Colored Space

Robust device-independent quantum key distribution

In our latest work, we show that DIQKD can, in fact, be made practical via a simple tweak. In employing two random key generation bases instead of one, the secure key region can be dramatically expanded to include present-day loophole-free Bell experiments. 

For more information: click here!

Quantum Cryptography

  • Secure key distribution

  • Random number generation

  • Database security

Quantum Networks

  • Signal processing

  • Integrated photonics

  • Certification and standards

Quantum Theory

  • Quantum correlations

  • Foundations

  • Quantum information theory

Our research group (Quantum X) is jointly based at the Department of Electrical & Computer Engineering of NUS and at the Centre for Quantum Technologies. Our focus is largely on quantum cryptography and we aim to bring the technology to the market. To that end, we take a two-pronged approach, investing talents and resources in both theoretical and experimental research to develop the next generational quantum-safe networks.

Quantum computers are machines that can break today’s most prevalent encryption systems in minutes. Recent progress in experimental quantum computing shows that this threat is no longer theoretical but real, and large-scale quantum computers are now becoming a reality. Crucially, if successfully implemented, these computers could be used to decrypt any nation’s trade secrets, confidential communication, and military documents retrospectively and remotely. These technological advances are stark reminders that we cannot take information security for granted. Here, at NUS ECE and CQT, our group is working on various aspects of quantum information science and technology, covering quantum cryptography, quantum device engineering, to the foundations of quantum physics. 

Funding Support

 
 

Group members

Principal Investigator

Lim Ci Wen (Charles), PhD

Assistant Professor

NRF Fellow (2019)

Department of Electrical & Computer Engineering

Centre for Quantum Technologies

Research Fellow 

Haw Jing Yan, PhD

(Theory+Experiment)

Department of Electrical & Computer Engineering

Research Fellow  

Goh Koon Tong, PhD

(Theory)

Department of Electrical & Computer Engineering

Research Fellow 

Wang Chao, PhD

(In-Charge of Experiments)

Department of Electrical & Computer Engineering

PhD student

Emilien Lavie

(Theory)

 

Department of Electrical & Computer Engineering

PhD Student

NG Hong Jie

(Theory + Experiment)

 

Department of Electrical & Computer Engineering

 

Research Fellow 

Zhang Gong, PhD

(Device engineering)

Department of Electrical & Computer Engineering

PhD Student

Zhang Jian-Ran

(Experiment)

 

Department of Electrical & Computer Engineering

 

PhD Student

KON Wen Yu

(Theory)

 

Department of Electrical & Computer Engineering

 

PhD Student

Ignatius William Primaatmaja

(Theory)

 

Centre for Quantum Technologies

 

PhD Student

TAN Xiao Jie, Jay

(Experiment)

 

Department of Electrical & Computer Engineering

 

Research Engineer

Cassey Crystania Liang

(Experiment)

 

Department of Electrical & Computer Engineering

 

Research Engineer

Raymond Ho

(Experiment)

 

Department of Electrical & Computer Engineering

 

Looking for new members!

At the moment, we are looking to hire:

Research Engineers: Candidates with experience in FPGA development and fast electronics are highly encouraged to send in their applications (CV/resume and a one-page research statement) to Charles Lim at charles.lim@nus.edu.sg

 

PhD positions: Interested candidates are invited to send in their applications (CV/resume and a one-page research statement) to Charles Lim at charles.lim@nus.edu.sg

Research Fellow positions: Interested candidates are invited to send in their applications (CV/resume and a two-page research statement) to Charles Lim at charles.lim.@nus.edu.sg

PI contact information

Primary office:

Department of Electrical & Computer Engineering

National University of Singapore

Block E4, Level 5, Office 19,

4 Engineering Drive 3, Singapore 117583

Phone: +65 6516 2127

Email: charles.lim@nus.edu.sg

Secondary office (by appointment):

Centre for Quantum Technologies

National University of Singapore

Block S15, Level 6, Room 8

3 Science Drive 2, Singapore 117543