Physical Background

Stephen J. Gustafson, Israel Michael Sigal

Stephen J. Gustafson, Israel Michael Sigal

Sophia Denker

Nicolai Gayle Nygaard, Nikolaj Thomas Zinner

The stabilization of Cooper pairs of bound electrons in the background of a Fermi sea is the origin of superconductivity and the paradigmatic example of the striking influence of many-body physics on few-body properties. In the quantum-mechanical three-body problem the famous Efimov effect yields unexpected scaling relations among a tower of universal states. These seemingly unrelated problems can now be studied in the same setup thanks to the success of ultracold atomic gas experiments. In light of the tremendous effect of a background Fermi sea on two-body properties, a natural question is whether a background can modify or even destroy the Efimov effect. Here we demonstrate how the generic problem of three interacting particles changes when one particle is embedded in a background Fermi sea, and show that Efimov scaling persists. It is found in a scaling that relates the three-body physics to the background density of fermionic particles.

Li Liu

Aiming at the inherent challenges of quantum decoherence and environmental thermal-noise interference faced by modern quantum computing architectures, this paper establishes a novel quantum state evolution correction framework based on the Ultimate Background Wave Field Theory. Taking the intrinsic spacetime distribution and energy density property of the cosmic background wave field as the fundamental physical premise, this study introduces a global background field coupling correction term. Through self-consistent mathematical physical derivation, a modified quantum state evolution equation is constructed, and a complete physical mechanism for active decoherence suppression is systematically demonstrated. The theoretical analysis indicates that the background wave field correction can effectively weaken the system-environment entanglement coupling strength, stabilize quantum state evolution, extend coherent lifetime, suppress computational noise level, and improve the overall state fidelity. The proposed theoretical framework is naturally compatible with superconducting qubits, ion trap systems, photonic quantum computing and other mainstream hardware routes. It requires no hardware reconstruction, no redundant physical qubits, and brings no extra computational or energy overhead. This work provides an original and logically self-consistent physical paradigm for noise suppression and decoherence mitigation in quantum information research.

Riccardo Bassoli, Holger Boche, Christian Deppe +4 more