Dynamical Complexity of Non-Gaussian Many-Body Systems with Dissipation
Year: 2025
Type: article
Abstract: We characterize the dynamical state of many-body bosonic and fermionic many-body models with intersite Gaussian couplings, on-site non-Gaussian interactions, and local dissipation comprising incoherent particle loss, particle gain, and dephasing. We first establish that, for fermionic systems, if the dephasing noise is larger than the non-Gaussian interactions, irrespective of the Gaussian coupling strength, the system state is a convex combination of Gaussian states at all times. Furthermore, for bosonic systems, we show that if the particle loss and particle gain rates are larger than the Gaussian intersite couplings, the system remains in a separable state at all times. Building on this characterization, we establish that at noise rates above a threshold, there exists a classical algorithm that can efficiently sample from the system state of both the fermionic and bosonic models. Finally, we show that, unlike fermionic systems, bosonic systems can evolve into states that are not convex Gaussian even when the dissipation is much higher than the on-site non-Gaussianity. Similarly, unlike bosonic systems, fermionic systems can generate entanglement even with noise rates much larger than the intersite couplings.
Source: Physical Review Letters
DOI: 10.1103/rd56-b8tc
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: National Science Foundation, U.S. Department of Energy, Bundesministerium für Bildung und Forschung, Defense Advanced Research Projects Agency, Office of Science, Multidisciplinary University Research Initiative, Division of Materials Research, Kavli Institute for Theoretical Physics, University of California, Santa Barbara, Advanced Scientific Computing Research, Air Force Office of Scientific Research
Awards: G1397688968, G1543527024, G1938338418, G1965873410, G2127201742, G2296065515, G2545343486, QLCI-CI: NSF Quantum Leap Challenge Institute for Robust Quantum Simulation, G3094313881, G3398237449, STC: Center for Integration of Modern Optoelectronic Materials on Demand, G4689434848, G471774188, EFFICIENT AND RELIABLE MAPPING OF QUANTUM COMPUTATIONS ONTO REALISTIC ARCHITECTURES, G498862432, Kavli Institute for Theoretical Physics, G7436220671, G7788518008, EFFICIENT AND RELIABLE MAPPING OF QUANTUM COMPUTATIONS ONTO REALISTIC ARCHITECTURES, G8729776176
OpenAlex ID: W4415965624