Papers
Live trends in quantum computing research, updated daily from arXiv.
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Network-Based Quantum Computing: an efficient design framework for many-small-node distributed fault-tolerant quantum computing
Soshun Naito, Yasunari Suzuki, Yuuki Tokunaga·Jan 14, 2026
In fault-tolerant quantum computing, a large number of physical qubits are required to construct a single logical qubit, and a single quantum node may be able to hold only a small number of logical qubits. In such a case, the idea of distributed faul...
Efficient State Preparation for Quantum Machine Learning
Chris Nakhl, Maxwell West, Muhammad Usman·Jan 14, 2026
One of the key considerations in the development of Quantum Machine Learning (QML) protocols is the encoding of classical data onto a quantum device. In this chapter we introduce the Matrix Product State representation of quantum systems and show how...
Herzberg-Teller coupling in coherent multidimensional spectroscopy: analytical response functions for multilevel systems
Filippo Troiani·Jan 14, 2026
Coherent multidimensional spectroscopy enables detailed investigations of vibronic effects in molecular and solid-state systems. We present explicit analytical expressions for multidimensional nonlinear response functions in the presence of Herzberg-...
Eigenstate Thermalization and Spectral Imprints of the Hamiltonian in Local Observables
Shivam Mishra, C Jisha, Ravi Prakash·Jan 14, 2026
The Eigenstate Thermalization Hypothesis explains thermalization in isolated quantum systems through the statistical properties of observables in the energy eigenbasis. We investigate the crossover from integrability to chaos in the spin-$1/2$ XXZ ch...
A game-theoretic probability approach to loopholes in CHSH experiments
Takara Nomura, Koichi Yamagata, Akio Fujiwara·Jan 14, 2026
We study the CHSH inequality from an informational, timing-sensitive viewpoint using game-theoretic probability, which avoids assuming an underlying probability space. The locality loophole and the measurement-dependence (``freedom-of-choice'') looph...
A Posteriori Certification Framework for Generalized Quantum Arimoto-Blahut Algorithms
Geng Liu, Masahito Hayashi·Jan 14, 2026
The generalized quantum Arimoto--Blahut (QAB) algorithm is a powerful derivative-free iterative method in quantum information theory. A key obstacle to its broader use is that existing convergence guarantees typically rely on analytical conditions th...
Fractional Revival Dynamics in Kerr-Type Systems: Angular Momentum Moments and Classical Analogs
Ashish Kumar Patra, Saikumar Krithivasan·Jan 14, 2026
Wave packet revivals and fractional revivals are hallmark quantum interference phenomena that arise in systems with nonlinear energy spectra, and their signatures in expectation values of observables have been studied extensively in earlier work. In ...
Relaxation Process During Complex Time Evolution In Two-Dimensional Integrable and Chaotic CFTs
Chen Bai, Weibo Mao, Masahiro Nozaki +2 more·Jan 14, 2026
We investigate the complex time evolution of a vacuum state with the insertion of a local primary operator in two-dimensional conformal field theories (2d CFTs). This complex time evolution can be considered as a composite process constructed from Lo...
Geometric Hybrid Poincaré Sphere with Variable Poles
Chihiro Tago, Takashi Kakue, Ken Morita·Jan 14, 2026
We propose a geometric hybrid Poincaré sphere (GHPS) as a unified geometrical framework for describing structured photon states with independently controllable spin angular momentum (SAM) and orbital angular momentum (OAM). Unlike the conventional hi...
Scale Invariance Breaking and Discrete Phase Invariance in Few-Body Problems
Satoshi Ohya·Jan 14, 2026
Scale invariance in quantum mechanics can be broken in several ways. A well-known example is the breakdown of continuous scale invariance to discrete scale invariance, whose typical realization is the Efimov effect of three-body problems. Here we dis...
Ascertaining higher-order quantum correlations in high energy physics
Ao-Xiang Liu, Cong-Feng Qiao·Jan 14, 2026
Nonlocality is a peculiar nature of quanta and it stands as an important quantum resource in application. Yet mere linear property of it, viz. the first order in moment, has been explored through various inequalities. Noticing the vast higher-order r...
Many-Body Effects in Dark-State Laser Cooling
Muhammad Miskeen Khan, David Wellnitz, Bhuvanesh Sundar +5 more·Jan 14, 2026
We develop a unified many-body theory of two-photon dark-state laser cooling, the workhorse for preparing trapped ions close to their motional quantum ground state. For ions with a $Λ$ level structure, driven by Raman lasers, we identify an ion-numbe...
Transient fields in oblique scattering from an infinite planar dielectric interface -- a qubit lattice simulation
Min Soe, George Vahala, Linda Vahala +3 more·Jan 14, 2026
An initial value algorithm is utilized to examine the time dependent evolution of the electromagnetic fields arising from oblique scattering of bounded pulses from an infinite planar dielectric interface. Since the qubit lattice algorithm (QLA) is al...
Quantum Latin squares of order $6m$ with all possible cardinalities
Ying Zhang, Lijun Ji·Jan 14, 2026
A quantum Latin square of order $n$ (denoted as QLS$(n)$) is an $n\times n$ array whose entries are unit column vectors from the $n$-dimensional Hilbert space $\mathcal{H}_n$, such that each row and column forms an orthonormal basis. Two unit vectors...
Bidirectional Decoding for Concatenated Quantum Hamming Codes
Chao Zhang, Zipeng Wu, Jiahui Wu +1 more·Jan 14, 2026
High-rate concatenated quantum codes offer a promising pathway toward fault-tolerant quantum computation, yet designing efficient decoders that fully exploit their error-correction capability remains a significant challenge. In this work, we introduc...
Distributed Exact Quantum Amplitude Amplification Algorithm for Arbitrary Quantum States
Xu Zhou, Wenxuan Tao, Keren Li +1 more·Jan 14, 2026
In the noisy intermediate-scale quantum (NISQ) era, distributed quantum computation has garnered considerable interest, as it overcomes the physical limitations of single-device architectures and enables scalable quantum information processing. In th...
A saturation-absorption rubidium magnetometer with multilevel optical Bloch-equation modeling for intermediate-to-high fields
Mayand Dangi, Prateek Rajan Gupta, Joseph Kasti +5 more·Jan 14, 2026
We present SASHMAG (Saturated Absorption Spectroscopy High-field MAGnetometer), an atomic sensor designed for precision magnetic-field measurements in the intermediate-to-high field regime ($>0.2\,\text{T}$) using Rubidium-87 ($^{87}Rb$). The sensor ...
Learning Volterra Kernels for Non-Markovian Open Quantum Systems
Jimmie Adriazola, Katarzyna Roszak·Jan 14, 2026
We develop a data-driven framework for identifying non-Markovian dynamical equations of motion for open quantum systems. Starting from the Nakajima--Zwanzig formalism, we vectorize the reduced density matrix into a four-dimensional state vector and c...
Near-optimal discrimination of displaced squeezed binary signals using displacement, inverse-squeezing, and photon-number-resolving detection
Enhao Bai, Jian Peng, Tianyi Wu +6 more·Jan 14, 2026
We propose an inverse-squeezing Kennedy receiver for discriminating binary phase-shift-keyed displaced squeezed vacuum states. The receiver combines a Kennedy-type nulling displacement, an orthogonally oriented inverse-squeezing operation and photon-...
Mechanistic principles of exciton-polariton relaxation
Ian Haines, Arshath Manjalingal, Logan Blackham +2 more·Jan 14, 2026
Exciton-polaritons are light-matter hybrid quasi-particles that have emerged as a flexible platform for developing quantum technologies and engineering material properties. However, the fundamental mechanistic principles that govern their dynamics an...