Welcome to Loh Lab @ CQT

Our lab at the Centre for Quantum Technologies, National University of Singapore, is interested in using arrays of tweezer-trapped atoms as quantum "lego" blocks to simulate advanced materials.

Understanding our research focus

Quantum simulation is the modeling of nature with quantum building blocks like atoms and molecules.

Quantum simulation allows us to study interesting quantum materials while working towards building powerful computers.

Arrays of optical tweezers provide a powerful platform for controlling individual quantum building blocks in a scalable manner.

Atoms, molecules, lasers, microwaves, electric fields, magnetic fields, some epic code, and a huge dose of fun!

Our research highlights

Our team develops methods to scale up atom arrays, a promising platform for quantum computation and simulation. These include using D1 magic wavelengths to enable efficient imaging and demonstrating a new parallel atom-rearrangement algorithm. With the latter, we realized large defect-free arrays with hundreds of singly-trapped atoms in arbitrary geometries.

Meet the team

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News Updates

Sep 2022

Our manuscript reporting a new algorithm to efficiently assemble large-scale defect-free atom arrays is now up on the arXiv! Our parallel sort-and-compression algorithm (PSCA) offers a reduced move complexity (only scaling as the square root of the target array size) and naturally avoids collisions between atoms. Here is a defect-free image of 225 singly-trapped atoms pristinely arranged in a triangular array, obtained by applying our new algorithm.

Sep 2022

The first PhD student graduates from Loh Lab! Congratulations to Krishna for his successful defense. An exciting future awaits you with your new quantum sensors job lined up!

Aug 2022

Michael and Jiacheng (Scarlett) join us as PhD students. Michael is formerly a NUS undergraduate and Jiacheng comes from Sichuan University. We are delighted to have you both!

Jul 2022

Congratulations to Wen Jun for winning both the Lijen Industrial Development Medal and the Outstanding Undergraduate Research Prize for his honors project!

Jun 2022

Huanqian gives an invited talk at the Optica Quantum 2.0 conference.

Jun 2022

The APS annual DAMOP meeting is here! Weikun gives a contributed talk and poster on our defect-free 225-atom arrays, while Luheng presents a poster on the sodium experiment.

May 2022

Invited by Prof. Gyuboong Jo, Huanqian gives a talk at the Hong Kong University of Science and Technology (HKUST) Institute for Advanced Study-Center for Quantum Technologies (IAS CQT) seminar.

Apr 2022

A four-PI team led by Huanqian (with co-PIs Prof Gong, Prof Lee, and Prof Lim) has been awarded about SGD 3.8 million under the Singapore Quantum Engineering Program. We are ready to perform some exciting quantum simulations with our atom arrays!

Apr 2022

Huanqian gives an invited talk and chairs a session at the exciting 4th Asian-Pacific Workshop on Trapped Quantum Systems (APTQS 2022).

Mar 2022

Huanqian delivers an invited talk at the American Physical Society March Meeting. It was great to meet so many colleagues and old friends again, and to build new friendships!

Feb 2022

Our invited roadmap article on “Atom Arrays for Quantum Simulation”, as part of the “2022 Roadmap for Materials for Quantum Technologies”, is posted on the arXiv.

Jan 2022

Jeb joins our lab as an undergraduate intern. Welcome, Jeb!

Nov 2021

Huanqian gives an invited talk online at the MajuLab@Sorbonne University workshop.

Oct 2021

Our manuscript entitled ‘D1 magic wavelength tweezers for scaling atom arrays’ is published in Physical Review Research! Our work is also featured as a CQT highlight. Congrats to Mujahid, Luheng, Xiu Quan, and Krishna for working so hard to bring these results to fruition!

Sep 2021

Huanqian gives an invited talk at the 21st Asian Quantum Information Science conference.