Quantum Physics · Physics & Astronomy
Quantum Physics
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3,630 papers, from 4 September 2026 to 5 November 2026: 3,630 arXiv preprints.
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Newest papers, page 142
More mutually unbiased bases
Mutually unbiased bases (MUBs) describe quantum measurements for which certainty in one basis gives uniform outcomes in the others.Explicit Capacity-Achieving Quantum LDPC Codes List Decodable in Near-linear Time
In classical coding theory, the quest for explicit codes achieving list decoding capacity has been an important driving force.Quantum Sampling of Random Spanning Trees via Amortized Data Structures
We present a quantum algorithm that generates a uniform superposition over the spanning trees of a graph -- also known as a q-sample -- using only a sub-linear number of queries to the graph.Local Automorphism-Aware Syndrome Compilation for General Quantum LDPC Codes
Low-depth syndrome extraction for Calderbank-Shor-Steane (CSS) quantum low-density parity-check codes can be formulated as a proper ordered edge-coloring problem subject to quantum parity constraints.Exponential quantum speedup for $\mathbb{F}_3^n$-Subset-Sum? Or, rigorous classical algorithms for Binary-Error LWE
We study vector subset sum over $\mathbb{F}_3^n$: given $m$ random vectors from $\mathbb{F}_3^n$, find a nonempty subset that sums to zero; the smaller $m$, the more difficult it is to find such a…Computational Work Extraction: The Complexity of Catalysts
We prove maximal separations: $n$-qubit systems can have $Θ(n)$ ergotropy, while every efficient process extracts negligible work, even for Hamiltonians consisting of single-qubit terms.Quantum Enhanced Deep Reinforcement Learning for Distribution Network Reconfiguration
Modern smart grids generate increasingly rich operational data and deploy greater numbers of remotely controlled switching assets than ever before, creating new opportunities for data-driven…Bath-assisted cooling without resets
Cooling an arbitrary mixed state to a pure ground state requires transferring its entropy to an environment.Fast Quantum Algorithms for Learning Linear Threshold Functions
Linear threshold functions are $f_{w,θ}(x)=\text{sign}(\langle x,w \rangle -θ)$, where the weight vector $w\in\mathbb{R}^n$ is a unit vector, $θ\in\mathbb R$ is a threshold, and typically…Tight Universal Bounds on Quantum Data Hiding with Multipartite Werner States
Quantum data hiding concerns pairs of states which are highly distinguishable with global measurements, yet nearly indistinguishable when restricted to local operations and classical communication.A Noise Operator Approach to Quantum Query Complexity and Time-Space Tradeoff Lower Bounds
Time and space (memory) are two of the most important measures of cost in computation, even more so for quantum computation.Local Relaxation Hierarchies for Quantum Ground State Energies: Convergence Guarantees and Message Passing Algorithms
Convex relaxation hierarchies provide lower bounds to the ground state energy of quantum many-body systems that can be computed in polynomial time on a classical computer, at any fixed hierarchy…The Single-Copy Quantum Bandit Is Classical: An Exact Spectral Collapse
We study multi-armed bandits whose arms supply unknown quantum states and whose mean rewards are defined by a known effect $F$.Quantum de Finetti theorems for states and channels in any distance measure
Standard finite quantum de Finetti theorems approximate the $k$-system marginals of permutation-invariant states of $n$-systems by mixtures of independent and identically distributed (iid) states…Gibbs Sampling in the Shattered Phase by Decoded Quantum Interferometry
We apply Decoded Quantum Interferometry (DQI) to sample from the Gibbs measures of classical Ising spin Hamiltonians.Resonances control when multiterminal Josephson currents reduce to two-terminal couplings
Multiterminal Josephson junctions, in which one weak link couples three or more superconductors, are studied as hosts of topological Andreev bands, multi-pair supercurrents and tunable circuit…Efficient Calculation of Equilibrium Correlation Functions
A majority of measurable dynamic quantities of a physical system is described as an equilibrium correlation function of the form $G_{AB}(t-t') = \left $, where $t'$ represents the impact time and…On The Simplest Quantum-Secure Block Cipher
Pseudorandom permutations are ubiquitous in theoretical and applied cryptography.All Unitaries Have Constant Depth Quantum Circuits
It is well-known that every $n$-qubit unitary can be implemented by a $2^{O(n)}$-depth quantum circuit using single- and two-qubit gates.Quantum hypothesis testing of non-mixed-unitarity: A multifaceted hierarchy of quantum channel discrimination
Given multiple uses of an unknown quantum channel, we determine whether it is a specified non-mixed-unitary channel or belongs to the set of mixed-unitary channels.