Pei Zeng

I do thank my collaborators @JerryGZheng, @Qian__Xu and Prof. Liang Jiang for your help and supports during the whole project!

To sum up, our early-fault-tolerant rotation gate Rz(\phi) construction is: 1. Economic: can be done with a comparable cost like CNOT lattice surgery. 2. Simple: no distillation circuit required. 3. Small footprint: ancillary requirement is small. 4. Nearest-neighbor interaction.

Our work "Error-structure-tailored early fault-tolerant quantum computing" is finally out! In this work, we have shown how to perform the continuous logical-rotation gates Rz(\phi) as simple as CNOT, but still with good accuracy! scirate.com/arxiv/2511.199…

New protocols for manipulating bosonic quantum bits offer a promising avenue toward scalable and robust quantum computation with such qubits. Read go.aps.org/4dukBG1 @Qian__Xu @QubitPei @daohongxu @UChicagoPME #PRXjustpublished #openaccess #PRXqst

If it looks Haar-random, walks Haar-randomly, quacks Haar-randomly.... it still may not be Haar-random -- provided you're only a polynomial-time observer. @aporemba_ explains our pseudorandom unitary construction.

Qian Xu @ChicagoQuantum discusses a different set of FT operations on bosonic qubits based on path independence. The idea is to make sure that the effective overall channel performs a unitary conditional on information that you can extract using ancillas. #qec23

It is a glad experience to collaborate with Qian and others on this nice work! Check Qian's talk on #qec23 today!

@quantum_graeme To connect different chips and scale up quantum computer.

Duke ECE is seeking applicants for multiple Assistant Professor positions. More abour the positions can be found here: academicjobsonline.org/ajo/jobs/25738 @DukeEngineering

The Department of Physics at Harvard University seeks to appoint a TENURE-TRACK PROFESSOR IN THEORETICAL PHYSICS. The areas of interest include: theory of soft and living matter or physical aspects of quantum information theory. physics.harvard.edu/jobs

This work is collaborated with Anran Jin and Prof. Richard Penty from Cambridge, Xingjian Zhang from Tsinghua University, and Liang Jiang from UChicago.

Also, phase randomization is introduced to decouple different photon-number components. We can then tag the photon number, effectively estimate the associated privacy using a carefully designed coherent-detection method, and independently extract keys from each component.

Continuous-variable quantum key distribution has low implementation cost, flexibility of multiplexing, and compatibility with standard coherent communication technologies. We propose a CV QKD with simple parameter estimation and no reference pulse (arxiv.org/abs/2309.03789).