Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
AI-Enabled Parallel Assembly of Thousands of Defect-Free Neutral Atom Arrays.
Rui Lin, Han-Sen Zhong, You Li +15 more·Dec 19, 2024
Assembling increasingly larger-scale defect-free optical-tweezer-trapped atom arrays is essential for quantum computation and quantum simulations based on atoms. Here, we propose an AI-enabled, rapid, constant-time-overhead rearrangement protocol, an...
Quantum computing in spin-adapted representations for efficient simulations of spin systems
Anthony Gandon, Alberto Baiardi, Max Rossmannek +2 more·Dec 19, 2024
Exploiting inherent symmetries is a common and effective approach to speed up the simulation of quantum systems. However, efficiently accounting for non-Abelian symmetries, such as the $SU(2)$ total-spin symmetry, remains a major challenge. In fact, ...
Eigenstate Preparation on Quantum Computers
J. Bonitati·Dec 19, 2024
This thesis investigates quantum algorithms for eigenstate preparation, with a focus on solving eigenvalue problems such as the Schrodinger equation by utilizing near-term quantum computing devices. These problems are ubiquitous in several scientific...
Optimizing FTQC Programs through QEC Transpiler and Architecture Codesign
Meng Wang, Chenxu Liu, S. Stein +4 more·Dec 19, 2024
Fault-tolerant quantum computing (FTQC) is essential for executing reliable quantum computations of meaningful scale. Widely adopted QEC codes for FTQC, such as the surface code and color codes, utilize Clifford+T gate sets, where T gates are general...
Short two-qubit pulse sequences for exchange-only spin qubits in 2D layouts
Jason Chadwick, G. Guerreschi, F. Luthi +8 more·Dec 19, 2024
Exchange-only (EO) spin qubits in quantum dots offer an expansive design landscape for architecting scalable device layouts. The study of two-EO-qubit operations, which involve six electrons in six quantum dots, has so far been limited to a small num...
A brief history of quantum vs classical computational advantage
Ryan LaRose·Dec 19, 2024
In this review article we summarize all experiments claiming quantum computational advantage to date. Our review highlights challenges, loopholes, and refutations appearing in subsequent work to provide a complete picture of the current statuses of t...
A correspondence between quantum error correcting codes and quantum reference frames
Sylvain Carrozza, A. Chatwin-Davies, Philipp A. Hoehn +1 more·Dec 19, 2024
In a gauge theory, a collection of kinematical degrees of freedom is used to redundantly describe a smaller amount of gauge-invariant information. In a quantum error correcting code (QECC), a collection of computational degrees of freedom that make u...
Universal Quantum Computation via Scalable Measurement-Free Error Correction
Stefano Veroni, A. Paler, G. Giudice·Dec 19, 2024
We show that universal quantum computation can be concretely made fault-tolerant without mid-circuit measurements. To this end, we introduce a measurement-free deformation protocol of the Bacon-Shor code to realize a logical gate. Combined with a f...
Quantum circuit synthesis with SQiSW
Jialiang Tang, Jialin Zhang, Xiaoming Sun·Dec 19, 2024
The primary objective of quantum circuit synthesis is to efficiently and accurately realize specific quantum algorithms or operations utilizing a predefined set of quantum gates, while also optimizing the circuit size. It holds a pivotal position in ...
Gaussian boson sampling for binary optimization
Jean Cazalis, Tirth Shah, Yahui Chai +2 more·Dec 19, 2024
Binary optimization is a fundamental area in computational science, with wide-ranging applications from logistics to cryptography, where the tasks are often formulated as Quadratic or Polynomial Unconstrained Binary Optimization problems (QUBO/PUBO)....
A Shapley Value Estimation Speedup for Efficient Explainable Quantum AI
Iain Burge, Michel Barbeau, Joaquín García·Dec 19, 2024
This work focuses on developing efficient post-hoc explanations for quantum AI algorithms. In classical contexts, the cooperative game theory concept of the Shapley value adapts naturally to post-hoc explanations, where it can be used to identify whi...
Peer-to-Peer Distribution of Graph States Across Spacetime Quantum Networks of Arbitrary Topology
Yuexun Huang, Xiangyu Ren, Bikun Li +3 more·Dec 19, 2024
Graph states are a class of important multiparty entangled quantum states, of which Bell pairs are the special case. Realizing a robust and fast distribution of arbitrary graph states in the downstream layer of the quantum network is essential for en...
Quantum expectation value estimation by doubling the number of qubits
Hiroshi Yano, M. Kohda, Shoichiro Tsutsui +4 more·Dec 19, 2024
Expectation value estimation is ubiquitous in quantum algorithms. The expectation value of a Hamiltonian, which is essential in various practical applications, is often estimated by measuring a large number of Pauli strings on quantum computers and p...
Quantum Homogenization as a Quantum Steady State Protocol on NISQ Hardware
Alexander Y. Yosifov, Aditya Iyer, Daniel Ebler +1 more·Dec 19, 2024
Quantum homogenization is a reservoir-based quantum state approximation protocol, which has been successfully implemented in state transformation on quantum hardware. In this work we move beyond that and propose the homogenization as a novel platform...
Reduced density matrix and entanglement Hamiltonian for a free real scalar field on an interval
Mikhail A. Baranov·Dec 18, 2024
An exact result for the reduced density matrix on a finite interval for a $1+1$ dimensional free real scalar field in the ground state is presented. In the massless case, the Williamson decomposition of the appearing kernels is explicitly performed, ...
Zeptojoule Calorimetry
Andr'as Gunyh'o, Kassius Kohvakka, Qi-Ming Chen +4 more·Dec 18, 2024
The measurement of energy is a fundamental tool used, for example, in exploring the early universe, characterizing particle decay processes, as well as in quantum technology and computing. Some of the most sensitive energy detectors are thermal, i.e....
Tensor-network decoders for process tensor descriptions of non-Markovian noise
Fumiyoshi Kobayashi, Hidetaka Manabe, G. A. White +3 more·Dec 18, 2024
Quantum error correction (QEC) is essential for fault-tolerant quantum computation. Often in QEC errors are assumed to be independent and identically distributed and can be discretised to a random Pauli error during the execution of a quantum circuit...
Hyperbolic Quantum Processor
E. Narimanov, E. Demler·Dec 18, 2024
Achieving strong coherent interaction between qubits separated by large distances holds the key to many important developments in quantum technology, including new designs of quantum computers, new platforms for quantum simulations and implementation...
Turning qubit noise into a blessing: Automatic state preparation and long-time dynamics for impurity models on quantum computers
Corentin Bertrand, Pauline Besserve, Michel Ferrero +1 more·Dec 18, 2024
Noise is often regarded as a limitation of quantum computers. In this work, we show that in the dynamical mean field theory (DMFT) approach to strongly-correlated systems, it can actually be harnessed to our advantage. Indeed, DMFT maps a lattice mod...
Optimizing quantum transformation matrices: Block decomposition approach for efficient gate reduction
Kin Man Lai, Xin Wang·Dec 18, 2024
This paper introduces an algorithm designed to approximate quantum transformation matrix with a restricted number of gates by using the block decomposition technique. Addressing challenges posed by numerous gates in handling large qubit transformatio...