# The Fermionic Quantum Emulator

@article{Rubin2021TheFQ, title={The Fermionic Quantum Emulator}, author={Nicholas C Rubin and Klaas Gunst and Alec F. White and Leon Freitag and Kyle Throssell and Garnet Kin-Lic Chan and Ryan Babbush and Toru Shiozaki}, journal={Quantum}, year={2021}, volume={5}, pages={568} }

The fermionic quantum emulator (FQE) is a collection of protocols for emulating quantum dynamics of fermions efficiently taking advantage of common symmetries present in chemical, materials, and condensed-matter systems. The library is fully integrated with the OpenFermion software package and serves as the simulation backend. The FQE reduces memory footprint by exploiting number and spin symmetry along with custom evolution routines for sparse and dense Hamiltonians, allowing us to study…

## 9 Citations

### Unbiasing fermionic quantum Monte Carlo with a quantum computer

- PhysicsNature
- 2022

The results demonstrate a new paradigm of hybrid quantum-classical algorithm, surpassing the popular variational quantum eigensolver in terms of potential towards the first practical quantum advantage in ground state many-electron calculations.

### Compressing Many-Body Fermion Operators under Unitary Constraints.

- PhysicsJournal of chemical theory and computation
- 2022

The most efficient known quantum circuits for preparing unitary coupled cluster states and applying Trotter steps of the arbitrary basis electronic structure Hamiltonian involve interleaved sequences…

### Adaptive variational preparation of the Fermi-Hubbard eigenstates

- PhysicsPhysical Review A
- 2022

Approximating the ground states of strongly interacting electron systems in quantum chemistry and condensed matter physics is expected to be one of the earliest applications of quantum computers. In…

### QForte: an efficient state simulator and quantum algorithms library for molecular electronic structure

- Computer Science, Physics
- 2021

It is highlighted how the Python class structure of QForte enables the facile implementation of new algorithms, and how existing algorithms can be executed in just a few lines of code.

### Insights from an adaptive variational wave function study of the Fermi-Hubbard Model

- Physics
- 2021

Approximating the ground states of strongly interacting electron systems in quantum chemistry and condensed matter physics is expected to be one of the earliest applications of quantum computers. In…

### Ab initio Quantum Simulation of Strongly Correlated Materials with Quantum Embedding

- Chemistry
- 2022

Quantum computing has shown great potential in various quantum chemical applications such as drug discovery, material design, and catalyst optimization. Although signiﬁcant progress has been made in…

### Analytical Ground- and Excited-State Gradients for Molecular Electronic Structure Theory from Hybrid Quantum/Classical Methods

- Physics
- 2021

We develop analytical gradients of groundand excited-state energies with respect to system parameters including the nuclear coordinates for the hybrid quantum/classical multistate contracted…

### ChemiQ: A Chemistry Simulator for Quantum Computer

- Computer Science
- 2021

A standalone quantum simulation tool for chemistry, ChemiQ, which is designed to assist people carry out chemical research or molecular calculation on real or virtual quantum computers, under the idea of modular programming in C++ language.

### ipie: A Python-based Auxiliary-Field Quantum Monte Carlo Program with Flexibility and Efficiency on CPUs and GPUs

- Physics
- 2022

We report the development of a python-based auxiliary-ﬁeld quantum Monte Carlo (AFQMC) program, ipie , with preliminary timing benchmarks and new AFQMC results on the isomerization of [Cu 2 O 2 ] 2+…

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