasibility of language translation using quantum natural language processing algorithms on noisy intermediate-scale quantum (NISQ) devices. Classical methods in natural language processing (NLP) struggle with ha...
Quantum state tomography with locally purified density operators and local measurements
Yuchen Guo, Shuo Yang·Jul 31, 2023
Understanding quantum systems is of significant importance for assessing the performance of quantum hardware and software, as well as exploring quantum control and quantum sensing. An efficient representation of quantum states enables realizing quant...
Simulation of quantum computation with magic states via Jordan-Wigner transformations
Michael Zurel, Lawrence Z. Cohen, Robert Raussendorf·Jul 29, 2023
Negativity in certain quasiprobability representations is a necessary condition for a quantum computational advantage. Here we define a quasiprobability representation exhibiting this property with respect to quantum computations in the magic state m...
Logarithmic growth of peripheral entanglement concentrated via noisy measurements in a star network of spins
Jithin G. Krishnan, Harikrishnan K. J., Amit Kumar Pal·Jul 29, 2023
In a star-network of qubits interacting via Heisenberg interaction of XYZ-type, we demonstrate a logarithmic growth of the localizable bipartite peripheral entanglement with increasing periphery-size and vanishing xy-anisotropy. This feature disappea...
The Impact of Quantum Memory Quality on Entanglement Assisted Communication
Stephen Diadamo, Janis Noetzel·Jul 29, 2023
This work explores entanglement-assisted communication, where quantum entanglement resources enable the transmission of classical information at an enhanced rate. We consider a scenario where entanglement is distributed ahead of time based on network...
An SU(2)-symmetric Semidefinite Programming Hierarchy for Quantum Max Cut
Jun Takahashi, Chaithanya Rayudu, Cunlu Zhou +3 more·Jul 28, 2023
Understanding and approximating extremal energy states of local Hamiltonians is a central problem in quantum physics and complexity theory. Recent work has focused on developing approximation algorithms for local Hamiltonians, and in particular the `...
Nonlocal photonic quantum gates over 7.0 km
Xiao Liu, Xiao-Min Hu, Tian-Xiang Zhu +9 more·Jul 28, 2023
Quantum networks provide a prospective paradigm to connect separated quantum nodes, which relies on the distribution of long-distance entanglement and active feedforward control of qubits between remote nodes. Such approaches can be utilized to const...
Relaxations and Exact Solutions to Quantum Max Cut via the Algebraic Structure of Swap Operators
A. Watts, Anirban Narayan Chowdhury, Aidan Epperly +2 more·Jul 28, 2023
The Quantum Max Cut (QMC) problem has emerged as a test-problem for designing approximation algorithms for local Hamiltonian problems. In this paper we attack this problem using the algebraic structure of QMC, in particular the relationship between t...
QAOA with fewer qubits: a coupling framework to solve larger-scale Max-Cut problem
Yiren Lu, Guojing Tian, Xiaoming Sun·Jul 28, 2023
Maximum cut (Max-Cut) problem is one of the most important combinatorial optimization problems because of its various applications in real life, and recently Quantum Approximate Optimization Algorithm (QAOA) has been widely employed to solve it. Howe...
Quantum Kernel Estimation With Neutral Atoms For Supervised Classification: A Gate-Based Approach
M. Russo, Edoardo Giusto, B. Montrucchio·Jul 28, 2023
Quantum Kernel Estimation (QKE) is a technique based on leveraging a quantum computer to estimate a kernel function that is classically difficult to calculate, which is then used by a classical computer for training a Support Vector Machine (SVM). Gi...
Two-Qubit Gate Set Tomography with Fewer Circuits
K. Rudinger, Corey I. Ostrove, Stefan K. Seritan +4 more·Jul 28, 2023
Gate set tomography (GST) is a self-consistent and highly accurate method for the tomographic reconstruction of a quantum information processor's quantum logic operations, including gates, state preparations, and measurements. However, GST's experime...