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Trapped Ion Quantum Computing Quantum Simulation

Lowering of the kinetic energy in interacting quantum systems.

PubMed
Authors: Militzer B, Pollock EL

Year

2002

Paper ID

13051

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

103

Citations

38

Abstract

Interactions never lower the ground state kinetic energy of a quantum system below the noninteracting value. However, at nonzero temperature, where the system occupies a thermal distribution of states, interactions can reduce the kinetic energy. This can be demonstrated from a first order weak coupling expansion. Simulations (both variational and restricted path integral Monte Carlo) of the electron gas model and dense hydrogen confirm this and show that in contrast to the ground state case, at nonzero temperature the population of low momentum states can be increased relative to the free Fermi distribution. This effect is not seen in simulations of liquid 3He.

Why This Paper Matters

  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
  • It adds a 2002 reference point for readers tracking recent quantum research.
  • Interactions never lower the ground state kinetic energy of a quantum system below the noninteracting value.

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.89.280401 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/12513126/

Local Citation Graph (Related-Paper Links)

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External citation index: OpenAlex citation signal • updated 2026-10-21 17:17:23

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