Quantum Brain

Papers

Live trends in quantum computing research, updated daily from arXiv.

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13,351 papers in 12 months (+7% vs prior quarter)

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5,268 papers found

Reinforcement Learning to Disentangle Multiqubit Quantum States from Partial Observations

Pavel Tashev, Stefan Petrov, Friederike Metz +1 more·Jun 12, 2024

Using partial knowledge of a quantum state to control multiqubit entanglement is a largely unexplored paradigm in the emerging field of quantum interactive dynamics with the potential to address outstanding challenges in quantum state preparation and...

PhysicsComputer Science

Improved criteria of detecting multipartite entanglement structure

Kai Wu, Zhihua Chen, Zhen-Peng Xu +2 more·Jun 11, 2024

Multipartite entanglement is one of the crucial resources in quantum information processing tasks such as quantum metrology, quantum computing and quantum communications. It is essential to verify not only the multipartite entanglement, but also the ...

Physics

Quantum sparse coding and decoding based on quantum network

Xun Ji, Qin Liu, Shan Huang +2 more·Jun 10, 2024

Sparse coding provides a versatile framework for efficiently capturing and representing crucial data (information) concisely, which plays an essential role in various computer science fields, including data compression, feature extraction, and genera...

Physics

Reliable Quantum Memories with Unreliable Components

A. K. Nayak, Eric Chitambar, L. Varshney·Jun 8, 2024

Quantum memory systems are vital in quantum information processing for dependable storage and retrieval of quantum states. Inspired by classical reliability theories that synthesize reliable computing systems from unreliable components, we formalize ...

PhysicsComputer ScienceMathematics

Bipartite reweight-annealing algorithm of quantum Monte Carlo to extract large-scale data of entanglement entropy and its derivative

Zhe Wang, Zhiyan Wang, Yi-Ming Ding +2 more·Jun 8, 2024

Entanglement entropy (EE) plays a central role in the intersection of quantum information science and condensed matter physics. However, scanning the EE for two-dimensional and higher-dimensional systems still remains challenging. To address this cha...

PhysicsMedicine

Slow and stored light via electromagnetically induced transparency using a Λ -type superconducting artificial atom

Kai-I Chu, Xiao-Cheng Lu, K-H Chiang +5 more·Jun 7, 2024

Recent progresses in Josephson-junction-based superconducting circuits have propelled quantum information processing forward. However, the lack of a metastable state in most superconducting artificial atoms hinders the development of photonic quantum...

Physics

Entanglement with neutral atoms in the simulation of nonequilibrium dynamics of one-dimensional spin models

Anupam Mitra·Jun 7, 2024

Quantum entanglement is a key ingredient for quantum information processing with capabilities beyond that of classical computation. We study the generation and role of entanglement in the dynamics of spin-1/2 models, both for the design of quantum ga...

Physics

Quantum Nuclear Dynamics on a Distributed Set of Ion-Trap Quantum Computing Systems.

Anurag Dwivedi, A. Rasmusson, Philip Richerme +1 more·Jun 7, 2024

Quantum nuclear dynamics with wavepacket time evolution is classically intractable and viewed as a promising avenue for quantum information processing. Here, we use IonQ, Inc.'s 11-qubit trapped-ion quantum computer, Harmony, to study the quantum wav...

MedicinePhysics

High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers

T. Joas, F. Ferlemann, Roberto Sailer +9 more·Jun 6, 2024

Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vaca...

Physics

Circuit-level fault tolerance of cat codes

Long D. H. My, Shu-Fen Qin, Hui Khoon Ng·Jun 6, 2024

Bosonic codes encode quantum information into a single infinite-dimensional physical system endowed with error correction capabilities. This reduces the need for complex management of many physical constituents compared with standard approaches emplo...

Computer SciencePhysics

A quantum neural network-based approach to power quality disturbances detection and recognition

Guo-Dong Li, Haibin He, Yue Li +4 more·Jun 5, 2024

As an emerging technology force, quantum algorithms have shown great potential and unique advantages in many fields of application. Power quality disturbances (PQDs) affect the security and stability of the power system, which may lead to equipment d...

Physics

Optimization of Decoder Priors for Accurate Quantum Error Correction.

V. Sivak, M. Newman, P. Klimov·Jun 4, 2024

Accurate decoding of quantum error-correcting codes is a crucial ingredient in protecting quantum information from decoherence. It requires characterizing the error channels corrupting the logical quantum state and providing this information as a pri...

PhysicsMedicine

Demonstration of Erasure Conversion in a Molecular Tweezer Array

Connor M. Holland, Yukai Lu, Samuel J. Li +2 more·Jun 4, 2024

Programmable optical tweezer arrays of molecules are an emerging platform for quantum simulation and quantum information science. For these applications, reducing and mitigating errors that arise during initial state preparation and subsequent evolut...

Physics

Entangling Four Logical Qubits beyond Break-Even in a Nonlocal Code.

Yifan Hong, Elijah Durso-Sabina, D. Hayes +1 more·Jun 4, 2024

Quantum error correction protects logical quantum information against environmental decoherence by encoding logical qubits into entangled states of physical qubits. One of the most important near-term challenges in building a scalable quantum compute...

MedicinePhysics

Noise-adapted qudit codes for amplitude-damping noise

Sourav Dutta, Debjyoti Biswas, Prabha Mandayam·Jun 4, 2024

Quantum error correction (QEC) plays a critical role in preventing information loss in quantum systems and provides a framework for reliable quantum computation. Identifying quantum codes with nice code parameters for physically motivated noise model...

Physics

Generalized Cycle Benchmarking Algorithm for Characterizing Midcircuit Measurements

Zhihan Zhang, Senrui Chen, Yunchao Liu +1 more·Jun 4, 2024

Midcircuit measurements (MCMs) are crucial ingredients in the development of fault-tolerant quantum computation. While there have been rapid experimental progresses in realizing MCMs, a systematic method for characterizing noisy MCMs is still under e...

Physics

Emergence of the Wavefunction of a Non-relativistic Quantum Particle from QFT

Mani L. Bhaumik·Jun 4, 2024

The enormous success of the Standard Model of particle physics has clearly established quantum fields as the fundamental elements of reality of the universe unveiled to us so far. Here we present for the first time a thorough derivation of the wavefu...

Physics

Entanglement accelerates quantum simulation

Qi Zhao, You Zhou, Andrew M. Childs·Jun 4, 2024

Quantum entanglement is an essential feature of many-body systems that impacts both quantum information processing and fundamental physics. Classical simulation methods can efficiently simulate many-body states with low entanglement, but struggle as ...

Physics

Resource-theoretic hierarchy of contextuality for general probabilistic theories

Lorenzo Catani, Thomas D. Galley, Tomáš Gonda·Jun 2, 2024

In this work we present a hierarchy of generalized contextuality. It refines the traditional binary distinction between contextual and noncontextual theories, and facilitates their comparison based on how contextual they are. Our approach focuses on ...

Quantum Physics

A Novel Quantum-Classical Hybrid Algorithm for Determining Eigenstate Energies in Quantum Systems

Qing-Xing Xie, Yan Zhao·Jun 1, 2024

Developing efficient quantum computing algorithms is essential for tackling computationally challenging problems across various fields. This paper presents a novel quantum algorithm, XZ24, for efficiently computing the eigen-energy spectra of arbitra...

Physics
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