2 citations · 9 across the 30 of their papers we have counts for
33 papers
Momentum conservation for ab initio calculations with pseudopotentials via a phase space electronic structure formulation
Guy Ohad, Nadine C. Bradbury, Joseph E. Subotnik
We demonstrate how to build a robust phase space electronic Hamiltonian that depends on nuclear position and nuc…
An Exact Formulation of Phase-Space Electronic Structure Theory in One Dimension by Exploiting the Zero Curvature Condition
Zain Zaidi, Yotam M. Y. Feldman, Linqing Peng +1
We show that, for the unique case of a system of electrons and nuclei in one dimension, the $\hGamma$ operator in phase space electronic structure theory has a zero non-Abelian cur…
A Phase Space Electronic Structure View of The Solid State
Nadine Bradbury, Linqing Peng, Joseph Subotnik
We develop a phase space electronic structure view of the solid state, where electronic bands are parameterized by both nuclear position and nuclear momentum $\mathbfΠ…
A Perspective on Phase Space Electronic Structure Theory : From Its Surface Hopping Origins Through To Its Future Promise
Joseph E. Subotnik, Ethan Alguire, Nicole Bellonzi +20
We trace the history of phase space electronic structure theory (PSEST), high- lighting how this powerful approach emerged from fundamental questions in semi- classical surface hop…
Electronic Structure in a Phase Space, non-Born-Oppenheimer Framework: Geometric Forces and Moody-Shapere-Wilzcek Revisited
Mansi Bhati, D. Vale Cofer-Shabica, Jonathan I. Rawlinson +3
We revisit the three-body problem in quantum mechanics in two and three dimensions, generating both exact eigenvalues and eigenvectors of the Hamiltonian and a series of approximat…
A Conceptual Shift In Our Understanding of Degenerate Radical Spin Systems: Spin-Rotation Coupling Turned On Its Head
Linqing Peng, Titouan Duston, Nadine Bradbury +4
For most chemists, Kramers' degeneracy refers to the fact that for any radical system, every potential energy surface is at least doubly degenerate (with spin up and spin down, tim…
Charge Transfer with a Spin. II: A Framework for Diabatization which Localizes Charge and Spin
Alok Kumar, Zhen Tao, Zuxin Jin +2
We investigate a diabatization procedure that localizes charges (in real space) and localizes spins (in spin space) for open-shell systems that exhibit charge transfer in the prese…
Charge Transfer with a Spin. I: A Variational Constrained-CASSCF Framework for Investigating Charge Transfer in the Presence of Spin-Orbit Coupling
Alok Kumar, Zhen Tao, Joseph E. Subotnik +1
Charge transfer in open-shell molecular systems can involve a delicate interplay between charge localization, orbital relaxation, and spin-orbit coupling (SOC), particularly near g…
Phase Space Electronic Structure Theory: From Diatomic Lambda-Doubling to Macroscopic Einstein-de Haas
Linqing Peng, Tian Qiu, Nadine Bradbury +5
-doubling of diatomic molecules is a subtle microscopic phenomenon that has long attracted the attention of experimental groups, insofar as rotation of molecular $\textit{nuclei…
Electron Transfer, Diabatic Couplings and Vibronic Energy Gaps in a Phase Space Electronic Structure Framework
Zain Zaidi, Xuezhi Bian, Joseph E. Subotnik
We investigate the well-known Shin-Metiu model for an electronic crossing, using both a standard Born-Huang (BH) framework and a novel phase space (PS) electronic Hamiltonian frame…
Marcus Theory and The Condon Approximation Revisited I: E-SHAKE and Seam Sampling
D. Vale Cofer-Shabica, Jennifer R. DeRosa, Joseph E. Subotnik
Marcus theory is the workhorse of theoretical chemistry for predicting the rates of charge and energy transfer. Marcus theory overwhelmingly agrees with experiment -- both in terms…
Marcus Theory and The Condon Approximation Revisited II: The Horror of Triplet Energy Transfer
Jennifer R. DeRosa, Tian Qiu, D. Vale Cofer-Shabica +1
We investigate the applicability of the Condon approximation (i.e. the notion that the diabatic coupling is invariant to geometry) in the context of both electron transfer (ET) and…
Non-Resonant Raman Optical Activity From Phase-Space Electronic Structure Theory
Zhen Tao, Mansi Bhati, Joseph E. Subotnik
In order to model experimental non-resonant Raman optical activity, chemists must compute a host of second-order response tensors, (e.g. the electric-dipole magnetic-dipole polariz…
Fast Methods For Multisite Charge Transfer Processes II: Analytic Nuclear Gradients and Nonadiabatic Dynamics For cCASSCF(1,M) and cCASSCF(2M-1,M) Wavefunctions
Tian Qiu, Joseph E. Subotnik
We derive and implement analytic nuclear gradients and derivative couplings for a constrained Complete Active Space Self-Consistent Field with a small active space designed to mode…
Fast Methods For Multisite Charge Transfer Processes I: Constrained, State Averaged CASSCF(1,M) and CASSCF(2M-1,M) Simulations
Tian Qiu, Joseph E. Subotnik
We design a dynamically-weighted state-averaged constrained CASSCF to treat \ul{e}lectrons or \ul{h}oles moving between molecular fragments (where can be larger than 2). Wi…
The Phase-Space Way To Electronic Structure Theory and Subsequently Chemical Dynamics
Xuezhi Bian, Titouan Duston, Nadine Bradbury +6
Phase-space electronic structure theory offers up a new and powerful approach for tackling problems with coupled nuclear-electronic dynamics in a fashion that goes beyond Born-Oppe…
Conical Intersections and Electronic Momentum As Viewed From Phase Space Electronic Structure Theory
Titouan Duston, Nadine Bradbury, Zhen Tao +1
We investigate the structure of a prototypical two-state conical intersection (BeH) using a phase space electronic Hamiltonian $\hat{H}_{PS}(\bR,\bP)$ that goes beyond the Born…
Recovering Exact Vibrational Energies Within a Phase Space Electronic Structure Framework
Xinchun Wu, Xuezhi Bian, Jonathan Rawlinson +2
In recent years, there has been a push to go beyond Born-Oppenheimer theory and build electronic states from a phase space perspective, i.e. parameterize electronic states by both…
Symmetry Breaking as Predicted by a Phase Space Hamiltonian with a Spin Coriolis Potential
Nadine C. Bradbury, Titouan Duston, Zhen Tao +3
We perform electronic structure calculations for a set of molecules with degenerate spin-dependent ground states (CH, CH, O) going beyond the Born…
The Role of Quantum Vibronic Effects in the Spin Polarization of Charge Transport through Molecular Junctions
Samuel L. Rudge, Christoph Kaspar, Rudolf Smorka +3
The connection between molecular vibrations and spin polarization in charge transport through molecular junctions is currently a topic of high interest, with important consequences…
A Phase-Space Electronic Hamiltonian for Molecules in a Static Magnetic Field II: Quantum Chemistry Calculations with Gauge Invariant Atomic Orbitals
Mansi Bhati, Zhen Tao, Xuezhi Bian +3
In a companion paper, we have developed a phase-space electronic structure theory of molecules in magnetic fields, whereby the electronic energy levels arise from diagonalizing a p…
A Phase-Space Electronic Hamiltonian for Molecules in a Static Magnetic Field I: Conservation of Total Pseudomomentum and Angular Momentum
Mansi Bhati, Zhen Tao, Xuezhi Bian +3
We develop a phase-space electronic structure theory of molecules in magnetic fields. For a system of electrons in a magnetic field with vector potential , th…
A semiclassical non-adiabatic phase-space approach to molecular translations and rotations: A new picture of surface hopping and electronic inertial effects
Xuezhi Bian, Yanze Wu, Tian Qiu +2
We present a novel semiclassical phase-space surface hopping approach that goes beyond the Born-Oppenheimer approximation and all existing surface hopping formalisms. We demonstrat…
An Efficient Algorithm for Constrained CASSCF(1,2) and CASSCF(3,2) Simulations as Relevant to Electron and Hole Transfer Problems
Tian Qiu, Joseph E. Subotnik
We propose an efficient algorithm for the recently published electron/hole-transfer Dynamical-weighted State-averaged Constrained CASSCF (eDSC/hDSC) method studying charge transfer…