📢 Announcement

We are seeking motivated individuals interested in quantum sensing and condensed matter physics. Check out Quantum Probes for Condensed Matter below! Contact us to learn about postdoc and PhD opportunities.

Interfacing Quantum Systems

The Quantum Systems Engineering (QSE) group is part of the Electrical and Computer Engineering department at the National University of Singapore (NUS).

We study how quantum systems behave and evolve in real-world environments. By precisely controlling quantum degrees of freedom (e.g., spins and phonons) in wide-bandgap materials, we develop innovative approaches to interface quantum systems to other scientific domains. Our research not only advances fundamental scientific understanding but also paves the way for the next generation of transformative quantum technologies.

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Quench imaging of domain walls

Our Research

Multimodal Quantum Sensing

The nitrogen-vacancy (NV) center in diamond is a spin defect that enables magnetic field sensing with nanometer-scale resolution and nanotesla sensitivity. Here we aim to develop the NV-based quantum sensing capabilities for a broad spectrum of physical phenomena (e.g., time-varying EM fields, and surface spin dynamics) in challenging real-world environments (e.g., from nanometer-scale to extreme radiation).

Quantum Probes for Condensed Matter

Solid-state materials research and development have progressed towards ever-reducing physical footprints. This is motivated by novel properties at reduced dimensions and the miniaturization of technology. We leverage on our expertise in NV-based quantum sensing and quantum control to probe emergent phenomena at the forefront of quantum materials research. Materials of interest includes 2D magnets, magnonic systems, superconductors, multiferroics, and hybrid materials.

Topological Textures

Engineering Quantum Sensors for Industries

The exceptional robustness and ability to host stable quantum defects in diamond make it a powerful platform for industrial applications. Here, we focus on novel packaging solutions and advanced reconstruction protocols to deploy NV-based sensors in real-world environments. Target applications include fusion plasma diagnostics, high-field MRI calibration, and diagnostics of critical circuitries. This interdisciplinary effort offers opportunities for industrial collaboration and IP development.

SEM Image of Diamond Tip

Highly Tunable Quantum Interfaces

Advancements in quantum technologies thus far have yielded individual quantum systems that fulfil one or few specific functionalities. For example, optical photons for transmitting quantum information, solid-state defects for storage, and superconducting circuits for processing. These platforms do not readily exchange quantum information as they are physically distinct and operate at vastly dissimilar energy scales. Our research addresses this challenge by exploring diamond as a versatile and highly tunable quantum interface capable of transducing quantum information between different quantum systems.

Exploring Photon-Phonon Interaction

With its wide bandgap, high refractive index, and exceptional acoustic velocity, diamond supports a photon-phonon interaction that is energetically tunable across a broad optical and RF spectrum. This photon-phonon interaction, known as Brillouin-Mandelstam scattering, is a promising route to transduce quantum information between otherwise incompatible systems. Moreover, achieving and controlling quantum states of massive mechanical systems is of fundamental interest, for example to probe the foundations of quantum mechanics and the nature of reality itself. This research will be pursued in collaboration with Michael Vanner in Imperial College, leaveraging on their complementary expertise in quantum optomechanics and quantum theory.

Brillouin Classical Correlation

Exploring Innovative Research Themes

Beyond our focus to interface quantum systems to condense matter, emergent industries and other quantum systems, we are continually seeking innovative interdisciplinary directions to harness quantum systems across a broader range of scientific fields and applications.

Interdisciplinary Quantum Research

We are especially excited about opportunities to intersect quantum science with biology and chemistry, which could open new frontiers in diagnostics, and the understanding of complex biological systems. Another promising direction is the use of structured light to manipulate quantum states to advance next-generation quantum sensing techniques. We welcome collaborations and new ideas to explore these possibilities together.

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Latest News

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Quantum Sensing Group is starting Q4 2025!

  • Curious about how quantum systems and wonder how they can enable transformative applications?
  • We are looking for enthusiastic individuals to join us! Please get in contact to find out more!

Our paper on quantum sensing revealing topological textures is getting attention!

  • Highlighted in several popular media and review articles. Check them out!
  • Rustland - A Tale of Flat Magnetism | Cavmag Magazine
  • Magnetic monopoles appear in haematite | Physics World
  • Can a Magnet Ever Have Only One Pole? | Scientific American
  • Naturally Occurring Magnetic Monopoles Measured For The First Time | IFL Science
  • Imaging the twist of antiferromagnetic merons in a blood-red iron oxide | Nature Materals
More news

Latest Publications

Brillouin-Mandelstam Scattering In Telecommunications Optical Fiber At Millikelvin Temperatures. APL Photonics (2025)

Something from Nothing: Enhanced Laser Cooling of a Mechanical Resonator via Zero-Photon Detection. Physical Review Letters (2025)

Something from Nothing: A Theoretical Framework for Enhancing or Enabling Cooling of a Mechanical Resonator via the anti-Stokes or Stokes Interaction and Zero-Photon Detection. Physical Review A (2025)

Evidencing Dissipation Dilution In Large-Scale Arrays Of Single-Layer WSe2 Mechanical Resonators. ACS Applied Electronic Materials (2024)
Full list

Our Team

Anthony K.C. Tan

Anthony K.C. Tan
Principal Investigator

Join Our Team

We are always looking for passionate individuals to join our research group. If you are interested in pursuing a PhD, postdoctoral position, or internship with us, please contact us at tan.anthony@nus.edu.sg.