[last initial] [first name] at gmail dot com
I'm a third-year PhD student at QuICS,
where I research quantum information and computation. I'm fortunate to be co-advised by
Andrew Childs and
Name in Chinese: 王道辰.
I'm interested in structures beneath quantum speed-ups, algorithm design, and real-world applications.
Works below listed in order of first appearance on
arXiv (most recent to least recent). Research award: NSF QISE-NET.
*: equal contribution
†: alphabetical order, following convention in
1. Quantum exploration algorithms for multi-armed bandits
Andrew M. Childs
AAAI 2021 (to appear)
[QTML 2020: slides, talk]
Identifying the best arm in a quantum
multi-armed bandit (I illustrate such an object on the left)
can be done quadratically faster by quantum computation.
2. Symmetries, graph properties, and quantum speedups
Andrew M. Childs,
[QIP 2021 (to appear)] [MSR slides]
[Property Testing Review]
We characterise how a problem's symmetries determine whether quantum computation can substantially
speed up its solution; it turns out graph symmetries play the key role.
Subsumes our earlier work.
3. Efficient quantum measurement of Pauli operators
in the presence of finite sampling error
Ophelia Crawford*, Barnaby van Straaten*, Daochen Wang*,
Quantum 2021 (to appear)
[QCTIP 2020: talk]
The number of measurements needed to estimate the expectation value of an observable can be
reduced by a few orders of magnitude via simultaneous measurements.
4. Simulating quantum circuits by classical circuits
arXiv 2019 (under revision)
I extract a notion of "p-simulation" from
a breakthrough paper in 2018
and then construct explicit classical circuits that can p-simulate any quantum circuit.
5. Variational quantum computation of excited states
Oscar Higgott, Daochen Wang, Stephen Brierley
Penalising overlaps between quantum states
variational quantum eigensolver to compute excited states at little extra cost.
6. Accelerated variational quantum eigensolver
Daochen Wang, Oscar Higgott, Stephen Brierley
Physical Review Letters 2019
Given greater coherence times, the
variational quantum eigensolver can be made faster by making it
behave more like
quantum phase estimation.
7. Driving Rabi oscillations at the giant dipole resonance in xenon
Stefan Pabst, Daochen Wang, Robin Santra
Physical Review A 2015
Super-short yet super-intense pulses of light can drive electrons up and down between standard bound states
of negative energy and a pseudo-bound state of positive energy.
OpenFermion: the electronic structure package for quantum computers
Jarrod R. McClean,
Kevin J. Sung, Ian D. Kivlichan, Yudong Cao, Chengyu Dai, E. Schuyler Fried,
Thomas Häner, Tarini Hardikar, Vojtěch Havlíček,
Oscar Higgott, Cupjin Huang,
Zhang Jiang, Xinle Liu, Sam McArdle, Matthew Neeley,
Thomas O'Brien, Bryan O'Gorman, Isil Ozfidan,
Maxwell D. Radin,
Nicolas P. D. Sawaya, Kanav Setia, Sukin Sim, Damian S. Steiger, Mark Steudtner,
Qiming Sun, Wei Sun,
Daochen Wang, Fang Zhang, Ryan Babbush
Quantum Science and Technology 2020
I contributed code that allows you to automatically retrieve molecular geometries from the
PubChem database - try: geometry_from_pubchem('water').