Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Time dispersion in bound states
John Ashmead·Jan 29, 2025
In quantum mechanics time is generally treated as a parameter rather than an observable. For instance wave functions are treated as extending in space, but not in time. But from relativity we expect time and space should be treated on the same basis....
Quantum simulation of Non-Abelian lattice gauge theories: A variational approach to D 8 with dynamical matter
Emanuele Gaz, Pavel P. Popov, Guy Pardo +3 more·Jan 29, 2025
In this work, we address the problem of a resource-efficient formulation of non-Abelian LGTs by focusing on the difficulty of simulating fermionic degrees of freedom and the Hilbert space redundancy. First, we show a procedure that removes the matter...
Quantum circuit for exponentiation of Hamiltonians: an algorithmic description based on tensor products
G. Fleury, P. Lacomme·Jan 29, 2025
Exponentiation of Hamiltonians refers to a mathematical operation to a Hamiltonian operator, typically in the form e^(-i.t.H), where H is the Hamiltonian and t is a time parameter. This operation is fundamental in quantum mechanics, particularly to e...
Machine-Learning-Enhanced Optimization of Noise-Resilient Variational Quantum Eigensolvers
K. Nicoli, Luca J. Wagner, L. Funcke·Jan 29, 2025
Variational Quantum Eigensolvers (VQEs) are a powerful class of hybrid quantum-classical algorithms designed to approximate the ground state of a quantum system described by its Hamiltonian. VQEs hold promise for various applications, including latti...
Linear-time classical approximate optimization of cubic-lattice classical spin glasses
Adil A. Gangat·Jan 28, 2025
Demonstrating quantum speedup for approximate optimization of classical spin glasses is of current interest. Such a demonstration must be done with respect to the best-known scaling of classical heuristics at a given optimality gap of a given problem...
Amplifying microwave pulses with a single qubit engine fueled by quantum measurements
Rémy Dassonneville, Cyril Elouard, Romain Cazali +4 more·Jan 28, 2025
Recent progress in manipulating individual quantum systems enables the exploration of engines exploiting non-classical resources. One of the most appealing is the energy provided by the inherent backaction of quantum measurements. While a handful of ...
Entanglement and squeezing of gravitational waves
Thiago Guerreiro·Jan 28, 2025
We show that the self-interactions present in the effective field theory formulation of general relativity can couple gravitational wave modes and generate nonclassical states. The output of gravitational nonlinear processes can also be sensitive to ...
Exciton pairs coupled via the long-living phonons and their superfluorescent markers
Vladimir Al. Osipov, Boris Fainberg·Jan 28, 2025
A system of several Wannier-Mott excitons interacting with phonons in a bulk material is considered. We show that strong exciton-phonon coupling causes the formation of a coherent two-exciton state -- the exciton pair. Unlike the biexcitons, where th...
Adversarial Robustness of Partitioned Quantum Classifiers
Pouya Kananian, Hans-Arno Jacobsen·Jan 28, 2025
Adversarial robustness in quantum classifiers is a critical area of study, providing insights into their performance compared to classical models and uncovering potential advantages inherent to quantum machine learning. In the NISQ era of quantum com...
Two measurement bases are asymptotically informationally complete for any pure state tomography
Tianfeng Feng, Tianqi Xiao, Yu Wang +6 more·Jan 28, 2025
One of the fundamental questions in quantum information theory is to find how many measurement bases are required to obtain the full information of a quantum state. While a minimum of four measurement bases is typically required to determine an arbit...
Quantum XYZ cyclic codes for biased noise
Zhipeng Liang, Fusheng Yang, Zhengzhong Yi +1 more·Jan 28, 2025
In some quantum computing architectures, Pauli noise is highly biased. Tailoring Quantum error-correcting codes to the biased noise may benefit reducing the physical qubit overhead without reducing the logical error rate. In this paper, we propose a ...
Simulating Methylamine Using a Symmetry-Adapted, Qubit Excitation-Based Variational Quantum Eigensolver
K. M. Makushin, A. K. Fedorov·Jan 28, 2025
Understanding the capabilities of quantum computer devices and computing the required resources to solve realistic tasks remain critical challenges associated with achieving useful quantum computational advantage. We present a study aimed at reducing...
Space-Time-Coupled Qubits for Enhanced Superconducting Quantum Computing
S. Taravati·Jan 28, 2025
The pursuit of scalable and robust quantum computing necessitates innovative approaches to overcome the inherent challenges of qubit connectivity, decoherence, and susceptibility to noise and crosstalk. Conventional monochromatic qubit coupling archi...
Efficient compilation of quantum circuits using multi-qubit gates
Jonathan Nemirovsky, Maya Chuchem, Yotam Shapira·Jan 28, 2025
As quantum processors grow in scale and reliability, the need for efficient quantum gate decomposition of circuits to a set of specific available gates, becomes ever more critical. The decomposition of a particular algorithm into a sequence of these ...
High-fidelity QND readout and measurement back-action in a tantalum-based high-coherence fluxonium qubit
Gaurav Bothara, Srijita Das, K. Salunkhe +4 more·Jan 28, 2025
Implementing a precise measurement of the quantum state of a qubit is critical for building a practical quantum processor, as it plays an important role in state initialization and quantum error correction. While the transmon qubit has been the most ...
Programming tools for Analogue Quantum Computing in the High-Performance Computing Context - A Review
Mateusz Meller, Vendel Szeremi, O. T. Brown·Jan 28, 2025
Recent advances in quantum computing have brought us closer to realizing the potential of this transformative technology. While significant strides have been made in quantum error correction, many challenges persist, particularly in the realm of nois...
Designing Minimalistic Variational Quantum Ansatz Inspired by Algorithmic Cooling
Soyoung Shin, Ha Eum Kim, Hyeonjun Yeo +3 more·Jan 28, 2025
This study introduces a novel minimalistic variational quantum ansatz inspired by algorithmic cooling principles. The proposed Heat Exchange algorithmic cooling ansatz (HE ansatz) facilitates efficient population redistribution without requiring bath...
Unorthodox parallelization for Bayesian quantum state estimation
Hanson H Nguyen, Kody J. H. Law, J. Lukens·Jan 28, 2025
Quantum state tomography (QST) allows for the reconstruction of quantum states through measurements and some inference technique under the assumption of repeated state preparations. Bayesian inference provides a promising platform to achieve both eff...
Dephasing-induced leakage in multi-level superconducting quantum circuits
F. Strauch·Jan 28, 2025
Superconducting quantum circuits, such as the transmon, have multiple quantum states beyond the computational subspace. These states can be populated during quantum logic operations; residual population in such states is known as leakage. While contr...
Entanglement in Markovian hybrid classical-quantum theories of gravity
Oliviero Angeli, Matteo Carlesso·Jan 27, 2025
Markovian master equations underlie many areas of modern physics and, despite their apparent simplicity, they encode a rich and complex dynamics which is still under active research. We identify a class of continuous variable Markovian master equatio...