Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Learning Feedback Mechanisms for Measurement-Based Variational Quantum State Preparation
D. Puente, Matteo Rizzi·Nov 29, 2024
This work introduces a self-learning protocol that incorporates measurement and feedback into variational quantum circuits for efficient quantum state preparation. By combining projective measurements with conditional feedback, the protocol learns st...
Quantum simulation of thermal field theories
Iv'an Cunt'in, Wenyang Qian, Bin Wu·Nov 29, 2024
We present our recent studies on thermal field theories using quantum algorithms. We first delve into the representation of quantum fields via qubits on general digital quantum computers alongside the quantum algorithms employed to evaluate thermal p...
Quantum algorithm for unstructured search of ranked targets
Kota Tani, Shunji Tsuchiya, S. Tani +1 more·Nov 29, 2024
Grover’s quantum algorithm can find a marked item from an unstructured database faster than any classical algorithm, and hence it has been used for several applications such as cryptanalysis and optimization. When there exist multiple marked items, G...
Quantum feedback control with a transformer neural network architecture
Pranav Vaidhyanathan, Florian Marquardt, Mark T. Mitchison +1 more·Nov 28, 2024
Attention-based neural networks such as transformers have revolutionized various fields such as natural language processing, genomics, and vision. Here, we demonstrate the use of transformers for quantum feedback control through both a supervised and...
Impact of leakage on the dynamics of a ST$_0$ qubit implemented in a Double Quantum Dot device
Javier Oliva del Moral, Olatz Sanz Larrarte, Reza Dastbasteh +2 more·Nov 28, 2024
Spin qubits in quantum dots are a promising technology for quantum computing due to their fast response time and long coherence times. An electromagnetic pulse is applied to the system for a specific duration to perform a desired rotation. To avoid d...
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...
Training the parametric interactions in an analog bosonic quantum neural network with Fock basis measurement
Julien Dudas, Baptiste Carles, Elie Gouzien +2 more·Nov 28, 2024
Quantum neural networks promise to extend the power of machine learning into the quantum domain, with potential applications ranging from automatic recognition of quantum states to the control of quantum devices. However, their physical implementatio...
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...
Shallow Quantum Scalar Products with Phase Information
Lila Cadi Tazi, D. M. Ramo, Alex J W Thom·Nov 28, 2024
The measurement of scalar products between two vectors is a common task in scientific computing and, by extension, in quantum computing. In this work, we introduce two alternative quantum circuits for computing scalar products with phase information,...
Solving the Nonlinear Vlasov Equation on a Quantum Computer
Tam'as 'A Vaszary, Animesh Datta, T. Goffrey +1 more·Nov 28, 2024
We present a mapping of the nonlinear, electrostatic Vlasov equation with Krook-type collision operators, discretized on a (1+1) dimensional grid, onto a recent Carleman linearization-based quantum algorithm for solving ordinary differential equation...
Limitations of quantum approximate optimization in solving generic higher-order constraint-satisfaction problems
T. Müller, Ajainderpal Singh, Frank K. Wilhelm +1 more·Nov 28, 2024
The ability of the quantum approximate optimization algorithm (QAOA) to deliver a quantum advantage on combinatorial optimization problems is still unclear. Recently, a scaling advantage over a classical solver was postulated to exist for random 8-SA...
Quantum computing of chirality imbalance in SU(2) gauge theory
Guofeng Zhang, Xingyu Guo, Enke Wang +1 more·Nov 28, 2024
We implement a variational quantum algorithm to investigate the chiral condensate in a 1+1 dimensional SU(2) non-Abelian gauge theory. The algorithm is evaluated using a proposed Monte Carlo sampling method, which allows the extension to large qubit ...
Dephasing-tolerant quantum sensing for transverse magnetic fields with spin qudits
Matteo Mezzadri, L. Lepori, Alessandro Chiesa +1 more·Nov 28, 2024
We propose a dephasing-tolerant protocol for quantum sensing of transverse magnetic fields which exploits spin qudit sensors with embedded fault-tolerant (FT) quantum error correction. By exploiting longitudinal drives, the transverse field induces l...
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...
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...
Effective temperature in approximate quantum many-body states
Yu-Qin Chen, Shi-Xin Zhang·Nov 28, 2024
In the pursuit of numerically identifying ground states of quantum many-body systems, approximate quantum wave function ansatzes are commonly employed. This study focuses on the spectral decomposition of these approximate quantum many-body states int...
Performance of a Superconducting Quantum Battery
S. Elghaayda, Asad Ali, S. Al-kuwari +3 more·Nov 28, 2024
Finding a quantum battery model that demonstrates a quantum advantage while remaining feasible for experimental production is a considerable challenge. Here, a superconducting quantum battery (SQB) model that exhibits such an advantage is introduced....
Bit symmetry entails the symmetry of the quantum transition probability
Gerd Niestegge·Nov 27, 2024
It is quite common to use the generalized probabilistic theories (GPTs) as generic models to reconstruct quantum theory from a few basic principles and to gain a better understanding of the probabilistic or information theoretic foundations of quantu...
Information geometry of bosonic Gaussian thermal states
Zixin Huang, Mark M. Wilde·Nov 27, 2024
Bosonic Gaussian thermal states form a fundamental class of states in quantum information science. This paper explores the information geometry of these states, focusing on characterizing the distance between two nearby states and the geometry induce...
Parallel Token Swapping for Qubit Routing
Ishan Bansal, O. Günlük, Richard Shapley·Nov 27, 2024
In this paper we study a combinatorial reconfiguration problem that involves finding an optimal sequence of swaps to move an initial configuration of tokens that are placed on the vertices of a graph to a final desired one. This problem arises as a c...