Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum State Compression with Polar Codes
J. Weinberg, Avijit Mandal, Henry D. Pfister·Feb 28, 2024
In the quantum compression scheme proposed by Schumacher, Alice compresses a message that Bob decompresses. In that approach, there is some probability of failure and, even when successful, some distortion of the state. For sufficiently large blockle...
Linear gate bounds against natural functions for position-verification
V. Asadi, Richard Cleve, Eric Culf +1 more·Feb 28, 2024
A quantum position-verification scheme attempts to verify the spatial location of a prover. The prover is issued a challenge with quantum and classical inputs and must respond with appropriate timings. We consider two well-studied position-verificati...
A linear photonic swap test circuit for quantum kernel estimation
Alessio Baldazzi, N. Leone, M. Sanna +2 more·Feb 27, 2024
The swap test is a quantum algorithm capable of computing the absolute value of the scalar product of two arbitrary wavefunctions. Scalar products represent a crucial ingredient to many quantum machine learning (QML) methods, but their evaluation is ...
Combining quantum processors with real-time classical communication
Almudena Carrera Vazquez, C. Tornow, D. Ristè +3 more·Feb 27, 2024
Quantum computers process information with the laws of quantum mechanics. Current quantum hardware is noisy, can only store information for a short time and is limited to a few quantum bits, that is, qubits, typically arranged in a planar connectivit...
Note on simple and consistent gateset characterization including calibration and decoherence errors
J. Epstein·Feb 27, 2024
Building high-fidelity quantum computers requires efficient methods for the characterization of gate errors that provide actionable information that may be fed back into engineering efforts. Extraction of realistic error models is also critical to ac...
Quantum Circuit Discovery for Fault-Tolerant Logical State Preparation with Reinforcement Learning
Remmy Zen, J. Olle, Luis Colmenarez +3 more·Feb 27, 2024
The realization of large-scale quantum computers requires not only quantum error correction (QEC) but also fault-tolerant operations to handle errors that propagate into harmful errors. Recently, flag-based protocols have been introduced that use anc...
Cost of emulating a small quantum annealing problem in the circuit model
Javier Gonzalez-Conde, Zachary Morrell, Marc Vuffray +2 more·Feb 27, 2024
Demonstrations of quantum advantage for certain sampling problems have generated considerable excitement for quantum computing and have further spurred the development of circuit-model quantum computers, which represent quantum programs as a sequence...
Efficient quantum lattice gas automata
Antonio David Bastida Zamora, L. Budinski, Ossi Niemimäki +1 more·Feb 26, 2024
This study presents a novel quantum algorithm for lattice gas automata simulation with a single time step, demonstrating logarithmic complexity in terms of $CX$ gates. The algorithm is composed of three main steps: collision, mapping, and propagation...
Universal quantum operations and ancilla-based read-out for tweezer clocks
Ran Finkelstein, R. Tsai, Xiangkai Sun +6 more·Feb 25, 2024
Enhancing the precision of measurements by harnessing entanglement is a long-sought goal in quantum metrology1,2. Yet attaining the best sensitivity allowed by quantum theory in the presence of noise is an outstanding challenge, requiring optimal pro...
Resisting High-Energy Impact Events through Gap Engineering in Superconducting Qubit Arrays.
M. McEwen, K. Miao, J. Atalaya +24 more·Feb 23, 2024
Quantum error correction (QEC) provides a practical path to fault-tolerant quantum computing through scaling to large qubit numbers, assuming that physical errors are sufficiently uncorrelated in time and space. In superconducting qubit arrays, high-...
Sparse Probabilistic Synthesis of Quantum Operations
Bálint Koczor·Feb 23, 2024
Successful implementations of quantum technologies require protocols and algorithms that use as few quantum resources as possible. However, many important quantum operations, such as continuous rotation gates in quantum computing or broadband pulses ...
Quantum circuit optimization with AlphaTensor
Francisco J. R. Ruiz, Tuomas Laakkonen, Johannes Bausch +10 more·Feb 22, 2024
A key challenge in realizing fault-tolerant quantum computers is circuit optimization. Focusing on the most expensive gates in fault-tolerant quantum computation (namely, the T gates), we address the problem of T-count optimization, that is, minimizi...
Dynamical quantum maps for single-qubit gates under universal non-Markovian noise
J. M. Sánchez Velázquez, A. Steiner, R. Freund +4 more·Feb 22, 2024
Noise is both ubiquitous and generally deleterious in settings where precision is required. This is especially true in the quantum technology sector where system utility typically decays rapidly under its influence. Understanding the noise in quantum...
A Quick Introduction to Quantum Machine Learning for Non-Practitioners
Ethan N. Evans, Dominic M. Byrne, Matthew Cook·Feb 22, 2024
This paper provides an introduction to quantum machine learning, exploring the potential benefits of using quantum computing principles and algorithms that may improve upon classical machine learning approaches. Quantum computing utilizes particles g...
How to Fault-Tolerantly Realize Any Quantum Circuit with Local Operations
Shin Ho Choe, Robert Koenig·Feb 21, 2024
We show how to realize a general quantum circuit involving gates between arbitrary pairs of qubits by means of geometrically local quantum operations and efficient classical computation. We prove that circuit-level local stochastic noise modeling an ...
Improving Threshold for Fault-Tolerant Color-Code Quantum Computing by Flagged Weight Optimization
Yugo Takada, Keisuke Fujii·Feb 21, 2024
Color codes are promising quantum error-correction (QEC) codes because they have an advantage over surface codes in that all Clifford gates can be implemented transversally. However, the thresholds of color codes under circuit-level noise are relativ...
Reinforcement learning-assisted quantum architecture search for variational quantum algorithms
Akash Kundu·Feb 21, 2024
A significant hurdle in the noisy intermediate-scale quantum (NISQ) era is identifying functional quantum circuits. These circuits must also adhere to the constraints imposed by current quantum hardware limitations. Variational quantum algorithms (VQ...
Grover's Oracle for the Shortest Vector Problem and Its Application in Hybrid Classical–Quantum Solvers
Miloš Prokop, P. Wallden, David Joseph·Feb 21, 2024
Finding the shortest vector in a lattice is a problem that is believed to be hard both for classical and quantum computers. Many major postquantum secure cryptosystems base their security on the hardness of the shortest vector problem (SVP) (Moody, 2...
Evaluating Ground State Energies of Chemical Systems with Low-Depth Quantum Circuits and High Accuracy
Shuo Sun, Chandan Kumar, Kevin Shen +2 more·Feb 21, 2024
Quantum computers have the potential to efficiently solve the electronic structure problem but are currently limited by noise and shallow circuits. We present an enhanced Variational Quantum Eigensolver (VQE) ansatz based on the Qubit Coupled Cluster...
Clifford circuits over non-cyclic abelian groups
M. Moses, Jacek Horecki, Konrad Deka +1 more·Feb 21, 2024
We present a discussion of the generalized Clifford group over non-cyclic finite abelian groups. These Clifford groups appear naturally in the theory of topological error correction and abelian anyon models. We demonstrate a generalized Gottesman-Kni...