5 citations · 5 across the 25 of their papers we have counts for
28 papers
QuDPy-FDGF: A Python-Based Tool for Computing Ultrafast Nonlinear Optical Responses Using Frequency Domain Green's Functions
Mathieu Desmarais, Simón Paiva-Ortega, Félix Brunell +3
We present QuDPy-FDGF, an open-source Python framework that evaluates Liouville-space pathways as hybrid chains of time propagators and frequency-domain Green's functions. Frequenc…
PULSUS: Direct Frequency-Domain Multidimensional Spectroscopy Beyond the Impulsive Rotating-Wave Approximation
Alfonso Castillo-Gonzalez, Alfonso Castillo-Gonzolez, Eric R. Bittner +1
We introduce PULSUS, a direct frequency-domain framework for multidimensional spectroscopy of open quantum systems beyond the impulsive rotating-wave approximation. Coherence-frequ…
Collective Excitonic Structure Governs Anomalously Weak Thermal Optical Dephasing in Conjugated Polymers
Henry J. Kantrow, Elizabeth Gutiérrez-Meza, Eric R. Bittner +2
Conjugated polymer aggregates exhibit optical decoherence in the presence of strong vibronic coupling and substantial diversity in chemical structure, solid-state organization, and…
SAKE: Spectral Autodiff Kernel Expansion for Geometric Liouvillian Transport. A Differential-Geometric Framework for Response Transport in Quantum Dynamical Systems
Eric R. Bittner, Carlos Silva-Acuna, Hao Li +1
We introduce the Spectral Autodiff Kernel Expansion (SAKE), a differentiable computational framework for transporting nonlinear spectroscopic response between neighboring quantum d…
State--Generator Geometry of Open Quantum Systems: Compatibility and Covariant Transport
Eric R. Bittner, Carlos Silva-Acuna
We develop a geometry for transporting stationary-state response across the control space of an open quantum system. A physical model is represented by the ordered pair of its stat…
Geometric Response in Open Quantum Systems: Coherence, Curvature, and Susceptibility
Eric R. Bittner, Carlos Silva-Acuña
We develop a response-geometric framework for open quantum systems by decomposing the stationary-state response tensor into symmetric and antisymmetric sectors. The symmetric secto…
The Helical SYK Model and Emergent Infrared Integrability
Gustavo Valdivia-Mera, Bhavay Tyagi, Eric R. Bittner +1
We construct a helical generalization of the Sachdev-Ye-Kitaev (SYK) model in dimensions, built from left- and right-moving Majorana fermions with local quartic interactions…
Liouvillian Geometry of Multidimensional Spectra: Pathway Transport and Observational Holonomy in Open Quantum Systems
Eric R. Bittner, Carlos Silva-Acuña, Hao Li
Liouville pathways provide the conceptual foundation for interpreting multidimensional spectroscopies and are commonly represented as independent contributions to the nonlinear res…
Holonomy and Complementarity in Open Quantum Systems
Eric R Bittner
Complementarity relations constrain the distribution of coherence, predictability, and openness in quantum systems. Here we show that, in open quantum systems, these local constrai…
Phase-Reference Control of Steady-State Entanglement in Open Quantum Systems
Areeda Ayoub, Alfonso Castillo-Gonzalez, Eric R Bittner
We show that steady-state entanglement in open quantum systems is controlled by the phase reference of a phase-sensitive reservoir. Using a covariance-matrix approach for Gaussian-…
Detection Defines Dephasing in Two-Dimensional Electronic Spectroscopy of Materials: Coherent Field Emission versus Incoherent Population Observables
Simón Paiva-Ortega, Hao Li, Eric R. Bittner +1
The homogeneous spectral linewidth associated with light-matter interactions is a fundamental descriptor of the optical properties of materials, governed by the quantum dynamics of…
Geometric Thermodynamics in Open Quantum Systems: Coherence, Curvature, and Work
Eric R. Bittner
We formulate a geometric framework for quasistatic thermodynamics in open quantum systems by parameterizing the dynamics on a control manifold. In the quasistatic limit, the system…
Thermalization Regimes in a Chaotic Tavis-Cummings Model
Sameer Dambal, Eric R. Bittner
This work investigates the emergent thermalization regimes in a chaotic Tavis-Cummings (TC) model and their implications in quantum spectroscopy. While the TC model is a cornerston…
Mixed response geometry and critical crossover in the Ising model
Eric R. Bittner
We develop a geometric formulation of thermodynamic response in interacting spin systems and apply it to the two-dimensional Ising model. Treating inverse temperature and magnetic…
Gaussian Phase Noise Effects on Hybrid Precoding MIMO Systems for Sub-THz Transmission
Yaya Bello, Yahia Medjahdi, Laurent Clavier +1
The sub-THz spectrum offers numerous advantages, including massive multiple-input multiple-output (MIMO) technology with large antenna arrays that enhance spectral efficiency (SE)…
Graph Symmetry Organizes Exceptional Dynamics in Open Quantum Systems
Eric R. Bittner, Bhavay Tyagi, Kevin E. Bassler
Exceptional points (EPs), indicative of parity-time (PT) symmetry breaking, play a central role in non-Hermitian physics, yet most studies begin from deliberately engineered effect…
Entropy Flow and Exceptional-Point Structure in Two-Mode Squeezed-Bath Dynamics
Eric R. Bittner
Squeezed reservoirs provide a powerful means of engineering nonclassical noise and controlling irreversible dynamics in open quantum systems. Here we develop a comprehensive analys…
Topology and Spectral Entanglement in Cavity-Mediated Photon Scattering
Eric R. Bittner, Andrei Piryatinski
We develop a diagrammatic theory of cavity-mediated photon-photon interactions in a topological insulator using the SSH model. The fourth-order vertex governs sp…
A Clockwork Quantum: Symmetry, Noise, and the Emergence of Quantum Order
Eric R. Bittner, Bhavay Tyagi
We present a concise review and perspective on noise-induced synchronization and coherence protection in open quantum systems, with emphasis on recent work involving coupled spins,…
Tensorial Spin-Phonon Relaxation Reveals Mode-Selective Relaxation Pathways in a Single-Molecule Magnet
Roman Dmitriev, Nosheen Younas, Yu Zhang +2
Understanding and controlling spin relaxation in molecular qubits is essential for developing chemically tunable quantum information platforms. We present a fully first-principles…
Coherent Spectroscopic Probes of Topology: A Velocity-Gauge Perspective
Eric R Bittner, Carlos Silva-Acuna
We present a velocity-gauge formalism for computing nonlinear current response functions in periodic systems and apply it to the Su-Schrieffer-Heeger (SSH) model as a minimal topol…
Statistical Control of Relaxation and Synchronization in Open Anyonic Systems
Eric R. Bittner, Bhavay Tyagi
Quantum statistics dictate how particles exchange and correlate-but in two-dimensional systems, these rules extend beyond bosons and fermions to anyons, quasiparticles with continu…
Quantum dynamics of photophysical aggregates in conjugated polymers
Henry J. Kantrow, Elizabeth Gutiérrez-Meza, Hongmo Li +7
Photophysical aggregates are ubiquitous in many solid-state microstructures adopted by conjugated polymers, in which electrons interact with those in other polymer chains or th…
Noise-induced synchronization in coupled quantum oscillators
Eric R Bittner, Bhavay Tyagi
We consider the quantum dynamics of a pair of coupled quantum oscillators coupled to a common correlated dissipative environment. The resulting equations of motion for both the ope…