Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,406 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Dynamics of symmetry-protected topological matter on a quantum computer
Miguel Mercado, Kyle Y. Chen, P. Darekar +3 more·Feb 20, 2024
Control of topological edge modes is desirable for encoding quantum information resiliently against external noise. Their implementation on quantum hardware, however, remains a long-standing problem due to current limitations of circuit depth and noi...
Measurement-induced phase transitions by matrix product states scaling
Guillaume Cecile, Hugo Lóio, J. De Nardis·Feb 20, 2024
We study the time evolution of long quantum spin chains subjected to continuous monitoring projected on matrix product states (MPS) with fixed bond dimension, by means of the Time-Dependent Variational Principle (TDVP) algorithm. The latter gives an ...
Quantum sensing of antiferromagnetic magnon two-mode squeezed vacuum
Anna-Luisa E. Römling, Akashdeep Kamra·Feb 20, 2024
N\'eel ordered antiferromagnets exhibit two-mode squeezing such that their ground state is a nonclassical superposition of magnon Fock states. Here we theoretically demonstrate that antiferromagnets can couple to spin qubits via direct dispersive int...
The construction of multiqubit unextendible product bases
Caohan Cheng, Lin Chen·Feb 19, 2024
The unextendible orthogonal matrices (UPBs) can be used for various problems in quantum information. We provide an algorithm to check if two UPBs are non-equivalent to each other. We give a method to construct UPBs and we apply this method to find al...
Towards Early Fault Tolerance on a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mn>2</mml:mn><mml:mo>×</mml:mo><mml:mi>N</mml:mi></mml:math> Array of Qubits Equipped with Shuttling
A. Siegel, Armands Strikis, M. Fogarty·Feb 19, 2024
It is well understood that a two-dimensional grid of locally interacting qubits is a promising platform for achieving fault-tolerant quantum computing. However in the near future, it may prove less challenging to develop lower-dimensional structures....
Quantum Soft Covering with Relative Entropy Criterion
Xingyi He, S. Sandeep Pradhan·Feb 16, 2024
In this work, we propose a soft covering problem for fully quantum channels using relative entropy as a criterion for operator closeness. We establish covering lemmas by deriving one-shot bounds on the achievable rates in terms of smooth min-entropie...
Leveraging junk information to enhance the quantum error mitigation
Ruixia Wang, Xiaosi Xu, F. Yan +4 more·Feb 16, 2024
Noise in quantum information processing poses a significant obstacle to achieving precise results. Quantum error mitigation techniques are crucial for improving the accuracy of experimental expectation values in this process. In the experiments, it i...
Noncollinear first-principles studies of the spin-electric coupling in frustrated triangular molecular magnets
M. F. Islam, K. Withanage, C. M. Canali +1 more·Feb 16, 2024
Frustrated triangular molecular magnets (MMs) with anti-ferromagnetic ground states (GS) are an important class of magnetic systems with potential applications in quantum information processing. The two-fold degenerate GS of these molecules, characte...
Universal Quantum Computing with Field-Mediated Unruh--DeWitt Qubits
Eric W. Aspling, Michael J. Lawler·Feb 15, 2024
A set of universal quantum gates is a vital part of the theory of quantum computing, but is absent in the developing theory of Relativistic Quantum Information (RQI). Yet, the Unruh--DeWitt (UDW) detector formalism can be elevated to unitary gates be...
Quantum Automating TC0-Frege Is LWE-Hard
Noel Arteche, Gaia Carenini, Matthew Gray·Feb 15, 2024
We prove the first hardness results against efficient proof search by quantum algorithms. We show that under Learning with Errors (LWE), the standard lattice-based cryptographic assumption, no quantum algorithm can weakly automate TC0\documentclass[1...
Superconducting quantum memory with a suspended coaxial resonator
Lev Krayzman, C. Lei, S. Ganjam +3 more·Feb 14, 2024
A promising way to store quantum information is by encoding it in the bosonic excitations of microwave resonators. This provides for long coherence times, low dephasing rates, as well as a hardware-efficient approach to quantum error correction. Ther...
Replica topological order in quantum mixed states and quantum error correction
Zhuan Li, Roger S. K. Mong·Feb 14, 2024
Topological phases of matter offer a promising platform for quantum computation and quantum error correction. Nevertheless, unlike its counterpart in pure states, descriptions of topological order in mixed states remain relatively under-explored. Our...
Error correction of parity-encoding-based annealing through post-readout decoding
Yoshihiro Nambu·Feb 13, 2024
Lechner, Hauke, and Zoller proposed a parity-encoded spin-embedding scheme for quantum annealing (QA) with all-to-all connectivity to avoid the issue of limited connectivity in near-term QA hardware and to enable the implementation thereof using only...
Blueprint for efficient nuclear spin characterization with color center
Majid Zahedian, V. Vorobyov, Jörg Wrachtrup·Feb 12, 2024
Nuclear spins in solids offer a promising avenue for developing scalable quantum hardware. Leveraging nearby single-color centers, these spins can be efficiently addressed at the single-site level through spin resonance. However, characterising indiv...
Nonassociative Geometric and Quantum Information Flows and R‐Flux Deformations of Wormhole Solutions in String Gravity
Laurenţiu Bubuianu, Douglas Singleton, S. Vacaru +1 more·Feb 11, 2024
This article consists of an introduction to the theory of nonassociative geometric classical and quantum information flows defined by star products with R‐flux deformations in string gravity. Corresponding nonassociative generalizations of the concep...
Full Quantum Process Tomography of a Universal Entangling Gate on an IBM’s Quantum Computer
M. AbuGhanem·Feb 10, 2024
Characterizing quantum dynamics is critical in quantum physics, quantum information science, and computation, where the precision of quantum gates plays a key role. We present a comprehensive experimental analysis of the SQSCZ gate–a novel universal ...
qec_code_sim: An open-source Python framework for estimating the effectiveness of quantum-error correcting codes on superconducting qubits
Santiago López, Jonathan Andrade Plascencia, G. Perdue·Feb 9, 2024
Quantum computers are highly susceptible to errors due to unintended interactions with their environment. It is crucial to correct these errors without gaining information about the quantum state, which would result in its destruction through back-ac...
Barycentric and pairwise Rényi quantum leakage with application to privacy-utility trade-off
Farhad Farokhi·Feb 9, 2024
Barycentric and pairwise quantum Rényi leakages are proposed as two measures of information leakage for privacy and security analysis in quantum computing and communication systems. These quantities both require minimal assumptions on the eavesdroppe...
Safeguarding Oscillators and Qudits with Distributed Two-Mode Squeezing
Anthony J. Brady, Jing Wu, Quntao Zhuang·Feb 8, 2024
Recent advancements in multi-mode Gottesman-Kitaev-Preskill (GKP) codes have shown great promise in enhancing the protection of both discrete and analog quantum information. This broadened range of protection brings opportunities beyond quantum compu...
Using Bifluxon Tunneling to Protect the Fluxonium Qubit
Waël Ardati, S'ebastien L'eger, Shelender Kumar +8 more·Feb 7, 2024
Encoding quantum information in quantum states with disjoint wave-function support and noise-insensitive energies is the key behind the idea of qubit protection. While fully protected qubits are expected to offer exponential protection against both e...