Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
High-fidelity transmon coupler activated CCZ gate on fluxonium qubits
I. A. Simakov, G. S. Mazhorin, I. N. Moskalenko +2 more·Aug 29, 2023
The Toffoli gate takes a special place in the quantum information theory. It opens up a path for efficient implementation of complex quantum algorithms. Despite tremendous progress of the quantum processors based on the superconducting qubits, realiz...
Efficient digitized counterdiabatic quantum optimization algorithm within the impulse regime for portfolio optimization
Alejandro Gomez Cadavid, I. Montalban, Archismita Dalal +2 more·Aug 29, 2023
We propose a faster digital quantum algorithm for portfolio optimization using the digitized-counterdiabatic quantum optimization (DCQO) paradigm in the impulse regime, that is, where the counterdiabatic terms are dominant. Our approach notably reduc...
Universal quantum computation using atoms in cross-cavity systems
Luiz O. R. Solak, D. Z. Rossatto, C. Villas-Bôas·Aug 28, 2023
Quantum gates are the building blocks of quantum circuits, which in turn are the cornerstones of quantum information processing. In this work, we theoretically investigate a single-step implementation of both a universal two- (CNOT) and three-qubit (...
Quantum Computing for Solid Mechanics and Structural Engineering - a Demonstration with Variational Quantum Eigensolver
Yunya Liu, Jiakun Liu, J. Raney +1 more·Aug 28, 2023
Variational quantum algorithms exploit the features of superposition and entanglement to optimize a cost function efficiently by manipulating the quantum states. They are suitable for noisy intermediate-scale quantum (NISQ) computers that recently be...
Scalable Algorithms for Power Function Calculations of quantum states in NISQ Era
Wen-jian Zhao, Tingting Chen, Ru Yang·Aug 28, 2023
This article focuses on the development of scalable and quantum bit-efficient algorithms for computing power functions of random quantum states. Two algorithms, based on Hadamard testing and Gate Set Tomography, are proposed. We provide a comparative...
Fast generation of Schrödinger cat states using a Kerr-tunable superconducting resonator
X. He, Yong Lu, D. Bao +7 more·Aug 28, 2023
Schrödinger cat states, quantum superpositions of macroscopically distinct classical states, are an important resource for quantum communication, quantum metrology and quantum computation. Especially, cat states in a phase space protected against pha...
A cost-efficient quantum access network with qubit-based synchronization
C. Huang, Yen-Jie chen, T. Luo +4 more·Aug 28, 2023
Quantum key distribution (QKD) is a physical layer encryption technique that enables two distant parties to exchange secure keys with information-theoretic security. In the last two decades, QKD has transitioned from laboratory research to real-world...
Heralding entangled optical photons from a microwave quantum processor
T. H. Haug, A. F. Kockum, R. Van Laer·Aug 27, 2023
Exploiting the strengths of different quantum hardware components may increase the capabilities of emerging quantum processors. Here we propose and analyze a quantum architecture that leverages the nonlocal connectivity of optics, along with the exqu...
Random projection using random quantum circuits
Keerthi Kumaran, M. Sajjan, Sangchul Oh +1 more·Aug 26, 2023
The random sampling task performed by Google's Sycamore processor gave us a glimpse of the"Quantum Supremacy era". This has definitely shed some spotlight on the power of random quantum circuits in this abstract task of sampling outputs from the (pse...
Classical variational optimization of a PREPARE circuit for quantum phase estimation of quantum chemistry Hamiltonians
Hayata Morisaki, K. Mitarai, K. Fujii +1 more·Aug 26, 2023
We propose a method for constructing circuits for quantum phase estimation of a molecular Hamiltonian in quantum chemistry by using variational optimization of quantum circuits solely on classical computers. The circuit generates a quantum state whic...
Quantum-Informed Recursive Optimization Algorithms
Jernej Rudi Finžgar, Aron Kerschbaumer, M. Schuetz +2 more·Aug 25, 2023
We propose and implement a family of quantum-informed recursive optimization (QIRO) algorithms for combinatorial optimization problems. Our approach leverages quantum resources to obtain information that is used in problem-specific classical reductio...
Multipartite Entanglement Distribution in Quantum Networks using Subgraph Complementations
Aniruddha Sen, K. Goodenough, Donald F. Towsley·Aug 25, 2023
Quantum networks are important for quantum communication, enabling tasks such as quantum teleportation, quantum key distribution, quantum sensing, and quantum error correction, often utilizing graph states, a specific class of multipartite entangled ...
Observation of multiple steady states with engineered dissipation
Li Li, Tong Liu, Xue-yi Guo +9 more·Aug 25, 2023
Simulating the dynamics of open quantum systems is essential in achieving practical quantum computation and understanding novel nonequilibrium behaviors. However, quantum simulation of a many-body system coupled to an engineered reservoir has yet to ...
The Potential of Quantum Techniques for Stock Price Prediction
Naman Srivastava, Gaurang Belekar, Neel Shahakar +1 more·Aug 25, 2023
We explored the potential applications of various Quantum Algorithms for stock price prediction by conducting a series of experimental simulations using both Classical as well as Quantum Hardware. Firstly, we extracted various stock price indicators,...
Parallel-in-time quantum simulation via Page and Wootters quantum time
N. Diaz, Paolo Braccia, Martín Larocca +3 more·Aug 24, 2023
In the past few decades, researchers have created a veritable zoo of quantum algorithms by drawing inspiration from classical computing, information theory, and even from physical phenomena. Here, we present quantum algorithms for parallel-in-time si...
Efficient Long-Range Entanglement Using Dynamic Circuits
Elisa Baumer, Vinay Tripathi, Derek S. Wang +5 more·Aug 24, 2023
Quantum simulation traditionally relies on unitary dynamics, inherently imposing efficiency constraints on the generation of intricate entangled states. In principle, these limitations can be superseded by nonunitary, dynamic circuits. These circuits...
On the Study of Partial Qubit Hamiltonian for Efficient Molecular Simulation Using Variational Quantum Eigensolvers
Harshdeep Singh, Sabyashachi Mishra, S. Majumder·Aug 24, 2023
Quantum computing is being extensively used in quantum chemistry, especially in simulating simple molecules and evaluating properties like the ground state energy, dipole moment, etc. The transformation of a molecular Hamiltonian from the fermionic s...
Practical limitations on robustness and scalability of quantum Internet
A. Sadhu, Meghana Ayyala Somayajula, K. Horodecki +1 more·Aug 24, 2023
As quantum theory allows for information processing and computing tasks that otherwise are not possible with classical systems, there is a need and use of quantum Internet beyond existing network systems. At the same time, the realization of a desira...
Quantum state tomography of photon's polarization and path degrees of freedom
J. L. Ferreira, B. L. Bernardo·Aug 24, 2023
Quantum state tomography (QST), the process through which the density matrix of a quantum system is characterized from measurements of specific observables, is a fundamental pillar in the fields of quantum information and computation. In this work, w...
Digital-analog quantum computing of fermion-boson models in superconducting circuits
Shubham Kumar, N. N. Hegade, A. Visuri +5 more·Aug 23, 2023
High-fidelity quantum simulations demand hardware-software co-design architectures, which are crucial for adapting to complex problems such as strongly correlated dynamics in condensed matter. By leveraging co-design strategies, we can enhance the pe...