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| | 1 | Ionization Energy of Metastable $^{3}\mathrm{He}$ (2 $^{3}{S}_{1}$) and the Alpha- and Helion-Particle Charge-Radius Difference from Precision Spectroscopy of the $np$ Rydberg Series
2025-06-03 | | Author(s): Gloria Clausen and Frédéric Merkt
New physics may explain discrepant values for the ionization energy of a metastable state of helium. 
[Phys. Rev. Lett. 134, 223001] Published Mon Jun 02, 2025
| | | 2 | Autonomous coarse-grained cooling of the coldest reservoir not restricted by the second law of thermodynamics
2025-06-03 | | Author(s): I. V. Vovchenko, A. A. Zyablovsky, A. A. Pukhov, and E. S. Andrianov
Nonequilibrium quantum thermodynamics is an intensively developing field with many applications. We study the dynamics of temperatures and chemical potentials of fermionic reservoirs coupled to an open quantum system on a coarse-grained timescale. We show that systematic heat transfer from the cold …
[Phys. Rev. A 111, 062204] Published Mon Jun 02, 2025
| | | 3 | Phase diagram of the Schwinger model by adiabatic preparation of states on a quantum simulator
2025-06-03 | | Author(s): Oleg Kaikov, Theo Saporiti, Vasily Sazonov, and Mohamed Tamaazousti
We argue the feasibility of studying the phase structure of a quantum physical system on quantum devices via adiabatic preparation of states. We introduce a method and successfully test it in application to the Schwinger model in the presence of a topological $θ$ term. We explore the first-order-pha…
[Phys. Rev. A 111, 062202] Published Mon Jun 02, 2025
| | | 4 | Quantum information with quantumlike bits
2025-06-03 | | Author(s): Graziano Amati and Gregory D. Scholes
In previous work we proposed a construction of quantum-like bits that could endow a large synchronizing classical system, for example, of oscillators, with quantum-like function that is not compromised by decoherence. In the present paper we investigate further this platform of quantum-like states. …
[Phys. Rev. A 111, 062203] Published Mon Jun 02, 2025
| | | 5 | Electronic emission in a single ion-nanoparticle collision
2025-06-03 | | Author(s): Thibault Nguyen Trung, Michel Du Chalard, Marin Chabot, Olivier Sublemontier, Emmanuel Dartois, Thomas Pino, Isabelle Ribaud, Benoit Gervais, Eric Giglio, Jean Duprat, and Karine Béroff
The authors experimentally and theoretically study the size effects on the electron emission from polystyrene nanoparticles collided by fast ions. They employ a crossed-beam setup to measure the charge-state distributions of nanoparticles following collisions with a wide range of ions. 
[Phys. Rev. A 111, 062801] Published Mon Jun 02, 2025
| | | 6 | Determination of quantum defects and core polarizability of atomic cesium via terahertz and radio-frequency spectroscopy in thermal vapor
2025-06-03 | | Author(s): Gianluca Allinson, Lucy A. Downes, C. Stuart Adams, and Kevin J. Weatherill
We present new measurements of quantum defects and core polarizabilities in cesium ($^{133}\mathrm{Cs}$), based on transition frequency measurements between Rydberg states ($14≤n≤38$) obtained through THz and radio-frequency spectroscopy in a thermal atomic vapor. We perform a global fitting of our …
[Phys. Rev. A 111, 062802] Published Mon Jun 02, 2025
| | | 7 | Minimum optical depth multiport interferometers for approximating arbitrary unitary operations and pure states
2025-06-03 | | Author(s): Luciano Pereira, Alejandro Rojas, Gustavo Lima, Aldo Delgado, Gustavo Cañas, and Adán Cabello
Reconfigurable devices which can implement arbitrary unitary operations are crucial for photonic quantum computation, optical neural networks, and boson sampling. Here, we address the problem of, using multiport interferometers, approximating with a given infidelity any pure-state preparation and an…
[Phys. Rev. A 111, 062603] Published Mon Jun 02, 2025
| | | 8 | Perturbation-theory approach for predicting vibronic selectivity by entangled-photon-pair absorption
2025-06-03 | | Author(s): C. D. Rodríguez-Camargo, H. Ó. Gestsson, C. Nation, A. R. Jones, and A. Olaya-Castro
Using second-order perturbation theory in the light-matter interaction, we derive an analytical approximation for the vibronic populations of a diatomic system excited by ultrabroadband frequency-entangled photons and evaluate the population dynamics for different degrees of entanglement between pho…
[Phys. Rev. A 111, 063101] Published Mon Jun 02, 2025
| | | 9 | Quantum error mitigation for rotation-symmetric bosonic codes with symmetry expansion
2025-06-03 | | Author(s): Suguru Endo, Yasunari Suzuki, Kento Tsubouchi, Rui Asaoka, Kaoru Yamamoto, Yuichiro Matsuzaki, and Yuuki Tokunaga
The rotation symmetric bosonic code (RSBC) is a unified framework of practical bosonic codes that have rotation symmetries, such as cat codes and binomial codes. While cat and binomial codes achieve the breakeven point in which the coherence time of the encoded qubits exceeds that of unencoded qubit…
[Phys. Rev. A 111, 062402] Published Mon Jun 02, 2025
| | | 10 | Thermodynamics of coherent energy exchanges between lasers and two-level systems
2025-06-03 | | Author(s): Ariane Soret and Massimiliano Esposito
We study the quantum thermodynamics of a coherent macroscopic electromagnetic field (laser) coupled to a two-level system (qubit) near resonance, from weak- to strong-driving regimes. This combined system is, in turn, weakly coupled to a thermal radiation field and can be described by an autonomous …
[Phys. Rev. A 111, 062205] Published Mon Jun 02, 2025
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