Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
27,548
This Month
1,041
Today
0
Research Volume
12,891 papers in 12 months (-5% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Thermodynamic Uncertainty Relation with Quantum Feedback
Ryotaro Honma, Tan Van Vu·Feb 26, 2026
Fluctuations are intrinsic to microscopic systems and impose fundamental limits on nonequilibrium precision, as captured by the thermodynamic uncertainty relation (TUR), which links current fluctuations to entropy production. While feedback control i...
Finite key analysis of experimentally realized practical COW-QKD protocol
Neha Pathania, Sandeep Mishra, Anirban Pathak·Feb 26, 2026
An experimental implementation of the Coherent One-Way Quantum Key Distribution (COW-QKD) protocol is reported under realistic conditions, and a clean and easy-to-use framework for performing finite key analysis of the COW-QKD protocol is provided by...
Vibration induced transparency and absorption with two ion ensembles in a linear trap
Wenjun Shao, Jian Li·Feb 26, 2026
We study the spectra of collective low excitations of two atomic ion ensembles which are confined in a liner trap by addressing lases. When the left ensemble is driven by an external optical field, its corresponding response spectrum to the incident ...
On some signatures of Lie-Hamilton System in Quantum Hamilton Jacobi Equation
Arindam Chakraborty·Feb 26, 2026
The general forms of Quantum Hamilton Jacobi Equation for a particle of constant mass, position dependent effective mass and non-Hermitian Effective mass Swanson model have been considered. It has been found that the said equations can be recast in t...
SYK thermal expectations are classically easy at any temperature
Alexander Zlokapa, Bobak T. Kiani·Feb 26, 2026
Estimating thermal expectations of local observables is a natural target for quantum advantage. We give a simple classical algorithm that approximates thermal expectations, and we show it has quasi-polynomial cost $n^{O(\log n/ε)}$ for all temperatur...
Loss-insensitive quantum noise reduction in a Raman amplifier with coherent feedback
Jianmin Wang, Rong Zhu, Z. Y. Ou·Feb 26, 2026
A quantum amplifier usually adds extra noise inevitably through coupling to internal degrees of freedom while amplifying the signal. The introduction of quantum correlations can effectively suppress this extra noise. In this work, we utilize the esta...
Optimizing Doppler laser cooling protocols for quantum sensing with 3D ion crystals in a Penning trap
John Zaris, Wes Johnson, Athreya Shankar +4 more·Feb 26, 2026
Large, 3D trapped ion crystals offer improved sensitivity in quantum sensing protocols, and are expected to be implemented as platforms in near-future experiments. However, numerical techniques used to study the laser cooling of such crystals are ine...
The Road to Useful Quantum Computers
Timothy Proctor, Robin Blume-Kohout, Andrew Baczewski·Feb 26, 2026
Building a useful quantum computer is a grand science and engineering challenge, currently pursued intensely by teams around the world. In the 1980s, Richard Feynman and Yuri Manin observed independently that computers based on quantum mechanics migh...
Gravitational decoherence and recoherence of a composite particle: the interplay between gravitons and a classical Newtonian potential
Thiago H. Moreira, Lucas Chibebe Céleri·Feb 26, 2026
The fact that gravitational environments cannot be shielded (since gravity is universal) makes them of great theoretical interest to decoherence mechanisms and to the quantum-to-classical transition. While past results seemed to indicate that gravito...
Quantified convergence of general homodyne measurements with applications to continuous variable quantum computing
Emanuel Knill, Ezad Shojaee, James R. van Meter +2 more·Feb 26, 2026
In arXiv:2503.00188 we introduced broadband pulsed (BBP) homodyne measurements as a generalization of standard pulsed homodyne quadrature measurements. BBP can take advantage of detectors such as calorimeters that have the potential for high efficien...
Stabilization of Rydberg Dissipative Time Crystals Using a Scanning Fabry Perot Interferometer Transfer Lock
Darmindra Arumugam, Brook Feyissa·Feb 26, 2026
Stabilization of laser frequencies is critical for sensitive Rydberg measurements, including in applications such as dissipative time crystal (DTC) dynamics, yet conventional approaches often require complex or costly hardware. We demonstrate a compa...
Revisiting the Role of State Texture in Gate Identification and Fixed-Point Resource Theories
Alexander C. B. Greenwood, Joseph M. Lukens, Li Qian +1 more·Feb 26, 2026
A protocol for identifying controlled-NOT (CNOT) gates versus single-qubit-only gates in universal quantum circuits using randomized input states was recently shown to be intimately connected to the quantum resource of state texture. Here we revisit ...
Lattice studies of entanglement entropy in $O(N)$ models at finite densities
Aatu Rajala, Niko Jokela, T. Rindlisbacher·Feb 26, 2026
As a characteristic property of all quantum systems, entanglement participates in many important quantum phenomena. In this proceeding, we employ it in the study of quantum field theories at finite density. We incorporate evaluations of entanglement ...
Controlled symmetry breaking of the Fermi surface in ultracold polar molecules
Shrestha Biswas, Sebastian Eppelt, Weikun Tian +6 more·Feb 25, 2026
Long-range anisotropic dipole-dipole interactions between ultracold polar molecules are predicted to drive exotic quantum phases, yet direct many-body signatures of these interactions in degenerate Fermi gases have remained elusive. Here, we report t...
Macroscopic Quantum Electrodynamics with Gain: Modified Fluctuations and Their Consequences
Daigo Oue·Feb 25, 2026
Macroscopic quantum electrodynamics (MQED) provides a unified framework to describe quantum electromagnetic fields in the presence of arbitrary macroscopic environments. Central to this theory is the field correlation, which governs both radiative (e...
Hidden $Z_{2}\times Z_{2}$ subspace symmetry protection for quantum scars
Ayush Sharma, Vikram Tripathi·Feb 25, 2026
We study the paradigmatic spin-1 XY chain under open boundary conditions, which hosts exact quantum many-body scars generated by an emergent Spectrum Generating Algebra (SGA). We show that the scar subspace possesses a symmetry-protected trivial (SPt...
A field-biased HPZ master equation and its Markovian limit
M. Gabriela Boada G., Andrea Delgado, Jose Morales E·Feb 25, 2026
We present a first-principles derivation of a non-equilibrium quantum master equation for a continuously driven open quantum system interacting with a structured electromagnetic environment. Starting from a driven Caldeira-Leggett model in which an e...
Numerical Experiments with Parameter Setting of Trotterized Quantum Phase Estimation for Quantum Hamiltonian Ground State Computation
Elijah Pelofske, Stephan Eidenbenz·Feb 25, 2026
We numerically investigate quantum circuit elementary-gate level instantiations of the standard Quantum Phase Estimation (QPE) algorithm for the task of computing the ground-state energy of a quantum magnet; the disordered fully-connected quantum Hei...
Basis-independent stabilizerness and maximally noisy magic states
Michael Zurel, Jack Davis·Feb 25, 2026
Absolutely stabilizer states are those that remain convex mixtures of stabilizer states after conjugation by any unitary. Here we give a characterization of such states for multiple qudits of all prime dimensions by introducing a polytope of their al...
Schwinger-Keldysh field theory for operator Rényi entropy and entanglement growth in non-interacting systems with sub-ballistic transports
Priesh Roy, Sumilan Banerjee·Feb 25, 2026
The notion of operator growth in quantum systems furnishes a bridge between transport and the generation of entanglement between different parts of the system under quantum dynamics. We define a measure of operator growth in terms of subsystem operat...