Christel-Loic Tisse’s Post

[Scientific talk 💬] American Physical Society March Meeting, here we are! This is it, the most popular physics event! Benoît Neukelmance will present our latest amazing scientific result: Observation of microsecond lived quantum states in carbon-based circuits The talk is scheduled at 1:42 PM CST in the room 200G. The teaser 🤩 We manipulate the quantum state of a carbon nanotube double quantum dot with ferromagnetic contacts embedded in a microwave cavity. By performing quantum manipulations such as Rabi oscillations, Ramsey fringes and spin echoes, we demonstrate coherence times of the order of 1 μs, 2 orders of magnitude larger that what has been measured so far in any carbon quantum circuit and 1 order of magnitude larger than Si based quantum dots in comparable environment. This hold promises for pure isotopically purified 12C spin quantum bits in circuit quantum electrodynamics. We are thankful to the Laboratory of Physics of the École normale supérieure for this fruitful collaboration! Full authors' list here https://lnkd.in/eYkJ9aVB

Paper day is always a happy day! Especially if it comes in pairs :) The first is an extensive review of Attosecond Transient Absorption and Reflection spectroscopy of solid-state samples to study ultrafast electron dynamics. After a detailed presentation of the state of the art, we go deep into the fundamentals of both techniques, analyzing clear advantages and disadvantages, and finally concluding with challenges and future directions. https://lnkd.in/dFD8848w In the second work, we show how to use a simultaneous attosecond streaking measurement to calibrate the absolute delay of transient spectroscopy data with attosecond precision. https://lnkd.in/dy4UcZkB Check them out!

According to quantum physics, light and other electromagnetic radiation appear as quanta. Quanta are packets with fixed energies and correspond to energy transitions in atoms. In the early 2000s, John Hall (pictured) and Theodor Hänsch wondered how to measure these with better accuracy. The two developed the frequency comb technique. It uses laser light with a series of equidistant frequencies to accurately measure other frequencies. Determining these frequencies provides information about the atoms' properties, benchmarks for time and length, and the possibility of deciding physical constants. Hall and Hänsch were awarded the 2005 Nobel Prize in Physics for ”their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique.” Learn more: https://bit.ly/3pCEcjP

Two papers out on the same day! If you want to know more about attosecond transient absorption and reflection spectroscopy in solids and how we can use it to study early dynamics induced by light fields, take a look at our review in APL Photonics: https://lnkd.in/d_hVtuXe In Journal of Physics: Photonics, instead, we discuss how we calibrate the absolute delay of transient reflectivity experiments with attosecond precision by analytical fitting of streaking measurements: https://lnkd.in/dGCW-xs7 Check them out!

🔬 Join Us for an Engaging Scientific Talk! 🌟 We are excited to invite you to the upcoming SFB Colloquium featuring Prof. Dr. Tobias Stauber from the Instituto de Ciencia de Materiales de Madrid. 🗓️ Date: Tuesday, 02.07.2024 ⏰ Time: 14:15 🏢 Location: H34 Prof. Stauber will be presenting on the compelling topic of "Nematic versus Triplet Superconductivity in Twisted Bilayer Graphene." Be part of an enlightening session where we explore the phase diagrams of realistic moiré systems, starting from a microscopic tight-binding model for twisted bilayer graphene within the Hartree-Fock approximation. The talk will cover the emergent U(4)-ferromagnet, the symmetry-breaking in real samples, and how this affects the asymmetry between the superconducting phases for electron and hole doping. Additionally, the discussion will extend to the theory of Ising superconductivity in twisted trilayer graphene and how real-space chirality can be measured in linear transport experiments. This is a fantastic opportunity for anyone interested in cutting-edge research in condensed matter physics and materials science. #CondensedMatterPhysics #TwistedBilayerGraphene #NematicSuperconductivity #TripletSuperconductivity #MoiréSystems #MaterialsScience #ScientificResearch #PhysicsTalk #Colloquium #SFB1277 See you there! 🚀

Who will be at the APS Division of Atomic, Molecular and Optical Physics (DAMOP) Annual Meeting this week in Fort Worth, TX? Vescent will be! 💫 Come visit us at Booth #8. Let's talk about the latest innovations for #QuantumPhysics! Looking forward to seeing you! American Physical Society #Quantum #QuantumTechnology #QuantumComputing #DAMOP #LaserTechnology #LaserScience #AtomicClocks #OpticalClocks #AtomicPhysics #OpticalPhysics

The laser is one of the most revolutionary inventions of the 20th century, fundamentally transforming our digital world. From the fiber optic cables that form the backbone of the internet to the precision tools used in manufacturing smartphones and computers, lasers are integral to modern technology. In telecommunications, lasers enable high-speed data transmission over vast distances, allowing for the global connectivity we rely on every day. In the medical field, lasers have revolutionized surgery, enabling minimally invasive procedures with greater precision and faster recovery times. They are also used in eye surgeries like LASIK, which has improved the vision of millions of people worldwide. Lasers are at the heart of many emerging technologies as well, such as LIDAR, which is crucial for the development of autonomous vehicles, and in quantum computing, where they are used to control and manipulate qubits. The pervasive role of lasers in our digital lives cannot be overstated; they are a foundational technology driving both the present and future of innovation.i

Congratulations to my co-authors Maximilian Weissflog, Romain Dezert, Sina Sinaravi and Adrien Borne for the publication of our article Nonlinear nanoresonators for Bell state generation (https://lnkd.in/eZt9a2Dr)! In this work, featured in Applied Physics Reviews special issue on Quantum Metamaterials, we explore the possibilities offered by nonlinear nanoresonators as miniaturized sources of biphoton states with highly complex and tunable properties. Thanks to a new modeling approach, we unveil, amongst others, a regime where the generated multimode biphoton state is maximally entangled in the polarization degree of freedom, and naturally frequency entangled in a very broad spectral range. This contributes to the understanding of the physics of photon-pair generation in nanoscale systems, and stresses out that those systems are natural canditates for the future quantum technologies.

🎂 Leon Cooper was born #OnThisDay in 1930! 🎂 An American physicist, Cooper is best known for his work with John Bardeen and John Robert Schrieffer on the BCS theory of superconductivity. The trio were awarded The Nobel Prize in #Physics for this theory in 1972. He's also the source of the surname for Sheldon Cooper from the Big Bang Theory! Superconductors have zero resistance if you cool them down enough. This means they can be used to build more efficient magnets, found in MRI machines and the Large Hadron Collider at CERN. Cooper realised that when cooled to temperatures near absolute zero (-273.15°C), electrons in superconductors group into so-called ‘Cooper pairs’. These pairs move in a correlated way. If you apply an electrical current to the material, all the Cooper pairs move and form a current. When the voltage is removed, current continues to flow, and could only stop if all the pairs stopped at the same time – which is almost impossible.

The Princeton Plasma Physics Laboratory (PPPL) has once again opened a public survey to take input on the types of external communication outputs that you would find useful. PPPL engages in scientific research and technology development across a wide spectrum of plasma applications. This includes fusion energy, but extends to so much more. Find the survey link below, and let PPPL know what you would like to hear about in the coming year. #fusionenergy #science #plasma