Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Improving the efficiency of quantum annealing with controlled diagonal catalysts
Tomohiro Hattori, Shu Tanaka·Mar 19, 2025
Quantum annealing is a promising algorithm for solving combinatorial optimization problems. It searches for the ground state of the Ising model, which corresponds to the optimal solution of a given combinatorial optimization problem. The guiding prin...
Universal spectral bounds for the quantum Rabi model: Extending Braak's conjecture
Alfonso Lanuza·Mar 19, 2025
The quantum Rabi model is a paradigmatic example of a minimal yet nontrivial light-matter interaction, whose spectrum is transcendental yet exhibits a number of regularities. Braak observed that the eigenvalues bunch or anti-bunch following strict ru...
Logical entanglement distribution between distant 2D array qubits
Yuya Maeda, Yasunari Suzuki, Toshiki Kobayashi +3 more·Mar 19, 2025
Sharing logical entangled pairs between distant quantum nodes is a key process to achieve fault tolerant quantum computation and communication. However, there is a gap between current experimental specifications and theoretical requirements for shari...
Quantum Metropolis-Hastings algorithm
Jonathan E. Moussa·Mar 19, 2025
I generalize the well-known classical Metropolis-Hastings algorithm into a quantum algorithm that can equilibrate, measure, and mix a quantum thermal state on a quantum computer. It performs non-symmetric transitions on labels of state preparation an...
QEA: An Accelerator for Quantum Circuit Simulation with Resources Efficiency and Flexibility
Van Duy Tran, Tuan Hai Vu, V. Le +2 more·Mar 19, 2025
The area of quantum circuit simulation has attracted a lot of attention in recent years. However, due to the exponentially increasing computational costs, assessing and validating these models on large datasets poses significant obstacles. Despite pl...
Provably optimal exact gate synthesis from a discrete gate set
'Elie Gouzien, N. Sangouard·Mar 19, 2025
We propose a method for exact circuit synthesis using a discrete gate set, as required for fault-tolerant quantum computing. Our approach translates the problem of synthesizing a gate specified by its unitary matrix into a boolean satisfiability (SAT...
Two-qubit logic and teleportation with mobile spin qubits in silicon
Y. Matsumoto, M. D. Smet, L. Tryputen +6 more·Mar 19, 2025
The scalability and power of quantum computing architectures depend critically on high-fidelity operations and robust and flexible qubit connectivity. In this respect, mobile qubits are particularly attractive as they enable dynamic and reconfigurabl...
SparQSim: Simulating Scalable Quantum Algorithms via Sparse Quantum State Representations
Tai-Ping Sun, Zhao-Yun Chen, Yun-Jie Wang +6 more·Mar 19, 2025
Efficient simulation of large-scale quantum algorithms is pivotal yet challenging due to the exponential growth of the state space inherent in both Sch\"odinger-based and Feynman-based methods. While Feynman-based simulators can be highly efficient w...
Absolutely Maximal Entanglement in Continuous Variables
James I. Kwon, A. J. Brady, Victor V. Albert·Mar 19, 2025
We explore absolutely maximal entanglement (AME) and k-uniformity in continuous-variable (CV) quantum systems, and show that-unlike in qudit systems-such entanglement is readily realizable in both Gaussian and non-Gaussian quantum states of multiple ...
Polarization-dependent topology in quantum emitter chains
Jonathan Sturm, Adriana Pálffy·Mar 18, 2025
The role of polarization in the topology of quantum emitter chains is investigated theoretically, whereby "polarization" refers to the transition dipole moments of the emitters. We show that, if the chain is zigzag-shaped, different topological phase...
Degenerate mirrorless lasing in thermal vapors
Aneesh Ramaswamy, Dmitry Budker, Simon Rochester +5 more·Mar 18, 2025
Theoretical predictions were made for the steady-state gain of an orthogonally polarized probe field in a degenerate two-level alkali atom system driven by a linearly polarized continuous-wave pump field in [Opt. Mem. Neural Networks 32 (Suppl 3), S4...
Protected phase gate for the $0$-$π$ qubit using its internal modes
Xanda C Kolesnikow, Thomas B Smith, Felix Thomsen +2 more·Mar 18, 2025
Protected superconducting qubits such as the $0$-$π$ qubit promise to substantially reduce physical error rates. However, a key challenge in the field is designing gates for these qubits that do not compromise their protection, or become infeasibly s...
Efficient quantum simulation for translationally invariant systems
Joris Kattemölle, Guido Burkard·Mar 18, 2025
Discrete translational symmetry plays a fundamental role in condensed matter physics and lattice gauge theories, enabling the analysis of systems that would otherwise be intractable. Despite this, many open problems remain. Quantum simulation promise...
TEPID-ADAPT: Adaptive variational method for simultaneous preparation of low-temperature Gibbs and low-lying eigenstates
Bharath Sambasivam, Kyle Sherbert, Karunya Shirali +4 more·Mar 18, 2025
Preparing Gibbs states, which describe systems in equilibrium at finite temperature, is of great importance, particularly at low temperatures. In this work, we propose a new method -- TEPID-ADAPT -- that prepares the thermal Gibbs state of a given Ha...
Blockchain with proof of quantum work
Mohammad H. Amin, Jack Raymond, Daniel Kinn +7 more·Mar 18, 2025
We propose a blockchain architecture in which mining requires a quantum computer. The consensus mechanism is based on proof of quantum work, a quantum-enhanced alternative to traditional proof of work that leverages quantum supremacy to make mining i...
Scalable architecture for measurement induced squeezed light interferometers
Abhinav Verma, Jacob Hastrup, Jonas S. Neergaard-Nielsen +1 more·Mar 18, 2025
Scalable interferometers lie at the heart of photonic quantum technologies, but their expansion has been fundamentally limited by optical losses that grow with circuit depth. Here, we introduce and experimentally demonstrate a measurement-induced arc...
Frustration-free free fermions
Seishiro Ono, Rintaro Masaoka, Haruki Watanabe +1 more·Mar 18, 2025
We develop a general theory of frustration-free free-fermion systems and derive the necessary and sufficient conditions for such Hamiltonians. Assuming locality and translation invariance, we find that any band touching between the valence and the co...
A Cascaded Random Access Quantum Memory
Ziqian Li, Eesh Gupta, Fang Zhao +7 more·Mar 18, 2025
Dynamic random access memory (DRAM) is critical to classical computing but notably absent in current superconducting quantum processors. Integrating high-coherence memory units would enable resource-efficient control of logical qubits and allow the s...
Heuristic and Optimal Synthesis of CNOT and Clifford Circuits
Mark A. Webster, Stergios Koutsioumpas, Dan E. Browne·Mar 18, 2025
Efficiently implementing Clifford circuits is crucial for quantum error correction and quantum algorithms. Linear reversible circuits, equivalent to circuits composed of CNOT gates, have important applications in classical computing. In this work we ...
Quantum thermal machines in BTZ black hole spacetime
D. Moustos, O. Abah·Mar 18, 2025
We investigate an Otto thermodynamic cycle with a qubit Unruh-DeWitt detector as the working medium, coupled to a massless, conformally coupled scalar quantum field in the Hartle-Hawking vacuum in a (2+1)-dimensional BTZ black hole spacetime. We empl...