Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Computation and Verification of Spectra for Non-Hermitian Systems
Catherine Drysdale, Matthew Colbrook, Michael T. M. Woodley·Nov 27, 2025
We establish a connection between quantum mechanics and computation, revealing fundamental limitations for algorithms computing spectra, especially in non-Hermitian settings. Introducing the concept of locally trivial pseudospectra (LTP), we show suc...
On the possibility of superradiant neutrino emission by atomic condensates
Massimo Blasone, Loredana Gastaldo, Francesco Romeo·Nov 27, 2025
In a recent work [B. J. P. Jones and J. A. Formaggio, Phys. Rev. Lett. 135, 111801 (2025)], the possibility of superradiant neutrino emission from atomic condensates has been theoretically proposed. Subsequent analysis by Y. K. Lu, H. Lin, and W. Ket...
Effect of Energy Extensivity on the Performance of Open Quantum Interferometers
Žan Kokalj, Tommaso Favalli, Andrea Trombettoni·Nov 27, 2025
Studying the performance of a quantum interferometer coupled to an external environment is a problem of conceptual and practical importance. If we consider a quantum interferometer featuring Heisenberg-limited sensitivity, then a typical result is th...
Sum rule for non-adiabatic geometric phases
Adam Fredriksson, Erik Sjöqvist·Nov 27, 2025
Berry monopoles always cancel when summing over a complete set of energy eigenstates. We demonstrate that analogous sum rules exist for geometric phases and their underlying 2-forms in non-adiabatic evolution. Our result has implications for qudit co...
Entanglement gain in supercatalytic state transformations
Guillermo Díez-Pastor, Julio I. de Vicente·Nov 27, 2025
Catalysis refers to the possibility of performing an otherwise impossible local state transformation by sharing an additional state, i.e. a catalyst, which is returned at the end of the protocol. There is a stronger version, known as supercatalysis, ...
Quantum-Enhanced Picostrain Sensing with Superconducting Qubits
Necati Çelik·Nov 27, 2025
We propose a quantum-enhanced picostrain sensor that achieves Heisenberg-limited strain sensing using superconducting qubits. A strain-sensitive qubit s Hamiltonian is coupled to the momentum quadrature of a microwave resonator, transducing mechanica...
Ultrafast Single Qubit Gates through Multi-Photon Transition Removal
Y. Gao, A. Galicia, J. D. Da Costa Jesus +12 more·Nov 27, 2025
One of the main enablers in quantum computing is having qubit control that is precise and fast. However, qubits typically have multilevel structures making them prone to unwanted transitions from fast gates. This leakage out of the computational subs...
Quantum resource degradation theory within the framework of observational entropy decomposition
Xiang Zhou·Nov 27, 2025
We introduce a theory of quantum resource degradation grounded in a decomposition of observational entropy, which partitions the total resource into inter-block coherence ($\mathcal{C}_{\text{rel}}$) and intra-block noise ($\mathcal{D}_{\text{rel}}$)...
Sunburst quantum Ising battery under periodic delta-kick charging
Ankita Mazumdar, Akash Mitra, Shashi C. L. Srivastava·Nov 27, 2025
Most quantum batteries studied so far with notable exception of Sachdev-Ye-Kitaev (SYK) batteries are based on integrable models, where superlinear scaling of charging power and hence a quantum advantage can be achieved, but at the cost of unstable s...
Unifying Collective Effects in Emission, Absorption, and Transfer
Adesh Kushwaha, Erik M. Gauger, Ivan Kassal·Nov 27, 2025
Collective effects, such as superradiance and subradiance are central to emerging quantum technologies -- from sensing to energy storage -- and play an important role in light-harvesting. These effects enhance or suppress rates of dynamic processes (...
Superradiant decay in non-Markovian Waveguide Quantum Electrodynamics
Rosa Lucia Capurso, Giuseppe Calajó, Simone Montangero +5 more·Nov 27, 2025
An array of initially excited emitters coupled to a one-dimensional waveguide exhibits superradiant decay under the Born-Markov approximation, manifested as a coherent burst of photons in the output field. In this work, we employ tensor-network metho...
Excited state preparation on a quantum computer through adiabatic light-matter coupling
Hugh G. A. Burton, Maria-Andreea Filip·Nov 27, 2025
Quantum computing has the potential to transform simulations of quantum many-body problems at the heart of electronic structure theory. Efficient quantum algorithms to compute the eigenstates of fermionic Hamiltonians, such as quantum phase estimatio...
RELiQ: Scalable Entanglement Routing via Reinforcement Learning in Quantum Networks
Tobias Meuser, Jannis Weil, Aninda Lahiri +1 more·Nov 27, 2025
Quantum networks are becoming increasingly important because of advancements in quantum computing and quantum sensing, such as recent developments in distributed quantum computing and federated quantum machine learning. Routing entanglement in quantu...
Twisted (co)homology of non-orientable Weyl semimetals
Thijs Douwes, Marcus Stålhammar·Nov 27, 2025
The quasi-particle excitations in Weyl semimetals, known as Weyl fermions, are usually forced to emerge in charge-conjugate pairs by the Nielsen--Ninomiya theorem. When the Brillouin zone is non-orientable, this constraint is replaced by a $\mathbb{Z...
Untangling Surface Codes: Bridging Braids and Lattice Surgery
Alexandru Paler·Nov 27, 2025
We present a systematic method for translating fault-tolerant quantum circuits between their braiding and lattice surgery (LS) representations within the surface code. Our approach employs the ZX calculus to establish an equivalence between these two...
Programmable generation of arbitrary continuous-variable anharmonicities and nonlinear couplings
Teerawat Chalermpusitarak, Kai Schwennicke, Ivan Kassal +1 more·Nov 27, 2025
Harmonic oscillators are promising continuous-variable (CV) quantum resources because their infinite-dimensional Hilbert spaces allow for resource-efficient quantum computing and simulation. To reach their full potential, CV platforms need to be able...
Non-commutativity as a Universal Characterization for Enhanced Quantum Metrology
Ningxin Kong, Haojie Wang, Mingsheng Tian +4 more·Nov 27, 2025
A central challenge in quantum metrology is to effectively harness quantum resources to surpass classical precision bounds. Although recent studies suggest that the indefinite causal order may enable sensitivities to attain the super-Heisenberg scali...
Local Equivalences of Graph States
Nathan Claudet·Nov 27, 2025
Graph states form a large family of quantum states that are in one-to-one correspondence with mathematical graphs. Graph states are used in many applications, such as measurement-based quantum computation, as multipartite entangled resources. It is t...
Enhancing information retrieval in quantum-optical critical systems via quantum measurement backaction
Cheng Zhang, Mauro Cirio, Xin-Qi Li +1 more·Nov 27, 2025
Continuous monitoring of open quantum-optical systems offers a promising route towards quantum-enhanced estimation precision. In such continuous-measurement-based sensing protocols, the ultimate precision limit is dictated, through the quantum Cramér...
Quantum phase transitions of the anisotropic Dicke-Ising model in driven Rydberg arrays
Bao-Yun Dong, Ying Liang, Stefano Chesi +1 more·Nov 27, 2025
We study the properties of a generalized Dicke-Ising model realized with an array of Rydberg atoms, driven by microwave electric fields and coupled to an optical cavity. As this platform allows for a precisely tunable anisotropy parameter, the model ...