Zero Point Cryogenics’ Post

Check out our newest paper! 🎉 We've explored a new frontier in high harmonic generation (HHG) by driving the process with quantum light, such as squeezed coherent states. Our findings show that HHG under these conditions produces quantum high harmonics, with their quantum state directly influenced by the light's photon statistics. This breakthrough could lead to the generation of squeezed extreme-ultraviolet pulses and open up new possibilities for quantum frequency conversion and ultrasensitive attosecond metrology 💪 Link to the paper: https://shorturl.at/rTaoO

Check out our recent preprint, where we present a novel bosonic quantum control in driven superconducting circuits in the fluxonium regime. We also show how flux noise can be dynamically controlled by tuning the Floquet drive. https://lnkd.in/gKNtC4Sc

Our proposal can be implemented with state-of-the-art opto-mechanical systems. It paves the way toward the experimental demonstration of fluctuation theorems in quantum open systems. Discussion Originally, our proposal sheds new light on absolute irreversibility, which quantifies information extraction within the quantum work meter and therefore signals the success of the protocol. Recently, small amounts of average work have been directly measured, by monitoring the resonant field coherently driving a superconducting qubit.55 Generalizing our formalism to this experimental situation would relate measurable work fluctuations to quantum entropy production, opening a new chapter in the study of quantum fluctuation theorems. https://lnkd.in/gU_RY__2

Entangled OAM photons are essential for their use in free-space photonic quantum key distribution and weak-value measurements. Our latest work on stimulated emission tomography (SET) has inspired a highly-efficient classical method to measure a quantum two-photon wavefunction in LG modes. Please check this exciting work here: https://lnkd.in/e6q2nw5v

Sharing my latest research on micro-ring resonator photon-pair generation via Spontaneous Four Wave Mixing (SFWM).

The latest iteration of my talk on X-band clock transition in Pr(II). Collaboration of National High Magnetic Field Laboratory with Berkeley Lab and UC Irvine. Read more here: https://lnkd.in/e-gCKr3a #SERMACS2024

Investigation of quantum vacuum birefringence using an X-ray dark-field technique New video from the series of interviews with users of the European XFEL According to quantum field theory, the #vacuum is not really "empty". For example, it can interact with strong electromagnetic fields. This extremely weak effect should be visible in the scattering of X-ray photons in the optical field of strong #lasers. As part of the #HIBEF collaboration at the #HED experiment station of European XFEL in #Schenefeld near #Hamburg, a team led by Thomas E. Cowan from #Helmholtz-Zentrum #Dresden-Rossendorf (#HZDR) is investigating whether this can be measured. https://lnkd.in/eiMnPM_2

In collaboration with the Paul Scherrer Institute, the University of Cambridge and others, we've published a new paper in Physical Review Accelerators and Beams, reporting experimental results of a YBCO bulk superconducting undulator magnetic optimisation. The magnetic field optimisation of RE-Ba-Cu-O (REBCO, RE=rare earth) bulk superconducting undulators is a fundamental step toward their implementation in an accelerator driven photon source, like a synchrotron or a free electron laser. We propose a sorting algorithm to reduce the undulator’s phase error based on the reconstruction of the trapped current inside the bulks of a staggered array undulator. The results obtained with a YBCO short prototype field-cooled down to 10 K in a 10 T magnetic field are reported, which suggest a potential improvement in the homogeneity of the on-axis undulator field of a full scale prototype by more than an order of magnitude. The paper can be downloaded, open access, here: https://lnkd.in/eYFN_C2E

Our latest paper, "Experimental electronic stopping cross section of titanium for slow hydrogen, deuterium, and helium ions," is out now! Using Time-of-Flight Low-Energy Ion Scattering, we've measured energy loss for light ions (slower than ever before!) in Ti and compared it with past data and models. Check it out for fresh insights into electronic stopping! https://lnkd.in/dRzTEvmX

New preprint out: This one took a long time & ended up being much longer than anticipated, but we are back to quantum effects & correlated two-electron systems (laser-induced nonsequential double ionization -- NSDI). Contains intra-channel interference conditions in NSDI that can be applied to arbitrary driving fields. https://lnkd.in/eqHWrY9J