V
Víctor Romero-Rochín
Researcher at National Autonomous University of Mexico
Publications - 90
Citations - 1334
Víctor Romero-Rochín is an academic researcher from National Autonomous University of Mexico. The author has contributed to research in topics: Phase transition & Bose–Einstein condensate. The author has an hindex of 17, co-authored 87 publications receiving 1277 citations. Previous affiliations of Víctor Romero-Rochín include Massachusetts Institute of Technology.
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Fluorescence-detected wave packet interferometry: Time resolved molecular spectroscopy with sequences of femtosecond phase-locked pulses
Norbert F. Scherer,Roger J. Carlson,Alexander Matro,Mei Du,A. J. Ruggiero,Víctor Romero-Rochín,Jeffrey A. Cina,Graham R. Fleming,Stuart A. Rice +8 more
TL;DR: In this article, a two-pulse sequence of femtosecond duration phase-locked optical laser pulses is used to resonantly excite vibronic transitions of a molecule, where a definite optical phase angle between the pulses is maintained while varying the interpulse delay with interferometric precision.
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Relaxation properties of two-level systems in condensed phases
TL;DR: In this article, the exact equation of motion for the reduced density matrix of a system weakly coupled to a bath is obtained using projection operator techniques, which reduces to a generalized master equation when the bath relaxation is faster than the relaxation of the system induced by the weak interaction with the bath.
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Equation of state of an interacting bose gas confined by a harmonic trap: the role of the "harmonic" pressure.
TL;DR: It is shown that there appear "new" thermodynamic variables instead of the usual pressure and volume: the latter is replaced by the cube of the geometric average of the oscillator frequencies of the trap, and the former by the harmonic pressure responsible for the mechanical equilibrium of the fluid in the trap.
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Theory of spin-relaxation processes
TL;DR: In this paper, the relaxation properties of a spin system weakly coupled to lattice degrees of freedom are described using an equation of motion for the spin density matrix, derived using a general weak coupling theory which has been previously developed.
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Nonexistence of equilibrium states at absolute negative temperatures.
TL;DR: It is shown that states of macroscopic systems with purported absolute negative temperatures are not stable under small, yet arbitrary, perturbations, and it is proved using the fact that, in equilibrium, the entropy takes its maximum value.