Ground State Entanglement Energetics

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dc.creatorButtiker, M.
dc.creatorJordan, A. N.
dc.date2005-01-04
dc.date.accessioned2026-07-07T06:20:12Z
dc.date.available2026-07-07T06:20:12Z
dc.descriptionWe consider the ground state of simple quantum systems coupled to an environment. In general the system is entangled with its environment. As a consequence, even at zero temperature, the energy of the system is not sharp: a projective measurement can find the system in an excited state. We show that energy fluctuation measurements at zero temperature provide entanglement information. For two-state systems which exhibit a persistent current in the ground state, energy fluctuations and persistent current fluctuations are closely related. The harmonic oscillator serves to illustrate energy fluctuations in a system with an infinite number of states. In addition to the energy distribution we discuss the energy-energy time-correlation function in the zero-temperature limit.
dc.description10 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0501018
dc.identifierhttp://arxiv.org/abs/quant-ph/0501018
dc.identifierPhysica E 29, 272 (2005)
dc.identifierdoi:10.1016/j.physe.2005.05.024
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95266
dc.subjectQuantum Physics
dc.subjectMesoscale and Nanoscale Physics
dc.titleGround State Entanglement Energetics
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