Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,522 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
NEQRX: Efficient Quantum Image Encryption with Reduced Circuit Complexity
Rakesh Saini, B. K. Behera, S. Al-kuwari +1 more·Apr 14, 2022
Cryptography plays an important role in ensuring data security and authentication within information processing systems. As the prevalence of digital imagery continues to grow, safeguarding this form of data becomes increasingly crucial. However, exi...
Experimental quantum state discrimination using the optimal fixed rate of inconclusive outcomes strategy
Santiago G'omez, E. G'omez, O. Jim'enez +3 more·Apr 14, 2022
The problem of non-orthogonal state discrimination underlies crucial quantum information tasks, such as cryptography and computing protocols. Therefore, it is decisive to find optimal scenarios for discrimination among quantum states. We experimental...
Clifford Circuits can be Properly PAC Learned if and only if RP=NP
Daniel Liang·Apr 13, 2022
Given a dataset of input states, measurements, and probabilities, is it possible to efficiently predict the measurement probabilities associated with a quantum circuit? Recent work of Caro and Datta \cite{2020Caro} studied the problem of PAC learning...
Perfect Photon Indistinguishability from a Set of Dissipative Quantum Emitters
J. Guimbao, L. Sanchis, L. Weituschat +2 more·Apr 11, 2022
Single photon sources (SPS) based on semiconductor quantum dot (QD) platforms are restricted to low temperature (T) operation due to the presence of strong dephasing processes. Although the integration of QD in optical cavities provides an enhancemen...
The entropy cones of $W_N$ and $W_N^d$ states
H. Schnitzer·Apr 9, 2022
: The quantum entropy cones (QEC) for W N states of qubits and W dN states of qudits are computed. These cones emerge as symmetrized quantum entropy cones (SQEC) for arbitrary N and d . Directed graph models are presented which describe the SQEC for ...
Quantum Simulation for High-Energy Physics
Christian W. Bauer. Zohreh Davoudi, A. Balantekin, Tanmoy Bhattacharya +27 more·Apr 7, 2022
It is for the first time that Quantum Simulation for High Energy Physics (HEP) is studied in the U.S. decadal particle-physics community planning, and in fact until recently, this was not considered a mainstream topic in the community. This fact spea...
Robust Directional Couplers for State Manipulation in Silicon Photonic-Integrated Circuits
M. Katzman, Y. Piasetzky, Evyatar Rubin +5 more·Apr 7, 2022
Photonic integrated circuits play a central role in current and future applications such as communications, sensing, ranging, and information processing. Photonic quantum computing will also likely require an integrated optics architecture for improv...
Quantum-noise-limited microwave amplification using a graphene Josephson junction
Joydip Sarkar, K. Salunkhe, S. Mandal +7 more·Apr 5, 2022
Josephson junctions (JJs) and their tunable properties, including their nonlinearities, play an important role in superconducting qubits and amplifiers. JJs together with the circuit quantum electrodynamics architecture form many key components of qu...
How much classical information is carried by a quantum state? An approach inspired by Kolmogorov complexity
D. Brogioli·Apr 5, 2022
In quantum mechanics, a state is an element of a Hilbert space whose dimension exponentially grows with the increase of the number of par-ticles (or qubits, in quantum computing). The vague question “is this huge Hilbert space really there?” has been...
Superconducting Nanowire Single-Photon Detectors and effect of accumulation and unsteady releases of excess energy in materials
S. Pereverzev, G. Carosi, Viacheslav Li·Apr 5, 2022
Universal fault-tolerant quantum computers, which promise to revolutionize computing, are currently limited by excessive noise in their constituent superconducting qubits. Determining the dominant sources of this excess noise will lead to a clearer u...
A stochastic evaluation of quantum Fisher information matrix with generic Hamiltonians
Le Bin Ho·Apr 3, 2022
Quantum Fisher information matrix (QFIM) is a fundamental quantity in quantum physics, which closely links to diverse fields such as quantum metrology, phase transitions, entanglement witness, and quantum speed limit. It is crucial in quantum paramet...
Inverse design of high-dimensional quantum optical circuits in a complex medium
Suraj Goel, Saroch Leedumrongwatthanakun, N. H. Valencia +5 more·Apr 1, 2022
Programmable optical circuits are an important tool in developing quantum technologies such as transceivers for quantum communication and integrated photonic chips for quantum information processing. Maintaining precise control over every individual ...
Entanglement dynamics of noisy random circuits
Zhi Li, Shengqi Sang, T. Hsieh·Mar 30, 2022
The process by which open quantum systems thermalize with an environment is both of fun-damental interest and relevant to noisy quantum devices. As a minimal model of this process, we consider a qudit chain evolving under local random unitaries and l...
Adaptive Quantum State Tomography with Active Learning
Hannah Lange, Matjaž Kebrič, M. Buser +3 more·Mar 29, 2022
Recently, tremendous progress has been made in the field of quantum science and technologies: different platforms for quantum simulation as well as quantum computing, ranging from superconducting qubits to neutral atoms, are starting to reach unprece...
A Quantum Algorithm for Solving Eigenproblem of the Laplacian Matrix of a Fully Connected Weighted Graph
Hailing Liu, Lin-Chun Wan, Chao-Hua Yu +4 more·Mar 28, 2022
Solving eigenproblem of the Laplacian matrix of a fully connected weighted graph has wide applications in data science, machine learning, and image processing, etc. However, this is very challenging because it involves expensive matrix operations. He...
Observing and braiding topological Majorana modes on programmable quantum simulators
N. Harle, O. Shtanko, R. Movassagh·Mar 28, 2022
Electrons are indivisible elementary particles, yet paradoxically a collection of them can act as a fraction of a single electron, exhibiting exotic and useful properties. One such collective excitation, known as a topological Majorana mode, is natur...
Multiqubit Toffoli Gates and Optimal Geometry with Rydberg Atoms
Dongmin Yu, Han Wang, Jin-ming Liu +3 more·Mar 27, 2022
Due to its potential for implementing a scalable quantum computer, multiqubit Toffoli gate lies in the heart of quantum information processing. In this article, we demonstrate a multiqubit blockade gate with atoms arranged in a three-dimension sphero...
New Quantum Algorithms for Computing Quantum Entropies and Distances
Qisheng Wang, J. Guan, Junyi Liu +2 more·Mar 25, 2022
We propose a series of quantum algorithms for computing a wide range of quantum entropies and distances, including the von Neumann entropy, quantum Rényi entropy, trace distance, and fidelity. The proposed algorithms significantly outperform the prio...
Compositional optimization of quantum circuits for quantum kernels of support vector machines
E. Torabian, R. Krems·Mar 25, 2022
While quantum machine learning (ML) has been proposed to be one of the most promising applications of quantum computing, how to build quantum ML models that outperform classical ML remains a major open question. Here, we demonstrate a Bayesian algori...
Encoding quantum bits in bound electronic states of a graphene nanotorus
J. Furtado, A. Ramos, J. E. G. Silva +2 more·Mar 24, 2022
We propose to use the quantum states of an electron trapped on the inner surface of a graphene nanotorus to realize as a new kind of physical quantum bit, which can be used to encode quantum information. Fundamental tasks for quantum information proc...