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{
"type": "article",
"id": "https://doi.org/10.48550/arxiv.2512.16403",
"categories": [
"Optics (physics.optics)",
"Quantum Physics (quant-ph)",
"FOS: Physical sciences",
"FOS: Physical sciences"
],
"author": [
{
"family": "Edmonds",
"given": "Matthew"
},
{
"family": "Bateman",
"given": "James"
}
],
"issued": {
"date-parts": [
[
2025
]
]
},
"abstract": "Laser-induced acoustic desorption (LIAD) enables loading nanoparticles into optical traps under vacuum for levitated optomechanics experiments. Current LIAD systems rely on empirical optimization using available laboratory lasers rather than systematic theoretical design, resulting in large systems incompatible with portable or space-based applications. We develop a theoretical framework using the photoacoustic wave equation to model acoustic wave generation and propagation in metal substrates, enabling systematic optimization of laser parameters. The model identifies key scaling relationships: surface acceleration scales as $τ^{-2}$ with pulse duration, while acoustic diffraction sets fundamental limits on optimal spot size $w \\gtrsim \\sqrt{vτd}$. Material figures of merit combine thermal expansion and optical absorption properties, suggesting alternatives to traditional aluminum substrates. The framework validates well against experimental data and demonstrates that compact laser systems with sub-nanosecond pulse durations can achieve performance competitive with existing laboratory-scale implementations despite orders-of-magnitude lower pulse energies. This enables rational design of minimal LIAD systems for practical applications.",
"DOI": "10.48550/ARXIV.2512.16403",
"publisher": "arXiv",
"title": "Photoacoustic model for laser-induced acoustic desorption of nanoparticles",
"URL": "https://arxiv.org/abs/2512.16403",
"copyright": "Creative Commons Attribution 4.0 International",
"version": "1"
}
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{
"type": "article",
"id": "https://doi.org/10.48550/arxiv.2607.04966",
"categories": [
"Atomic Physics (physics.atom-ph)",
"Quantum Physics (quant-ph)",
"FOS: Physical sciences"
],
"author": [
{
"family": "Himsworth",
"given": "Matt"
},
{
"family": "Camm",
"given": "Chester"
},
{
"family": "Carey",
"given": "Max"
},
{
"family": "Saywell",
"given": "Jack"
},
{
"family": "Woods",
"given": "Jonathan"
},
{
"family": "Atkočius",
"given": "Vilius"
},
{
"family": "Concepcion",
"given": "Florence"
},
{
"family": "Karakostas",
"given": "Konstantinos"
},
{
"family": "Brady",
"given": "Hannah"
},
{
"family": "Atila",
"given": "Doruk Tan"
},
{
"family": "Heywood",
"given": "Ellie"
},
{
"family": "Jantzen",
"given": "Alex"
},
{
"family": "Dragomir",
"given": "Andrei"
},
{
"family": "Morley",
"given": "Christopher"
},
{
"family": "Bateman",
"given": "James"
}
],
"issued": {
"date-parts": [
[
2026
]
]
},
"abstract": "Laser cooled and trapped atoms have been the workhorse of atomic physics for the past four decades. The predominant method has been the highly versatile Magneto-Optical Trap. We describe an alternative laser trap involving a simple geometry of collimated laser beams that provides both a velocity and position dependent restoring force such that a dense cloud of cold atoms is formed. This technique produces similar atom number ($>10^6$) and density ($10^{10}$\\,atoms/cm$^{3}$) to the Magneto-Optical Trap, albeit with \\emph{no magnetic field}. The beam geometry is compatible with conventional sub-Doppler cooling techniques, allowing the trapped cloud to be cooled to $< 10~μ$K. We demonstrate the validity and robustness of the trap by capturing $^{87}$Rb atoms directly from the background vapor and provide a theoretical discussion of the underlying principles. This trap has many unique properties that make it highly suitable for quantum sensing, timing, and computing applications as well as a new tool in fundamental science and metrology.",
"DOI": "10.48550/ARXIV.2607.04966",
"publisher": "arXiv",
"title": "Super-molasses returns: All optical near-resonance laser cooling and trapping of neutral atoms from background vapor",
"URL": "https://arxiv.org/abs/2607.04966",
"copyright": "Creative Commons Attribution 4.0 International",
"version": "2"
}