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quant-ph2026

Long-Lived Mechanically-Detected Molecular Spins for Quantum Sensing

Sahand Tabatabaei, Pritam Priyadarsi, Daniel Tay +4

Quantum sensors based on individual spins provide unprecedented access to local magnetic fields in condensed matter, chemistry, and biology, with solid-state defect spins emerging…

quant-ph2026★ 1 cited

Reply to Comment on "Properties and dynamics of generalized squeezed states"

Sahel Ashhab, Mohammad Ayyash

In our paper [1], our numerical simulations showed that, unlike displacement and conventional squeezing, higher-order squeezing exhibits oscillatory dynamics. Subsequently, Gordill…

quant-ph2026

Cosmological Expansion Induces Interference Between Communication and Entanglement Harvesting

Matheus H. Zambianco, Adam Teixidó-Bonfill, Eduardo Martín-Martínez

We investigate the interplay between genuine entanglement harvesting and communication mediated correlations for local particle detectors in expanding cosmological spacetimes. Focu…

quant-ph2026★ 13 cited

Device-independent quantum key distribution over 100 km with single atoms

Bo-Wei Lu, Chao-Wei Yang, Run-Qi Wang +15

Device-independent quantum key distribution (DI-QKD) is a key application of the quantum internet. We report the realization of DI-QKD between two single-atom nodes linked by 100-k…

quant-ph2026

Semidefinite programming for understanding the limitations of Lindblad equations

Soumyadeep Sarma, Manas Kulkarni, Archak Purkayastha +1

Lindbladian quantum master equations (LEs) are the most popular descriptions for quantum systems weakly coupled to baths. But, recent works have established that in many situations…

quant-ph2025

Network-Irreducible Multiparty Entanglement in Quantum Matter

Liuke Lyu, Pedro Lauand, William Witczak-Krempa

We show that the standard approach to characterize collective entanglement via genuine multiparty entanglement (GME) leads to an area law in ground and thermal Gibbs states of loca…

quant-ph2025★ 1 cited

Stochastic Schrödinger Equations for Quantum Reverse Diffusion

Einar Gabbassov

The ensemble-averaged dynamics of open quantum systems are typically irreversible. We show that this irreversibility need not hold at the level of individually monitored quantum tr…

quant-ph2025

Moments of Quantum Channel Ensembles

Matthew Duschenes, Diego García-Martín, Zoë Holmes +1

Moments of ensembles of unitaries play a central role in quantum information theory as they capture the statistical properties of dynamics of systems with some form of randomness.…

quant-ph2025

Modeling of simple bandpass filters: bandwidth broadening of Josephson parametric devices due to non-Markovian coupling to dressed transmission-line modes

Rui Yang, Zheng Shi, Zhirong Lin +1

Josephson parametric devices are widely used in superconducting quantum computing research but suffer from an inherent gain-bandwidth trade-off. This limitation is partly overcome…

quant-ph2025

Can outcome communication explain Bell nonlocality?

Carlos Vieira, Carlos de Gois, Pedro Lauand +3

A central aspect of quantum information is that correlations between spacelike separated observers sharing entangled states cannot be reproduced by local hidden variable (LHV) mode…

quant-ph2025

Fault-tolerant transformations of spacetime codes

Arthur Pesah, Austin K. Daniel, Ilan Tzitrin +1

Recent advances in quantum error-correction (QEC) have shown that it is often beneficial to understand fault-tolerance as a dynamical process, a circuit with redundant measurements…

quant-ph2025

On the hardness of approximating minimum distances of quantum codes

Elena Grigorescu, Vatsal Jha, Eric Samperton

The problem of computing distances of error-correcting codes is fundamental in both the classical and quantum settings. While hardness for the classical version of these problems h…

quant-ph2025★ 5 cited

Quantum signatures of proper time in optical ion clocks

Gabriel Sorci, Joshua Foo, Dietrich Leibfried +2

Optical clocks based on atoms and ions probe relativistic effects with unprecedented sensitivity by resolving time dilation due to atom motion or different positions in the gravita…

quant-ph2025★ 1 cited

Quantum logic operations and algorithms in a single 25-level atomic qudit

Pei Jiang Low, Nicholas C. F. Zutt, Gaurav A. Tathed +1

Scaling quantum computers remains a substantial scientific and technological challenge. Leveraging the full range of intrinsic degrees of freedom in quantum systems offers a promis…

quant-ph2025★ 3 cited

Probing Defects with Quantum Simulator Snapshots

Abhijat Sarma, Nayan Myerson-Jain, Yue Liu +4

Snapshots, i.e. projective measurements of local degrees of freedom, are the most standard data taken in experiments on quantum simulators. Snapshots are usually used to probe loca…

quant-ph2025

Multimode rotationally symmetric bosonic codes from group-theoretic construction

Rabsan Galib Ahmed, Adithi Udupa, Giulia Ferrini

We introduce a new family of multi-mode, rotationally symmetric bosonic codes inspired by the group-theoretic framework of [Phys. Rev. Lett. 133, 240603 (2024)]. Such a constructio…

quant-ph2025

Contextuality from the vacuum

Caroline Lima, María Rosa Preciado-Rivas, Sanchit Srivastava

Contextuality, a key resource for quantum advantage, describes systems in which the outcome of a measurement is not independent of other compatible measurements, in contrast to cla…

quant-ph2025★ 1 cited

Time-resolved certification of frequency-bin entanglement over multi-mode channels

Stéphane Vinet, Marco Clementi, Marcello Bacchi +7

Frequency-bin entangled photons can be efficiently produced on-chip which offers a scalable, robust and low-footprint platform for quantum communication, particularly well-suited f…

quant-ph2025★ 2 cited

Quantum recurrences and the arithmetic of Floquet dynamics

Amit Anand, Dinesh Valluri, Jack Davis +1

The Poincaré recurrence theorem shows that conservative systems in a bounded region of phase space eventually return arbitrarily close to their initial state after a finite amount…

quant-ph2025

Qubit encodings for lattices of dipolar planar rotors

Muhammad Shaeer Moeed, James Brown, Alexander Ibrahim +2

Near term quantum devices have recently garnered significant interest as promising candidates for investigating difficult-to-probe regimes in many-body physics. To this end, variou…

quant-ph2025

Analytic Rényi Entropy Bounds for Device-Independent Cryptography

Thomas A. Hahn, Aby Philip, Ernest Y. -Z. Tan +1

Device-independent (DI) cryptography represents the highest level of security, enabling cryptographic primitives to be executed safely on uncharacterized devices. Moreover, with su…

quant-ph2025★ 1 cited

Security of quantum key distribution with source and detector imperfections through phase-error estimation

Guillermo Currás-Lorenzo, Margarida Pereira, Shlok Nahar +1

Quantum key distribution promises information-theoretic security, but practical implementations face vulnerabilities due to device imperfections. Existing security proofs typically…

quant-ph2025★ 1 cited

Engineering Precise and Robust Effective Hamiltonians

Jiahui Chen, David Cory

Engineering effective Hamiltonians is essential for advancing quantum technologies including quantum simulation, sensing, and computing. This paper presents a general framework for…

quant-ph2025

Scalable Simulation of Fermionic Encoding Performance on Noisy Quantum Computers

Emiliia Dyrenkova, Raymond Laflamme, Michael Vasmer

A compelling application of quantum computers with thousands of qubits is quantum simulation. Simulating fermionic systems is both a problem with clear real-world applications and…