616 citations · 3.5k across the 73 of their papers we have counts for
25 papers · 1 filter
Synthetic gauge potentials for the dark state polaritons in atomic media
Yu-Hung Kuan, Siang-Wei Shao, I-Kang Liu +4
The quest of utilizing neutral particles to simulate the behaviour of charged particles in a magnetic field makes the generation of artificial magnetic field of great interest. The…
Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes
Hamid Reza Hamedi, Julius Ruseckas, Emmanuel Paspalakis +1
We study the formation of off-axis optical vortices propagating inside a double-Raman gain atomic medium. The atoms interact with two weak probe fields as well as two strong pump b…
Complete energy conversion between light beams carrying orbital angular momentum using coherent population trapping for a coherently driven double-Λatom-light coupling
Hamid Reza Hamedi, Emmanuel Paspalakis, Giedrius Žlabys +2
We propose a procedure to achieve a complete energy conversion between laser pulses carrying orbital angular momentum (OAM) in a cloud of cold atoms characterized by a double-Λatom…
Quantum dynamics in potentials with fast spatial oscillations
Viktor Novičenko, Julius Ruseckas, Egidijus Anisimovas
We consider quantum dynamics of systems with fast spatial modulation of the Hamiltonian. Employing the formalism of supersymmetric quantum mechanics and decoupling fast and slow sp…
Transfer of optical vortices in coherently prepared media
Hamid Reza Hamedi, Julius Ruseckas, Emmanuel Paspalakis +1
We consider transfer of optical vortices between laser pulses carrying orbital angular momentum (OAM) in a cloud of cold atoms characterized by the configuration of the atom-li…
Nonlinear quantum optics for spinor slow light
J. Ruseckas, V. Kudriašov, A. Mekys +3
We investigate quantum nonlinear effects at a level of individual quanta in a double tripod atom-light coupling scheme involving two atomic Rydberg states. In such a scheme the slo…
Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and atom-light coupling scheme
H. R. Hamedi, J. Ruseckas, G. Juzeliūnas
We consider propagation of a probe pulse in an atomic medium characterized by a combined tripod and Lambda () atom-light coupling scheme. The scheme involves three atomic ground…
Creation of two-photon states via interactions between Rydberg atoms during light storage
J. Ruseckas, I. A. Yu, G. Juzeliūnas
We propose a new method to create two-photon states in a controllable way using interaction between the Rydberg atoms during the storage and retrieval of slow light. A distinctive…
Superluminal two-color light in multiple Raman gain medium
V. Kudriašov, J. Ruseckas, A. Mekys +3
We investigate theoretically the formation of two-component light with superluminal group velocity in a medium controlled by four Raman pump fields. In such an optical scheme only…
Experimental demonstration of spinor slow light
Meng-Jung Lee, Julius Ruseckas, Chin-Yuan Lee +5
Slow light based on the effect of electromagnetically induced transparency is of great interest due to its applications in low-light-level nonlinear optics and quantum information…
Optical vortices of slow light using tripod scheme
J. Ruseckas, A. Mekys, G. Juzeliunas
We consider propagation, storing and retrieval of slow light (probe beam) in a resonant atomic medium illuminated by two control laser beams of larger intensity. The probe and two…
Photonic band-gap properties for two-component slow light
J. Ruseckas, V. Kudriasov, G. Juzeliunas +3
We consider two-component "spinor" slow light in an ensemble of atoms coherently driven by two pairs of counterpropagating control laser fields in a double tripod-type linkage sche…
Slow polaritons with orbital angular momentum in atomic gases
J. Ruseckas, A. Mekys, G. Juzeliunas
Polariton formalism is applied for studying the propagation of a probe field of light in a cloud of cold atoms influenced by two control laser beams of larger intensity. The laser…
Spinor Slow-Light and Dirac particles with variable mass
R. G. Unanyan, J. Otterbach, M. Fleischhauer +3
We consider the interaction of two weak probe fields of light with an atomic ensemble coherently driven by two pairs of standing wave laser fields in a tripod-type linkage scheme.…
Effective magnetic fields for stationary light
J. Otterbach, J. Ruseckas, R. G. Unanyan +2
We describe a method to create effective gauge potentials for stationary-light polaritons in two or three spatial dimensions. When stationary light is created in the interaction wi…
Quantum Trajectory method for the Quantum Zeno and anti-Zeno effects
J. Ruseckas, B. Kaulakys
We perform stochastic simulations of the quantum Zeno and anti-Zeno effects for two level system and for the decaying one. Instead of simple projection postulate approach, a more r…
Effective magnetic fields induced by EIT in ultra-cold atomic gases
G. Juzeliunas, J. Ruseckas, P. Ohberg
We study the influence of two resonant laser beams (to be referred to as the control and probe beams) on the centre of mass motion of ultra-cold atoms characterised by three energy…
Time problem in quantum mechanics and its analysis by the concept of weak measurement
J. Ruseckas, B. Kaulakys
The model of weak measurements is applied to various problems, related to the time problem in quantum mechanics. The review and generalization of the theoretical analysis of the ti…
General expression for the quantum Zeno and anti-Zeno effects
J. Ruseckas, B. Kaulakys
In this paper we investigate the quantum Zeno and anti-Zeno effects without using any particular model of the measurement. Making a few assumptions about the measurement process we…
Weak measurement of arrival time
J. Ruseckas, B. Kaulakys
The arrival time probability distribution is defined by analogy with the classical mechanics. The difficulty of requirement to have the values of non-commuting operators is circumv…
Influence of the detector's temperature on the quantum Zeno effect
Julius Ruseckas
In this paper we study the quantum Zeno effect using the irreversible model of the measurement. The detector is modeled as a harmonic oscillator interacting with the environment. T…
Influence of the finite duration of the measurement on the quantum Zeno effect
Julius Ruseckas
We analyze the influence of the finite duration of the measurement on the quantum Zeno effect, using a simple model of the measurement. It is shown that the influence of the finite…
Time problem in quantum mechanics and weak measurements
J. Ruseckas, B. Kaulakys
A question of the time the system spends in the specified state, when the final state of the system is given, is raised. The model of weak measurements is used to obtain the expres…
Real measurements and Quantum Zeno effect
Julius Ruseckas, B. Kaulakys
In 1977, Mishra and Sudarshan showed that an unstable particle would never be found decayed while it was continuously observed. They called this effect the quantum Zeno effect (or…