Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Universal distributed blind quantum computing with solid-state qubits.
Yan-Cheng Wei, P. Stas, A. Suleymanzade +16 more·Dec 4, 2024
Blind quantum computing is a promising application of distributed quantum systems, in which a client can perform computations on a remote server without revealing any details of the applied circuit. Although the most promising realizations of quantum...
Pauli quantum computing: $I$ as $|0\rangle$ and $X$ as $|1\rangle$
Zhong-Xia Shang·Dec 4, 2024
We propose a new quantum computing formalism named Pauli quantum computing. In this formalism, we use the Pauli basis $I$ and $X$ on the non-diagonal blocks of density matrices to encode information and treat them as the computational basis $|0\rangl...
BOSS: Blocking algorithm for optimizing shuttling scheduling in Ion Trap
Xian Wu, Chenghong Zhu, Jingbo Wang +1 more·Dec 4, 2024
Ion traps stand at the forefront of quantum hardware technology, presenting unparalleled benefits for quantum computing, such as high-fidelity gates, extensive connectivity, and prolonged coherence times. In this context, we explore the critical role...
SymBreak: Mitigating Quantum Degeneracy Issues in QLDPC Code Decoders by Breaking Symmetry
Keyi Yin, Xiang Fang, Jixuan Ruan +7 more·Dec 3, 2024
Quantum error correction (QEC) is critical for scalable and reliable quantum computing, but existing solutions, such as surface codes, incur significant qubit overhead. Quantum low-density parity check (qLDPC) codes have recently emerged as a promisi...
Persistence of Entangled States and High Fidelity Quantum Gate Operations in Si/SiGe Spin Qubits at High Temperature
S. Amitonov, A. Aprà, M. Asker +20 more·Dec 2, 2024
We characterize single- and two-qubit operations in a SiGe quantum dot array, from the perspective of its quantum information processing capabilities. The analysis includes rigorous randomized benchmarking of single- and two-qubit gates, SPAM charact...
Simultaneously optimizing symmetry shifts and tensor factorizations for cost-efficient Fault-Tolerant Quantum Simulations of electronic Hamiltonians
Konrad Deka, Emil Zak·Dec 2, 2024
In fault-tolerant quantum computing, the cost of calculating Hamiltonian eigenvalues using the quantum phase estimation algorithm is proportional to the constant scaling the Hamiltonian matrix block-encoded in a unitary circuit. We present a method t...
Implementing semiclassical Szegedy walks in classical-quantum circuits for homomorphic encryption
S. A. Ortega, Pablo Fernández, M. Martin-Delgado·Dec 2, 2024
As cloud services continue to expand, the security of private data stored and processed in these environments has become paramount. This work delves into quantum homomorphic encryption (QHE), an emerging technology that facilitates secure computation...
Approximate Quantum Circuit Synthesis for Diagonal Unitary
Wenqi Zhang, Jinyang Liu, Zixiang Zhou +1 more·Dec 2, 2024
The quantum circuit synthesis problem bridges quantum algorithm design and quantum hardware implementation in the Noisy Intermediate-Scale Quantum (NISQ) era. In quantum circuit synthesis problems, diagonal unitary synthesis plays a crucial role due ...
Ptychographic estimation of pure multiqubit states in a quantum device
Warley M. S. Alves, L. Neves·Dec 1, 2024
Quantum ptychography is a method for estimating an unknown pure quantum state by subjecting it to overlapping projections, each one followed by a projective measurement on a single prescribed basis. Here, we present a comprehensive study of this meth...
Bringing Quantum Systems under Control: A Tutorial Invitation to Quantum Computing and Its Relation to Bilinear Control Systems
Julian Berberich, R. Kosut, Thomas Schulte-Herbrüggen·Dec 1, 2024
Quantum computing comes with the potential to push computational boundaries in various domains including, e.g., cryptography, simulation, optimization, and machine learning. Exploiting the principles of quantum mechanics, new algorithms can be develo...
It's Quick to be Square: Fast Quadratisation for Quantum Toolchains
Lukas Schmidbauer, Elisabeth Lobe, Ina Schaefer +1 more·Nov 29, 2024
Many of the envisioned use-cases for quantum computers involve optimisation processes. While there are many algorithmic primitives to perform the required calculations, all eventually lead to quantum gates operating on quantum bits, with an order as ...
Quantum computing architecture with trapped ion crystals and fast Rydberg gates
Han Bao, J. Vogel, U. Poschinger +1 more·Nov 29, 2024
Fast entangling gate operations are a fundamental prerequisite for quantum simulation and computation. We propose an entangling scheme for arbitrary pairs of ions in a linear crystal, harnessing the high electric polarizability of highly excited Rydb...
Parametrized multiqubit gate design for neutral-atom based quantum platforms
M. Mohan, Julius de Hond, S. Kokkelmans·Nov 29, 2024
A clever choice and design of gate sets can reduce the depth of a quantum circuit, and can improve the quality of the solution one obtains from a quantum algorithm. This is especially important for near-term quantum computers that suffer from various...
Universal approximation of continuous functions with minimal quantum circuits
Adrián Pérez-Salinas, Mahtab Yaghubi Rad, Alice Barthe +1 more·Nov 28, 2024
The conventional paradigm of quantum computing is discrete: it utilizes discrete sets of gates to realize bitstring-to-bitstring mappings, some of them arguably intractable for classical computers. In parameterized quantum approaches, the input becom...
A geometric invariant of linear rank-metric codes
Valentina Astore, Martino Borello, Marco Calderini +1 more·Nov 28, 2024
Rank-metric codes have been a central topic in coding theory due to their theoretical and practical significance, with applications in network coding, distributed storage, crisscross error correction, and post-quantum cryptography. Recent research ha...
Concurrent fermionic simulation gate
Zhongyi Jiang, M. H. Ansari·Nov 28, 2024
Introducing flexible native entanglement gates can significantly reduce circuit complexity. We propose a gate integrating i and operations within a single gate cycle. We theoretically show one possible realization of this gate for superconducting qub...
Leveraging Hardware Power through Optimal Pulse Profiling for Each Qubit Pair
Yuchen Zhu, Jinglei Cheng, Boxi Li +3 more·Nov 28, 2024
In the scaling development of quantum computers, the calibration process emerges as a critical challenge. Existing calibration methods, utilizing the same pulse waveform for two-qubit gates across the device, overlook hardware differences among physi...
Towards quantum error correction with two-body gates for quantum registers based on nitrogen-vacancy centers in diamond
Daniel Dulog, M. Plenio·Nov 27, 2024
Color centers in diamond provide a possible hardware for quantum computation, where the most basic quantum information processing unit are nitrogen-vacancy (NV) centers, each in contact with adjacent carbon nuclear spins. With specifically tailored d...
Generating non-Clifford gate operations through exact mapping between Majorana fermions and Z4 parafermions
Ali Hamed Safwan, R. W. Bomantara·Nov 27, 2024
Majorana fermions and their generalizations to Zn parafermions are considered promising building blocks of fault-tolerant quantum computers for their ability to encode quantum information nonlocally. In such topological quantum computers, highly robu...
Optimising Iteration Scheduling for Full-State Vector Simulation of Quantum Circuits on FPGAs
Youssef Moawad, Andrew Brown, René Steijl +1 more·Nov 27, 2024
As the field of quantum computing grows, novel algorithms which take advantage of quantum phenomena need to be developed. As we are currently in the NISQ (noisy intermediate scale quantum) era, quantum algorithm researchers cannot reliably test their...