Exotic quantum holonomy in Hamiltonian systems (2009)
Cheon, Taksu, Tanaka, Atushi, Kim, Sang Wook
We study the evolution of quantum eigenstates in the presence of level crossing under adiabatic cyclic change of environmental parameters. We find that exotic holonomies, indicated by exchange of the...
Observation of an exceptional point in a chaotic optical microcavity (2009)
Lee, Sang-Bum, Yang, Juhee, Moon, Songky, Lee, Soo-Young, Shim, Jeong-Bo, Kim, Sang Wook, ...
We present spectroscopic observation of an exceptional point or the transition point between diabatic crossing and avoided crossing of neighboring quasi-eigenmodes in a chaotic optical microcavity...
Ryu, Jung-Wan, Lee, Soo-Young, Kim, Sang Wook
We investigate two coupled microdisks with non-identical radii focusing on the parametric evolution of energy levels and the unidirectional far-field emission. We show that the evolution of energy...
Quasi-Eigenstate Evolution in Open Chaotic Billiards (2009)
Lee, Sang-Bum, Yang, Juhee, Moon, Songky, Lee, Soo-Young, Shim, Jeong-Bo, Kim, Sang Wook, ...
We experimentally studied evolution of quasi-eigenmodes as classical dynamics undergoing a transition from being regular to chaotic in open quantum billiards. In a deformation-variable microcavity we...
Exotic quantum holonomy induced by degeneracy hidden in complex parameter space (2009)
Kim, Sang Wook, Cheon, Taksu, Tanaka, Atushi
An adiabatic change of a bound state along a closed circuit in the parameter space can induces holonomies not only in the phase of the state, but also in the associated eigenspace and eigenvalue. The...
Asymmetric scattering and non-orthogonal mode patterns in optical micro-spirals (2008)
Wiersig, Jan, Kim, Sang Wook, Hentschel, Martina
Quasi-bound states in an open system do in general not form an orthogonal and complete basis. It is, however, expected that the non-orthogonality is weak in the case of well-confined states except...
mSCTP for Vertical Handover Between Heterogeneous Networks (2008)
Abstract. Stream Control Transmission Protocol (SCTP) is a new end-to-end transport protocol that is featured ‘multi-homing. ’ The mSCTP (mobile SCTP) is defined as SCTP with the capability of...
Quantum Localization in Open Chaotic Systems (2008)
Ryu, Jung-Wan, Hur, G., Kim, Sang Wook
We study a quasi-Floquet state of a $\delta$-kicked rotor with absorbing boundaries focusing on the nature of the dynamical localization in open quantum systems. The localization lengths $\xi$ of...
Relativistic Cyclotron Motion in a Polarized Electric Field (2007)
Sang Wook Kim, Duck-hee Kwon, Hai-woong Lee
The relativistic cyclotron motion in a uniform magnetic field and in a transverse time-periodic electric field is studied, with particular attention to qualitative differences in the nature of the...
Storage of spin squeezing in a two-component Bose-Einstein condensate (2007)
Efficient control of spin squeezing in a two-component Bose-Einstein Condensate is studied by rapidly turning-off the external field at a time that maximal spin squeezing appears. We show that strong...
Improvement of conversion efficiency of atom-molecule Bose-Einstein condensate (2007)
We investigate the stimulated Raman adiabatic passage in two-color photoassociation for a atom-molecule Bose-Einstein condensate. By applying two time-varying Guassian laser pulses that fulfill...
Spin squeezing and maximal-squeezing time (2007)
Spin squeezing of a nonlinear interaction model with Josephson-like coupling is studied to obtain time scale of maximal squeezing. Based upon two exactly solvable cases for two and three particles,...
Lee, Sang-Bum, Shim, Jeong-Bo, Kim, Sang Wook, Yang, Juhee, Moon, Songkee, Lee, Jai-Hyung, ...
Experimental investigation of the characteristics of quasi-bound states of a quadrupole deformed microcavity has revealed five distinct mode groups in cavity emission spectra with cavity quality...
Shim, Jeong-Bo, Lee, Hai-Woong, Lee, Sang-Bum, Yang, Juhee, Moon, Songki, Lee, Jai-Hyung, ...
We have investigated quasi-eigenmodes of a quadrupolar deformed microcavity by extensive numerical calculations. The spectral structure is found to be quite regular, which can be explained on the...
Chaos-assisted nonresonant optical pumping of quadrupole-deformed microlasers (2006)
Lee, Sang-Bum, Shim, Jeong-Bo, Kim, Sang Wook, Yang, Juhee, Lee, Hai-Woong, Lee, Jai-Hyung, ...
Efficient nonresonant optical pumping of a high-Q scar mode in a two-dimensional quadrupole-deformed microlaser has been demonstrated based on ray and wave chaos. Three-fold enhancement in the lasing...
Universal service access for ubiquitous computing applications / (2006)
Thesis (M.S.)--Marquette University, 2006.
Decoherence Driven Quantum Transport (2005)
Kim, Sang Wook, Choi, Mahn-Soo
We propose a new mechanism to generate a dc current of particles at zero bias based on a noble interplay between coherence and decoherence. We show that a dc current arises if the transport process...
Floquet Formalism of Quantum Pumps (2004)
We review Floquet formalism of quantum electron pumps. In the Floquet formalism the quantum pump is regarded as a time dependent scattering system, which allows us to go beyond the adiabatic limit....
Decoherence from Internal Dynamics in Macroscopic Matter-Wave Interferometry (2003)
Kim, Sang Wook, Park, Hwa-Kyun
Usually, decoherence is generated from the coupling with an outer environment. However, a macroscopic object generically possesses its own environment in itself, namely the complicated dynamics of...
Quasibound states at thresholds in multichannel impurity scattering (2003)
Kim, Sang Wook, Park, Hwa-Kyun, Schomerus, Henning
We investigate the threshold behaviour of transmission resonances and quasibound states in the multichannel scattering problems of a one-dimensional (1D) time-dependent impurity potential, and the...
Quasibound states at thresholds in multichannel impurity scattering (2003)
Kim, Sang Wook, Park, Hwa-Kyun, Schomerus, Henning
We investigate the threshold behaviour of transmission resonances and quasibound states in the multichannel scattering problems of a one-dimensional (1D) time-dependent impurity potential, and the...
Quasibound states at thresholds in multichannel impurity scattering. (2003)
Kim, Sang Wook, Park, Hwa-Kyun, Schomerus, Henning
We investigate the threshold behaviour of transmission resonances and quasibound states in the multichannel scattering problems of a one-dimensional (1D) time-dependent impurity potential, and the...
Magnetic field inversion symmetry in quantum pumps with discrete symmetries (2002)
We investigate the magnetic field inversion symmetry of the pumped currents in quantum pumps with various discrete symmetries using Floquet scattering matrix approach. We found the pumped currents...
Pauli blocking factors in quantum pumps (2002)
We investigate the Pauli blocking factor in quantum pumps using Floquet formalism. Even though the time dependent potentials in quantum pumping can not only cause inelastic scatterings but also break...
Floquet scattering in parametric electron pumps (2002)
A Floquet scattering approach to parametric electron pumps is presented and compared with Brouwer's adiabatic scattering approach [Phys. Rev. B 58, R10135 (1998)] for a simple scattering model with...
Intrinsic decoherence and classical-quantum correspondence in two coupled delta-kicked rotors (2002)
Park, Hwa-Kyun, Kim, Sang Wook
We show that classical-quantum correspondence of center of mass motion in two coupled delta-kicked rotors can be obtained from intrinsic decoherence of the system itself which occurs due to the...
Kim, Sang Wook, Kim, Seunghwan
We investigate internal localized eigenmodes of the linearized equation around spin discrete breathers in 1D antiferromagnets with on-site easy axis anisotropy. The threshold of occurrence of the...
Quasibound states at thresholds in multichannel impurity scattering (2002)
Kim, Sang Wook, Park, Hwa-Kyun, Schomerus, Henning
We investigate the threshold behavior of transmission resonances and quasibound states in the multichannel scattering problems of a one dimensional (1D) time-dependent impurity potential, and the...
Decoherence-induced wave packet splitting (2001)
Chough, Young-Tak, Nha, Hyunchul, Kim, Sang Wook, Youn, Sun-Hyun, An, Kyungwon
We provide an intuitive interpretation of the optical Stern-Gerlach effect (OSGE) in the dressed-state point of view. We also analyze the effect of atomic damping in an experiment on the OSGE. We...
Observation of Scarred Modes in Asymmetrically Deformed Microcylinder Lasers (2001)
Lee, Sang-Bum, Lee, Jai-Hyung, Chang, Joon-Sung, Moon, Hee-Jong, Kim, Sang Wook, An, Kyungwon
We report observation of lasing in the scarred modes in an asymmetrically deformed microcavity made of liquid jet. The observed scarred modes correspond to morphology-dependent resonance of radial...
An ultrahigh-Q microsphere laser based on the evanescent-wave-coupled gain (2001)
Choi, Yong-Seok, Moon, Hee-Jong, Kim, Sang Wook, An, Kyungwon
We have demonstrated an ultrahigh-Q whispering-gallery-mode (WGM) microsphere laser based on the evanescent-wave-coupled gain. Dye molecules outside the sphere near the equator were excited,...
Squeezing enhancement by damping in a driven atom-cavity system (2001)
Nha, Hyunchul, Chough, Young-Tak, Kim, Sang Wook, An, Kyungwon
In a driven atom-cavity coupled system in which the two-level atom is driven by a classical field, the cavity mode which should be in a coherent state in the absence of its reservoir, can be squeezed...
Quantum Zeno Effect in Quantum Chaotic Systems (2000)
Kim, Sang Wook, Chough, Young-Tak, An, Kyungwon
We analyzed the effect of frequent measurements on the quantum systems that are chaotic in the classical limit. It is shown that the kicked rotator, a well-known example of quantum chaos, is too...
Dynamical localization and partial-barrier localization in the Paul trap (1999)
Kim, Sang Wook, Lee, Hai-Woong
©2000 The American Physical Society URL: http://link.aps.org/abstract/PRE/v61/p5124 DOI: 10.1103/PhysRevE.61.5124 PACS: 05.45.Mt, 03.65.Sq, 32.80.Lg
Kim, Sang Wook, Lee, Hai-Woong
©1999 The American Physical Society URL: http://link.aps.org/abstract/PRE/v59/p5384 DOI: 10.1103/PhysRevE.59.5384 PACS: 05.45.-a
Geology of the Middle Ordovician coticules of western New England /--Sang Wook Kim. (1974)
Typescript.
Die Leitgeschwindigkeit motorischer Nervenfasern des Nervus ulnaris im Verlauf eines Tages. (1967)
Würzburg, Med. F., Diss. v. 4. Dez. 1967.
Journey of a Swallowed Toothbrush to the Colon
Kim, In Hee, Kim, Hyun Chul, Koh, Kang Hun, Kim, Seong Hun, Kim, Sang Wook, Lee, Seung Ok, ...
Toothbrush swallowing is a rare event. Because no cases of spontaneous passage have been reported, prompt removal is recommended to prevent the development of complications. Most swallowed...
Repetitive response to gemcitabine that led to curative resection in cholangiocarcinoma
Kim, Seong Hun, Kim, In Hee, Kim, Sang Wook, Lee, Seung-Ok
This study reports a case of unresectable intrahepatic mass-forming cholangiocarcinoma which showed a dramatic response to gemcitabine that led to curative resection and a long-term survival of more...