Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Online Detection of Golden Circuit Cutting Points
Daniel T. Chen, Ethan H. Hansen, Xinpeng Li +7 more·Aug 20, 2023
Quantum circuit cutting has emerged as a promising method for simulating large quantum circuits using a collection of small quantum machines. Running low-qubit circuit “fragments” not only overcomes the size limitation of near-term hardware, but it a...
Forward and Backward Constrained Bisimulations for Quantum Circuits Using Decision Diagrams
Lukas Burgholzer, A. Jiménez-Pastor, Kim G. Larsen +3 more·Aug 18, 2023
Efficient methods for the simulation of quantum circuits on classical computers are crucial for their analysis due to the exponential growth of the problem size with the number of qubits. Here we study lumping methods based on bisimulation, an establ...
Quantum and Probabilistic Computers Rigorously Powerful than Traditional Computers, and Derandomization
Tianrong Lin·Aug 18, 2023
In this paper, we extend the techniques used in our previous work to show that there exists a probabilistic Turing machine running within time $O(n^k)$ for all $k\in\mathbb{N}_1$ accepting a language $L_d$ that is different from any language in $\mat...
Optimal Partitioning of Quantum Circuits Using Gate Cuts and Wire Cuts
Sebastian Brandhofer, I. Polian, Kevin Krsulich·Aug 18, 2023
A limited number of qubits, high error rates, and limited qubit connectivity are major challenges for effective near-term quantum computations. Quantum circuit partitioning divides a quantum computation into classical postprocessing steps and a set o...
Exploiting the Quantum Advantage for Satellite Image Processing: Review and Assessment
Soronzonbold Otgonbaatar, Dieter Kranzlmüller·Aug 18, 2023
This article examines the current status of quantum computing (QC) in Earth observation and satellite imagery. We analyze the potential limitations and applications of quantum learning models when dealing with satellite data, considering the persiste...
Design and execution of quantum circuits using tens of superconducting qubits and thousands of gates for dense Ising optimization problems
Filip B. Maciejewski, Stuart Hadfield, Benjamin C. Hall +13 more·Aug 18, 2023
We develop a hardware-efficient ansatz for variational optimization, derived from existing ansatze in the literature, that parametrizes subsets of all interactions in the Cost Hamiltonian in each layer. We treat gate orderings as a variational parame...
Long-Lived Quantum Memory Enabling Atom-Photon Entanglement over 101 km of Telecom Fiber
Yiru Zhou, Pooja Malik, Florian Fertig +6 more·Aug 17, 2023
Long-distance entanglement distribution is the key task for quantum networks, enabling applications such as secure communication and distributed quantum computing. Here we report on novel developments extending the reach for sharing entanglement betw...
Protocol for nearly deterministic parity projection on two photonic qubits
Chenxu Liu, R. Frantzeskakis, S. Economou +1 more·Aug 17, 2023
Photonic parity projection plays an important role in photonic quantum information processing. Nondestructive parity projections normally require high-fidelity controlled-Z gates between photonic and matter qubits, which can be experimentally demandi...
Near-Minimal Gate Set Tomography Experiment Designs
Corey I. Ostrove, K. Rudinger, Stefan K. Seritan +2 more·Aug 17, 2023
Gate set tomography (GST) is a technique for self-consistently and precisely estimating the entire gate set of a quantum processor. GST carries nontrivial experimental cost, and as such the use of GST in practice has so far been limited to characteri...
A Bottom-up Approach to Constructing Symmetric Variational Quantum Circuits
Babatunde M. Ayeni·Aug 17, 2023
In the age of noisy quantum processors, the exploitation of quantum symmetries can be quite beneficial in the efficient preparation of trial states, an important part of the variational quantum eigensolver algorithm. The benefits include building qua...
Constant-depth circuits for Boolean functions and quantum memory devices using multi-qubit gates
J. Allcock, Jing Bao, J. F. Doriguello +2 more·Aug 16, 2023
<jats:p>We explore the power of the unbounded Fan-Out gate and the Global Tunable gates generated by Ising-type Hamiltonians in constructing constant-depth quantum circuits, with particular attention to quantum memory devices. We propose two types of...
Constant-overhead fault-tolerant quantum computation with reconfigurable atom arrays
Qiang-Da Xu, J. P. Bonilla Ataides, C. Pattison +7 more·Aug 16, 2023
Quantum low-density parity-check (qLDPC) codes can achieve high encoding rates and good code distance scaling, potentially enabling low-overhead fault-tolerant quantum computing. However, implementing qLDPC codes involves nonlocal operations that req...
Efficient simulation of leakage errors in quantum error correcting codes using tensor network methods
Hidetaka Manabe, Yasunari Suzuki, A. Darmawan·Aug 16, 2023
Leakage errors, in which a qubit is excited to a level outside the qubit subspace, represent a significant obstacle in the development of robust quantum computers. We present a computationally efficient simulation methodology for studying leakage err...
q-analog qudit Dicke states
D. Raveh, Rafael I. Nepomechie·Aug 16, 2023
Dicke states are completely symmetric states of multiple qubits (2-level systems), and qudit Dicke states are their d-level generalization. We define here q-deformed qudit Dicke states using the quantum algebra suq(d) . We show that these states can ...
Quaternary Neural Belief Propagation Decoding of Quantum LDPC Codes With Overcomplete Check Matrices
Sisi Miao, A. Schnerring, Haizheng Li +1 more·Aug 16, 2023
Quantum low-density parity-check (QLDPC) codes are promising candidates for error correction in quantum computers. One of the major challenges in implementing QLDPC codes in quantum computers is the lack of a universal decoder. In this work, we first...
Quantum-enhanced policy iteration on the example of a mountain car
Egor E. Nuzhin, D. Yudin·Aug 16, 2023
Advances in the experimental demonstration of quantum processors have provoked a surge of interest to the idea of practical implementation of quantum computing over last years. It is expected that the use of quantum algorithms will significantly spee...
Autonomous Stabilization of Fock States in an Oscillator against Multiphoton Losses.
Sai Li, Zhongchu Ni, Libo Zhang +8 more·Aug 16, 2023
Fock states with a well-defined number of photons in an oscillator have shown a wide range of applications in quantum information science. Nonetheless, their usefulness has been marred by single and multiphoton losses due to unavoidable environment-i...
Structured beam controlled super-resolution in quantum dots via rapid adiabatic passage
Partha Das, Samit Kumar Hazra, Tarak Nath Dey·Aug 15, 2023
We theoretically investigate rapid adiabatic passage (RAP) based super-resolution microscopy in a two-level quantum dot (QD) system. The system consists of a QD interacting with two structured beams, accompanied by chirping and a time delay. The cent...
Universal quantum computing based on magnetic domain wall qubits
Shuang Li, Xichao Zhang, M. Ezawa +1 more·Aug 15, 2023
Quantum computers allow to solve efficiently certain problems that are intractable for classical computers. For the realization of a quantum computer, a qubit design as the basic building block is a nontrivial starting point. We propose the utilizati...
Entanglement, Quantum Correlators, and Connectivity in Graph States
Arthur Vesperini, R. Franzosi·Aug 15, 2023
This work presents a comprehensive exploration of the entanglement and graph connectivity properties of Graph States (GSs). Qubit entanglement in Pseudo Graph States (PGSs) is quantified using the Entanglement Distance (ED), a recently introduced mea...