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quant-ph2026

Symmetry-driven thermalization via finite de Finetti theorems

Uttam Singh, Nicolas J. Cerf

Thermal behavior in subsystems of closed quantum systems is commonly attributed to dynamical chaos, quantum ergodicity, canonical typicality, or the eigenstate thermalization hypot…

quant-ph2025

Interferometric Braiding of Anyons in Chern Insulators

Felix A. Palm, Nader Mostaan, Nathan Goldman +1

Coherent control and braiding of anyons remain central challenges in realizing topologically protected quantum operations. We propose a Ramsey interferometry protocol to directly a…

quant-ph2025

No-go theorem for quantum realization of extremal correlations

Sujan V. K, Ravi Kunjwal

The study of quantum correlations is central to quantum information and foundations. The paradigmatic case of Bell scenarios considers product measurements implemented on a multipa…

quant-ph2025

Unbounded entanglement-sustaining sequential local quantum state discrimination

Debarupa Saha, Priya Ghosh, Kornikar Sen +2

Two pure orthogonal quantum states can be perfectly distinguished by sequential local action of multiple pairs of parties. However, this process typically leads to the complete dis…

quant-ph2025★ 1 cited

Configurable photonic simulator for quantum field dynamics

Mauro D'Achille, Martin Gärttner, Tobias Haas

Quantum field simulators provide unique opportunities for investigating the dynamics of quantum fields through tabletop experiments. A primary drawback of standard encoding schemes…

quant-ph2025★ 1 cited

Topologically noise robust network steering without inputs

Dhruv Baheti, Shubhayan Sarkar

Quantum networks with independent sources allow observing quantum nonlocality or steering with just a single measurement per node of the network, or without any inputs. Inspired by…

quant-ph2025

Detecting strongly non-Gaussian entanglement

Serge Deside, Tobias Haas, Nicolas J. Cerf

Efficiently certifying non-Gaussian entanglement in continuous-variable quantum systems is a central challenge for advancing quantum information processing, photonic quantum comput…

quant-ph2025★ 3 cited

Interferometric detection of continuous-variable entanglement using two states

Elena Callus, Martin Gärttner, Tobias Haas

The efficient witnessing and certification of entanglement is necessitated by its ubiquitous use in various aspects of quantum technologies. In the case of continuous-variable bipa…

quant-ph2024★ 8 cited

Prepare-and-measure scenarios with photon-number constraints

Carles Roch i Carceller, Jef Pauwels, Stefano Pironio +1

We study correlations in the prepare-and-measure scenario when quantum communication is constrained by photon-number statistics. Such constraints are natural and practical control…

quant-ph2024

No quantum advantage for violating fixed-order inequalities?

Veronika Baumann, Ämin Baumeler, Eleftherios-Ermis Tselentis

In standard quantum theory, the causal relations between operations are fixed. One can relax this notion by allowing for dynamical arrangements, where operations may influence the…

quant-ph2024

Generalizing Bell nonlocality without global causal assumptions

Ravi Kunjwal, Ognyan Oreshkov

Bell scenarios are multipartite scenarios that exclude any communication between parties. This constraint leads to a strict hierarchy of correlation sets in such scenarios, namely,…

quant-ph2024

New random compiler for Hamiltonians via Markov Chains

Benoît Dubus, Joseph Cunningham, Jérémie Roland

Many quantum algorithms, such as adiabatic algorithms (e.g. AQC) and phase randomisation, require simulating Hamiltonian evolution. In addition, the simulation of physical systems…

quant-ph2024★ 2 cited

Unstructured Adiabatic Quantum Optimization: Optimality with Limitations

Arthur Braida, Shantanav Chakraborty, Alapan Chaudhuri +4

In the circuit model of quantum computing, amplitude amplification techniques can be used to find solutions to NP-hard problems defined on -bits in time …

quant-ph2024★ 1 cited

Wigner entropy conjecture and the interference formula in quantum phase space

Zacharie Van Herstraeten, Nicolas J. Cerf

Wigner-positive quantum states have the peculiarity to admit a Wigner function that is a genuine probability distribution over phase space. The Shannon differential entropy of the…

quant-ph2024★ 2 cited

Certifying nonlocal properties of noisy quantum operations

Albert Rico, Moisés Bermejo Morán, Fereshte Shahbeigi +1

Certifying quantum properties from the probability distributions they induce is an important task for several purposes. While this framework has been largely explored and used for…

quant-ph2024★ 1 cited

Detecting quantum resources in a semi-device independent framework

Shubhayan Sarkar, Chandan Datta

We investigate whether one can detect the presence of a quantum resource in some operational task or equivalently whether every quantum resource provides an advantage over its free…

quant-ph2024★ 2 cited

Witnessing network steerability of every bipartite entangled state without inputs

Shubhayan Sarkar

Quantum steering is an asymmetric form of quantum nonlocality where one can detect whether a measurement on one system can steer or change another distant system. It is well-known…

quant-ph2024★ 3 cited

Equilibrium Propagation: the Quantum and the Thermal Cases

Serge Massar, Bortolo Matteo Mognetti

Equilibrium propagation is a recently introduced method to use and train artificial neural networks in which the network is at the minimum (more generally extremum) of an energy fu…

quant-ph2024★ 7 cited

Information capacity of quantum communication under natural physical assumptions

Jef Pauwels, Stefano Pironio, Armin Tavakoli

The quantum prepare-and-measure scenario has been studied under various physical assumptions on the emitted states. Here, we first discuss how different assumptions are conceptuall…

quant-ph2024★ 2 cited

Detecting single photons is not always necessary to evidence interference of photon probability amplitudes

Eric Lantz, Fabrice Devaux, Serge Massar

Subtracting accidental coincidences is a common practice quantum optics experiments. For zero mean Gaussian states, such as squeezed vacuum, we show that if one removes accidental…

quant-ph2024★ 20 cited

Fermionic tensor network methods

Quinten Mortier, Lukas Devos, Lander Burgelman +5

We show how fermionic statistics can be naturally incorporated in tensor networks on arbitrary graphs through the use of graded Hilbert spaces. This formalism allows to use tensor…

quant-ph2024★ 16 cited

Device-Independent Quantum Key Distribution Based on Routed Bell Tests

Tristan Le Roy-Deloison, Edwin Peter Lobo, Jef Pauwels +1

Photon losses are the main obstacle to fully photonic implementations of device-independent quantum key distribution (DIQKD). Motivated by recent work showing that routed Bell scen…

quant-ph2024★ 4 cited

Joint-measurability and quantum communication with untrusted devices

Michele Masini, Marie Ioannou, Nicolas Brunner +2

Photon loss represents a major challenge for the implementation of quantum communication protocols with untrusted devices, e.g. in the device-independent (DI) or semi-DI approaches…

quant-ph2024★ 1 cited

One-sided DI-QKD secure against coherent attacks over long distances

Michele Masini, Shubhayan Sarkar

Quantum Key Distribution (QKD) is a technique enabling provable secure communication but faces challenges in device characterization, posing potential security risks. Device-Indepe…