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| False vacuum | |
|---|---|
| Name | False vacuum |
| Field | Cosmology; Particle physics |
| Introduced | 1970s |
| Notable people | Sidney Coleman, Frank Wilczek, Alan Guth, Andrei Linde, Steven Weinberg |
False vacuum
A false vacuum is a metastable state in quantum field theory and cosmology in which a field configuration has higher energy than the lowest‑energy state but is locally stable against small perturbations. It appears in discussions of early universe scenarios, inflation, and the stability of the Standard Model Higgs potential, and it figures in theoretical work by figures associated with Particle physics, Cosmology, and Quantum field theory.
A false vacuum is a local minimum of a quantum field potential differing from the global minimum; transitions from the false to the true vacuum proceed via quantum tunneling, thermal activation, or catalysis by compact objects. Important contexts include discussions by Alan Guth and Andrei Linde on cosmic inflation, analyses by Sidney Coleman of vacuum decay via instantons, and stability studies by Steven Weinberg and Frank Wilczek regarding the Higgs boson and electroweak vacuum. The concept bridges Quantum mechanics, General relativity, and particle physics models tested at facilities such as the Large Hadron Collider.
Vacuum structure arises from potentials in quantum field theories like the Standard Model and extensions such as Supersymmetry or Grand Unified Theory frameworks. Seminal formalism uses Euclidean instanton solutions developed by Sidney Coleman and collaborators to compute decay rates, employing techniques related to the Path integral formulation and Quantum tunneling in field space. Radiative corrections and renormalization group running, as studied by Ken Wilson and Gerard 't Hooft, can reshape effective potentials and create or remove metastable minima. Gauge sectors and scalar fields, especially the Higgs boson, often define the shape of the potential considered in these analyses.
Metastability implies a finite lifetime governed by a decay rate calculable from semiclassical methods, including the Coleman–De Luccia formalism when gravity is included, an approach associated with Sidney Coleman and Frank De Luccia. Bubble nucleation produces regions of true vacuum that expand if energetically favored; dynamics draw on concepts from General relativity, domain wall dynamics studied in Topological defect literature, and thin‑wall approximations used in analytic estimates. Catalysis mechanisms include collision with high‑energy particles, black hole induced decay studied in the context of Stephen Hawking's work, and thermal transitions relevant to epochs considered by Andrei Linde in early universe models.
If the observed universe resides in a metastable vacuum, a transition to the true vacuum could alter particle masses, coupling constants, and vacuum energy, impacting cosmological histories discussed by Alan Guth, Andrei Linde, and Alex Vilenkin. Connections exist to cosmic inflation, false vacuum inflationary models, and scenarios for bubble collisions that influence anisotropies probed by missions like Wilkinson Microwave Anisotropy Probe and Planck. Vacuum decay can produce cosmological signatures such as gravitational waves investigated by collaborations like LIGO and LISA, and may constrain models through impacts on nucleosynthesis examined in studies linked to George Gamow-era considerations.
Collider experiments, notably at the Large Hadron Collider, measure parameters of the Higgs boson and top quark, which feed into vacuum stability analyses via renormalization group evolution performed in work by Graham Shore-style collaborators and others. Astrophysical observations—cosmic microwave background measurements by Planck and large‑scale structure surveys such as Sloan Digital Sky Survey—place indirect constraints on early universe histories involving false vacua. Searches for gravitational wave backgrounds by LIGO and proposals for space observatories like LISA aim to detect signals from first‑order transitions; null results constrain parameter space in Beyond the Standard Model scenarios including Electroweak baryogenesis models developed in association with researchers at institutions like CERN.
Models invoking false vacua include old inflation, new inflationary constructions of Alan Guth and Andrei Linde, and landscapes arising in String theory frameworks associated with Edward Witten and Joseph Polchinski. Mechanisms to stabilize or destabilize vacua involve supersymmetric sectors, additional scalar fields, or higher‑dimensional operators studied in Effective field theory approaches championed by figures linked to Ken Wilson's legacy. Bubble nucleation rates and post‑nucleation dynamics are modeled numerically by groups working on lattice field theory and semiclassical simulations used in collaborations at institutions such as Princeton University and Harvard University.
False vacuum discussions raise conceptual questions about predictive power in multiverse and landscape proposals associated with Alexander Vilenkin and Andrei Linde, measure problems debated in work by Sean Carroll and Max Tegmark, and anthropic reasoning invoked in arguments by Steven Weinberg. The possibility that vacuum decay could be non‑observable before catastrophe prompts debates on risk assessment informed by ethics scholars and policy discussions intersecting with research at organizations like CERN during high‑energy experimentation. Epistemic issues concern testability, confirmation, and model selection central to philosophy of science communities linked to universities such as Oxford University and Massachusetts Institute of Technology.