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| | 1 | Experimental study of time-dependent side channels in quantum key distribution
2025-04-30 | | Author(s): Hao Tan, Weiyang Zhang, Liying Han, Sheng-Kai Liao, and Feihu Xu
Quantum key distribution allows remote parties to share secret keys with proven security. However, in most systems, these schemes will also modulate light that gets leaked between the signal pulses, resulting in time-dependent side channels. Here, the authors experimentally study practical quantum key distribution with these side channels, analyzing the security risks and the corresponding countermeasures. 
[Phys. Rev. A 111, 042622] Published Mon Apr 28, 2025
| | | 2 | Resonant stroboscopic Rydberg dressing: Electron-motion coupling and multibody interactions
2025-04-30 | | Author(s): Chris Nill, Sylvain de Léséleuc, Christian Groß, and Igor Lesanovsky
Recent experiments demonstrate that stroboscopic Rydberg dressing offers advantages over the conventional dressing approach. In this work, the authors develop analytical models for two stroboscopic dressing protocols—non-adiabatic and adiabatic—that reveal the natural emergence of electron-motion coupling and multibody interactions in these systems. 
[Phys. Rev. A 111, L041104] Published Tue Apr 29, 2025
| | | 3 | Optimal connectivity from idle-qubit residual-coupling crosstalk in a cavity-mediated entangling gate
2025-04-30 | | Author(s): A. Mammola, M. M. Desjardins, and Q. Schaeverbeke
Quantum processors operated through long-range interaction mediated by a microwave resonator have been envisioned to allow for high connectivity. The ability to selectively operate qubits rely on the possibility to dynamically suppress the coupling between each qubit and the resonator, however, ther…
[Phys. Rev. A 111, 042621] Published Mon Apr 28, 2025
| | | 4 | Smolyak-algorithm-assisted robust control of quantum systems with uncertainties
2025-04-30 | | Author(s): Zigui Zhang, Zibo Miao, and Xiu-Hao Deng
Efficient and systematic numerical methods for robust control design are crucial in quantum systems due to inevitable uncertainties or disturbances. We propose an approach that models uncertainties as random variables and quantifies robustness using the expectation of infidelity by reformulating it …
[Phys. Rev. A 111, 042624] Published Mon Apr 28, 2025
| | | 5 | Compatibility of quantum measurements and the emergence of classical objectivity
2025-04-30 | | Author(s): Emery Doucet and Sebastian Deffner
The study of measurements in quantum mechanics exposes many of the ways in which the quantum world is different. For example, one of the hallmarks of quantum mechanics is that observables may be incompatible, implying among other things that it is not always possible to find joint probability distri…
[Phys. Rev. A 111, 042217] Published Mon Apr 28, 2025
| | | 6 | Simulating quantum-classical interfaces via the Lindblad master equation
2025-04-30 | | Author(s): Ali Passian, Joel Dawson, Stacy Prowell, and Warren Grice
In hybrid quantum systems, the interface between quantum and classical domains is essential for the generation, control, and measurement of quantum states. Quantum-classical interfaces (QCIs) are ubiquitous in devices such as optical modulators, quantum sensors, and signal processors, where classica…
[Phys. Rev. A 111, 042626] Published Tue Apr 29, 2025
| | | 7 | Zeno-effect computation: Opportunities and challenges
2025-04-30 | | Author(s): Jesse Berwald, Nicholas Chancellor, and Raouf Dridi
Adiabatic quantum computing has demonstrated how the quantum Zeno effect can be used to construct quantum optimizers. However, much less work has been done to understand how more general Zeno effects could be used in a similar setting. We use a construction based on three-state systems rather than d…
[Phys. Rev. A 111, 042623] Published Mon Apr 28, 2025
| | | 8 | Biasing quantum trajectories for enhanced sensing
2025-04-30 | | Author(s): Theodoros Ilias
Quantum continuous measurement strategies are an essential element in many modern sensing technologies, leading to potentially enhanced estimation of unknown physical parameters. In such schemes, continuous monitoring of the quantum system, which encodes the parameters of interest, gives rise to dif…
[Phys. Rev. A 111, 042432] Published Tue Apr 29, 2025
| | | 9 | Thermodynamic phases in first detected return times of quantum many-body systems
2025-04-30 | | Author(s): Benjamin Walter, Gabriele Perfetto, and Andrea Gambassi
The authors develop an analytical treatment of the probability of first detection of a quantum many-body state under stroboscopic projective measurements. The ensuing analysis is based on a mapping of the many-body quantum first detection probability to the partition function of classical spins and it allows to classify different asymptotic decays of the former in terms of equilibrium thermodynamic phases of the latter. 
[Phys. Rev. A 111, L040202] Published Mon Apr 28, 2025
| | | 10 | Influence of the impact parameter for ionization of argon by fast positrons and electrons on the postcollision kinematics and triply differential spectra
2025-04-30 | | Author(s): R. D. DuBois and K. Tőkési
Classical trajectory Monte Carlo calculations for fast positron and electron impact ionization of argon are used to provide information about how the pre- and postcollision kinematics alter the triply differential spectra. It is shown that in addition to the scattering direction expected for a posit…
[Phys. Rev. A 111, 042826] Published Mon Apr 28, 2025
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