Roman Lutchyn’s Post

New from #OPG_OpticaQ, Chip-based phonon splitter brings hybrid quantum networks closer to reality: https://bit.ly/3KFOZUB This coupler acts like a junction in a quantum ‘postal route to split, route or recombine single quantum vibrations so that an excitation created in one processor can be sent reliably to another processor on the same chip or to multiple recipients. The device could enable microscopic on-chip routers and splitters that link different types of quantum technologies. Delft University of Technology #Quantum #QuantumNetworks #ScienceAndTechnology

🌟 New milestone in quantum photonics! Chiara Michelini, Stefano Signorini, Valerio Pruneri and I have demonstrated the first on-chip quantum phase sensing with undetected photons. Using a silicon SU(1,1) interferometer, we measured the phase of 1972 nm signal photons by only detecting their 1291 nm partners. This breakthrough paves the way for scalable quantum refractometric sensors with applications in precision measurement, metrology, and biomedical imaging. 🔬 What we achieved: Our team experimentally demonstrated the first on-chip quantum phase sensing with undetected photons. Using an innovative integrated SU(1,1) interferometer—based on transverse waveguide modes—we harnessed intermodal spontaneous four-wave mixing to create highly non-degenerate photon pairs. Instead of directly measuring the signal photons (at 1972 nm), we successfully retrieved their phase information by only detecting the correlated idler photons (at 1291 nm). ✨ Why it matters: This approach enables quantum phase measurements without ever detecting the photons carrying the phase change. Such a technique opens new avenues for quantum refractometric sensors—devices that could impact precision measurements in sensing, metrology, and biomedical imaging, all integrated on scalable silicon platforms. 💡 The bigger picture: Expands the toolkit for quantum photonic chips. Brings us closer to practical quantum sensors leveraging invisible light. Demonstrates the power of silicon photonics for next-gen quantum technologies. We believe this is an exciting step toward a future where quantum sensing is compact, scalable, and transformative across industries. #QuantumPhotonics #QuantumSensing #SiliconPhotonics #QuantumTechnology #PhotonicsResearch #IntegratedPhotonics #QuantumEngineering https://lnkd.in/dq9K5shS

Hello, Los Angeles! 𝗗𝗼 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄 𝘄𝗵𝗮𝘁’𝘀 𝗵𝗼𝗹𝗱𝗶𝗻𝗴 𝘀𝗽𝗶𝗻 𝗾𝘂𝗯𝗶𝘁𝘀 𝗯𝗮𝗰𝗸 𝗳𝗿𝗼𝗺 𝗳𝘂𝗹𝗹𝘆 𝗿𝗲𝗮𝗹𝗶𝘇𝗶𝗻𝗴 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗾𝘂𝗮𝗻𝘁𝘂𝗺 𝗰𝗼𝗺𝗽𝘂𝘁𝗶𝗻𝗴? Physical shuttling of qubits via conveyor-mode shuttling offers a path to enhanced processor connectivity with high-fidelity, long-distance transfer. But its reliance on analog signal quality, waveform generators and multi-channel synchronization presents a major scalability bottleneck due to storage requirements and compilation overhead. 𝗤𝗯𝗹𝗼𝘅 𝗶𝘀 𝗽𝗿𝗲𝘀𝗲𝗻𝘁𝗶𝗻𝗴 𝘁𝗵𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻 𝘁𝗼𝗱𝗮𝘆 𝗮𝘁 𝘁𝗵𝗲 𝗳𝗶𝗿𝘀𝘁 𝗽𝗼𝘀𝘁𝗲𝗿 𝘀𝗲𝘀𝘀𝗶𝗼𝗻 𝗼𝗳 𝗦𝗜𝗤𝗘𝗪 𝟮𝟬𝟮𝟱: 📅 Monday, October 6, 2025 🕠 16:00–18:00 PDT 📍 Terranea Resort, Rancho Palos Verdes, CA 👤 Presenter: Yemliha Bilal Kalyoncu 📃 Poster Title: Spin shuttling with gapless scheduling of real-time parametrized pulses How Qblox solves it: ✔️ 𝗖𝗼𝗵𝗲𝗿𝗲𝗻𝘁 𝗰𝗼𝗻𝘁𝗿𝗼𝗹 𝘄𝗶𝘁𝗵 𝗿𝗲𝗮𝗹-𝘁𝗶𝗺𝗲 𝗽𝘂𝗹𝘀𝗲 𝗽𝗮𝗿𝗮𝗺𝗲𝘁𝗿𝗶𝘇𝗮𝘁𝗶𝗼𝗻 ✔️ 𝗦𝗶𝗴𝗻𝗮𝗹 𝗶𝗻𝘁𝗲𝗴𝗿𝗶𝘁𝘆 𝗮𝗻𝗱 𝗮𝗻𝗮𝗹𝗼𝗴 𝗽𝗿𝗼𝗽𝗲𝗿𝘁𝗶𝗲𝘀 ✔️ 𝗛𝗶𝗴𝗵 𝗳𝗶𝗱𝗲𝗹𝗶𝘁𝘆 𝗿𝗲𝗮𝗱𝗼𝘂𝘁 ✔️ 𝗠𝘂𝗹𝘁𝗶-𝗰𝗵𝗮𝗻𝗻𝗲𝗹 𝘀𝘆𝗻𝗰𝗵𝗿𝗼𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻 Come by to hear how each of these solutions can help break the bottleneck in scaling spin qubits. #Qblox #QuantumHardware #QuantumControl #SpinQubits #SiQEW2025

𝐃𝐨𝐞𝐬 𝐭𝐡𝐞 𝐰𝐨𝐫𝐥𝐝 𝐧𝐞𝐞𝐝 𝐐𝐏𝐔𝐬 𝐰𝐢𝐭𝐡 𝐫𝐞𝐬𝐨𝐧𝐚𝐭𝐨𝐫 𝐦𝐨𝐝𝐞𝐬? While much of quantum computing research currently focuses on pure qubit systems, there is growing interest in quantum processing units (QPUs) that incorporate resonators - or bosonic modes, as I found during a recent talk. Why is this exciting? In resonator-based architectures, you can place several bosons into a single resonator. For example, in the scheme shown in the picture there are four distinct energy levels that can be occupied in one resonator. This might be beneficial for simulations of transport systems in solar panels, photosynthesis, and in general, whenever a particle is found to be in an environment (like almost everything in the world). Currently, we often model these spin-boson systems by fitting the bosonic environment sothat we can use qubits to simulate the environment. One example is the “bath fitter” functionality in the HQS Noise App, which translates bosonic part into a qubit-compatible description. As you might guess, this is not very efficient. Simulating bosonic environments with actual bosonic resonators would be more natural; then you’d need qubits only for the system, not the environment. Of course, there’s a long way to go. As demonstrated by colleagues of mine in collaboration with IQM Quantum Computers (arXiv:2503.11507) a possible qubit-resonator gate is the Jaynes-Cummings gate. Fun fact: a Jaynes-Cummings gate with a fixed angle reduces to an iSWAP gate. This collaboration led to a co-design based on the IQM Deneb Chip. If you’re interested in learning more, check out the paper arXiv:2503.11507 or feel free to reach out! #QuantumComputing #QPU #BosonicModes #Resonators #QuantumSimulation #SpinBosonModels

Quantum Thermometric Sensing Achieves Precision Bounds Via Coupled Qubits and Fisher Information Analysis Researchers demonstrate a highly sensitive temperature sensor using coupled quantum bits, revealing that direct measurement of the sensor outperforms remote readings and that optimising the connection between the quantum bits significantly improves its ability to detect minute temperature changes. #quantum #quantumcomputing #technology https://lnkd.in/eJ5sYrUD

𝐀 𝐁𝐚𝐭𝐭𝐥𝐞 𝐨𝐟 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞𝐬 𝐢𝐧 𝐐𝐮𝐚𝐧𝐭𝐮𝐦 𝐂𝐨𝐦𝐩𝐮𝐭𝐢𝐧𝐠: The competition extends beyond capital to a fundamental battle of technological architectures. Quantum Computing Inc. is betting on quantum photonics and its TFLN chips, which it believes will offer advantages in scalability, energy efficiency, and room-temperature operation. IonQ, in contrast, uses a trapped-ion approach, which has demonstrated remarkable high fidelity and recently achieved a record algorithmic qubit score of #AQ 64. This milestone effectively doubles the useful computational space for certain algorithms. D-Wave, a pioneer in the field, has specialized in quantum annealing, a different approach tailored for optimization problems. D-Wave's strategy focuses on delivering "near-term quantum utility" and generating an income stream today, a direct contrast to the long-term, universal computing ambitions of its rivals. This "battle of architectures" is a crucial risk factor for all companies, as a breakthrough by one technology could potentially render another obsolete. More info at: https://lnkd.in/erXPBDgz

Entanglement Dynamics in Two-qubit Superconducting Qubits Reveal non-Markovian Effects on Gate Performance Researchers demonstrate that subtle connections between quantum bits and their surrounding environment significantly impact the reliability of quantum computations, revealing the importance of accounting for environmental ‘memory effects’ when designing future quantum devices. #quantum #quantumcomputing #technology https://lnkd.in/eGmZdFTB

"Quantum entanglement can’t beat the speed-of-light limit, but it can still make some wild things work. This includes quantum-enhanced sensors to improve applications in medicine and environmental monitoring, and in precision measurements such as the gravitational wave detector LIGO in the United States."

🚀 New from RedWave Labs: The Q420 Time Tagger We’re excited to share our latest paper on the Q420 — a calibration-free, high-precision time tagger designed for demanding quantum and photonics experiments. With ≤11.2 ps single-shot precision, 500 Megatags/s throughput, and true PXIe scalability, the Q420 redefines timing stability and reliability for QKD, quantum computing, and photon correlation setups. Learn more: https://lnkd.in/dwEGV89m #Quantum #Timing #PXIe #timetagger #QKD #PhotonCounting #CoincidenceCounting #QuantumComputing #Spectroscopy #QuantumOptics #TCSPC #FLIM

Introducing the 𝗤𝟰𝟮𝟬 𝗧𝗶𝗺𝗲 𝗧𝗮𝗴𝗴𝗲𝗿 𝗯𝘆 𝗥𝗲𝗱𝗪𝗮𝘃𝗲 𝗟𝗮𝗯𝘀 - a calibration-free, high-precision timing solution for quantum and photonics experiments. #Quantum #Timing #PXIe #timetagger #QKD #PhotonCounting #CoincidenceCounting #QuantumComputing #Spectroscopy #QuantumOptics #TCSPC #FLIMag