Da-Shin Lee

The role of causality in tunable Fermi gas condensates

We develop a new formalism for the description of the condensates of cold Fermi atoms whose speed of sound can be tuned with the aid of a narrow Feshbach resonance. We use this to look for spontaneous phonon creation that mimics spontaneous particle creation in curved space-time in Friedmann-Robertson-Walker and other model universes.

Holographic Approach to Nonequilibrium Dynamics of Moving Mirrors Coupled to Quantum Critical Theories

We employ the holographic method to study fluctuations and dissipation of an

Derivation of hydrodynamics for the gapless mode in the BEC-BCS crossover from the exact one-loop effective action

n

Holographic influence functional and its application to decoherence induced by quantum critical theories

-dimensional moving mirror coupled to quantum critical theories in

Environment-induced uncertainties on moving mirrors in quantum critical theories via holography

d

Nonequilibrium damping of the collective motion of homogeneous cold Fermi condensates with Feshbach resonances

spacetime dimensions. The bulk counterpart of the mirror with perfect reflection is a D

Nonuniversal behavior of cold Fermi condensates with narrow Feshbach resonances

(n+1)

When are two fermions a simple boson? New Gross–Pitaevskii actions for cold Fermi condensates

brane in the Lifshitz geometry of

Quantum sound-cone fluctuations in cold Fermi gases: Phonon propagation

d+1

Large phonon time-of-flight fluctuations in expanding flat condensates of cold fermi gases

dimensions. The motion of the mirror can be realized from the dynamics of the brane at the boundary of the bulk. The excited modes of the brane in the bulk render the mirror undergoing Brownian motion. For small displacement of the mirror, we derive the analytical results of the correlation functions and response functions. The dynamics of the mirror due to small fluctuations around the brane vacuum state in the bulk is found supraohmic so that after initial growth, the velocity fluctuations approach a saturated value at late time with a power-law behavior. On the contrary, in the Lifshitz black hole background, the mirror in thermal fluctuations shows that its relaxation dynamics becomes ohmic, and the saturation of velocity fluctuations is reached exponentially in time. Finally a comparison is made with the result of a moving mirror driven by free fields.