skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Toward prethreshold gate-based quantum simulation of chemical dynamics: using potential energy surfaces to simulate few-channel molecular collisions

Journal Article · · Quantum Information Processing

Here, one of the most promising applications of an error-corrected universal quantum computer is the efficient simulation of complex quantum systems such as large molecular systems. In this application, one is interested in both the electronic structure such as the ground state energy and dynamical properties such as the scattering cross section and chemical reaction rates. However, most theoretical work and experimental demonstrations have focused on the quantum computation of energies and energy surfaces. In this work, we attempt to make the prethreshold (not error-corrected) quantum simulation of dynamical properties practical as well. We show that the use of precomputed potential energy surfaces and couplings enables the gate-based simulation of few-channel but otherwise realistic molecular collisions. Our approach is based on the widely used Born–Oppenheimer approximation for the structure problem coupled with a semiclassical method for the dynamics. In the latter the electrons are treated quantum mechanically but the nuclei are classical, which restricts the collisions to high energy or temperature (typically above ≈10 eV). By using operator splitting techniques optimized for the resulting time-dependent Hamiltonian simulation problem, we give several physically realistic collision examples, with 3–8 channels and circuit depths < 1000.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1435540
Report Number(s):
LA-UR-18-21819
Journal Information:
Quantum Information Processing, Vol. 17, Issue 5; ISSN 1570-0755
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

References (58)

Sensitive chemical compass assisted by quantum criticality journal February 2012
Limitations of Quantum Simulation Examined by Simulating a Pairing Hamiltonian Using Nuclear Magnetic Resonance journal August 2006
Efficient method for quantum calculations of molecule-molecule scattering properties in a magnetic field journal July 2012
Quantum Simulation of Tunneling in Small Systems journal August 2012
Quantum Simulation of the Klein Paradox with Trapped Ions journal February 2011
On the exponential solution of differential equations for a linear operator journal November 1954
Higher-order methods for simulations on quantum computers journal September 1999
Ab initio study of charge transfer in low-energy collisions with helium journal January 1999
Efficient Quantum Algorithms for Simulating Sparse Hamiltonians journal December 2006
Simulating a quantum magnet with trapped ions journal July 2008
Higher order decompositions of ordered operator exponentials journal January 2010
Inelastic processes in collisions of Na ( 3 s , 3 p ) with He at thermal energies journal November 2008
Communication: Ro-vibrational control of chemical reactivity in H+CH 4 → H 2 +CH 3 : Full-dimensional quantum dynamics calculations and a sudden model journal August 2014
Quantum phase transition of ground-state entanglement in a Heisenberg spin chain simulated in an NMR quantum computer journal January 2005
Quantum simulation of the Dirac equation journal January 2010
Quantum Simulation of Helium Hydride Cation in a Solid-State Spin Register journal April 2015
Polynomial-time quantum algorithm for the simulation of chemical dynamics journal November 2008
On the Implementation of the Method of Magnus Series for Linear Differential Equations journal June 1999
NMR simulation of an eight-state quantum system journal August 2001
Quantum implementation of the unitary coupled cluster for simulating molecular electronic structure journal February 2017
Simulating Hamiltonian Dynamics with a Truncated Taylor Series journal March 2015
Liquid-state NMR simulations of quantum many-body problems journal March 2005
Lattice, time-dependent Schrödinger equation approach for charge transfer in collisions of Be 4+ with atomic hydrogen journal June 2006
Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems journal February 2011
Almost Any Quantum Logic Gate is Universal journal July 1995
Simulating quantum systems on a quantum computer journal January 1998
Simulating Chemistry Using Quantum Computers journal May 2011
Quantum simulation and phase diagram of the transverse-field Ising model with three atomic spins journal August 2010
Quantum dynamics of CO–H2 in full dimensionality journal March 2015
NMR Implementation of a Molecular Hydrogen Quantum Simulation with Adiabatic State Preparation journal January 2010
Observation of a One-Dimensional Tonks-Girardeau Gas journal August 2004
Towards quantum chemistry on a quantum computer journal January 2010
Quantum simulation of the single-particle Schrödinger equation journal July 2008
Quantum Simulations on a Quantum Computer journal June 1999
Experimental quantum simulation of Avian Compass in a nuclear magnetic resonance system journal October 2016
Experimental simulation of quantum tunneling in small systems journal August 2013
Universal quantum simulation with prethreshold superconducting qubits: Single-excitation subspace method journal June 2015
Quantum biology journal December 2012
Universal Digital Quantum Simulation with Trapped Ions journal September 2011
Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets journal September 2017
Bounding the costs of quantum simulation of many-body physics in real space journal June 2017
Digitized adiabatic quantum computing with a superconducting circuit journal June 2016
Quantum phase transition of ground-state entanglement in a Heisenberg spin chain simulated in an NMR quantum computer text January 2005
Quantum simulation of the single-particle Schrodinger equation text January 2007
Polynomial-time quantum algorithm for the simulation of chemical dynamics text January 2008
Quantum simulation of the Dirac equation text January 2009
Quantum simulation of the Klein paradox with trapped ions text January 2010
Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems text January 2010
Sensitive Chemical Compass Assisted by Quantum Criticality text January 2011
Quantum Simulation of Tunneling in Small Systems text January 2012
Quantum Simulation of Helium Hydride in a Solid-State Spin Register text January 2014
Simulating Hamiltonian dynamics with a truncated Taylor series text January 2014
Quantum dynamics of CO-H$_2$ in full dimensionality text January 2015
Bounding the costs of quantum simulation of many-body physics in real space text January 2016
NMR Simulation of an Eight-State Quantum System text January 2001
Efficient quantum algorithms for simulating sparse Hamiltonians text January 2005
Quantum Simulations on a Quantum Computer text January 1999
Quantum simulation of a three-body interaction Hamiltonian on an NMR quantum computer text January 1999

Cited By (1)

Protobiotic Systems Chemistry Analyzed by Molecular Dynamics journal May 2019

Figures / Tables (6)