scholarly journals Exact solvability and two-frequency Rabi oscillation in cavity-QED setup with moving emitter

2021 ◽  
Author(s):  
Mingzhu Weng ◽  
Zhihai Wang
Keyword(s):  
Energy Spectrum ◽  
Cavity Qed ◽  
Cavity Mode ◽  
Rabi Oscillation ◽  
Quantum Transition ◽  
Harmonic Potential ◽  
Dynamical Process ◽  
Exact Solvability ◽  
Dressed States ◽  
Potential Applications

Abstract In this paper, we investigate the energy spectrum and coherent dynamical process in a cavity-QED setup with a moving emitter, which is subject to a harmonic potential. We find that the vibration of the emitter will induce the effective Kerr and optomechanical interactions. With the assistance of Bogliubov operators approach, we obtain the energy spectrum of the system exactly. Furthermore, we show that the dynamics of the system exhibit a two-frequency Rabi oscillation behavior. We explain such behavior by optomechanical interaction induced quantum transition between emitter-cavity dressed states. We hope that the interaction between cavity mode and moving emitter will provide a versatile platform to explore more exotic effects and potential applications in cavity-QED scenario.

A SCHEME FOR IMPLEMENTATION OF DENSE CODING WITH W-CLASS STATES IN CAVITY QED

2009 ◽  
Vol 07 (01) ◽  
pp. 307-312 ◽  
Author(s):  
LIU YE ◽  
JUAN HE
Keyword(s):  
Cavity Qed ◽  
Cavity Mode ◽  
Dense Coding ◽  
Cavity Field ◽  
Quantum Dense Coding ◽  
Atomic States

An experimentally feasible scheme for implementing quantum dense coding in cavity QED is proposed. In the scheme a W-class state can first be prepared by letting the atoms interact simultaneously with a highly detuned cavity mode. Then the states coded on this W-class state can be exactly distinguished by detecting atomic states. The scheme is insensitive to the cavity field, and the quantum dense coding can be realized in a simple way.

DECOHERENCE-FREE MULTIPARTITE ATOMIC ENTANGLEMENT IN A CAVITY QED SYSTEM

2009 ◽  
Vol 07 (supp01) ◽  
pp. 229-235 ◽  
Author(s):  
MATTEO BINA ◽  
FEDERICO CASAGRANDE ◽  
ALFREDO LULLI
Keyword(s):  
Cavity Qed ◽  
Cavity Mode ◽  
Cavity Field ◽  
Analytical Results ◽  
Atomic Subsystem ◽  
Atomic Entanglement ◽  
Decoherence Free Subspaces

We present analytical results on entanglement and decoherence in a system of N strongly driven two-level atoms resonantly coupled to a dissipative cavity mode. In the specific cases of N = 3 and 4 qubits we show the existence of decoherence-free subspaces for the whole system and/or the atomic subsystem and we discuss examples where a multipartite qubit entanglement remains preserved. Also we illustrate the conditional preparation of cat-like states of the cavity field and the generation of atomic correlations.

scholarly journals Coexisting spin and Rabi oscillations at intermediate time regimes in electron transport through a photon cavity

2019 ◽  
Vol 10 ◽  
pp. 606-616 ◽  
Author(s):  
Vidar Gudmundsson ◽  
Hallmann Gestsson ◽  
Nzar Rauf Abdullah ◽  
Chi-Shung Tang ◽  
Andrei Manolescu ◽  
...  
Keyword(s):  
Rabi Oscillation ◽  
Photon Number ◽  
Far Infrared ◽  
Transverse Magnetic ◽  
Double Quantum ◽  
Rabi Oscillations ◽  
Dressed States ◽  
Transient Source ◽  
Intermediate Time ◽  
Dependent Transport

In this work, we theoretically model the time-dependent transport through an asymmetric double quantum dot etched in a two-dimensional wire embedded in a far-infrared (FIR) photon cavity. For the transient and the intermediate time regimes, the current and the average photon number are calculated by solving a Markovian master equation in the dressed-states picture, with the Coulomb interaction also taken into account. We predict that in the presence of a transverse magnetic field the interdot Rabi oscillations appearing in the intermediate and transient regime coexist with slower non-equilibrium fluctuations in the occupation of states for opposite spin orientation. The interdot Rabi oscillation induces charge oscillations across the system and a phase difference between the transient source and drain currents. We point out a difference between the steady-state correlation functions in the Coulomb blocking and the photon-assisted transport regimes.

Two electrons in a simple harmonic potential

2006 ◽  
Vol 84 (3) ◽  
pp. 181-192 ◽  
Author(s):  
S H Patil ◽  
Y P Varshni
Keyword(s):  
Wave Function ◽  
Energy Spectrum ◽  
Structural Properties ◽  
Model Potential ◽  
Harmonic Potential ◽  
Energy Eigenvalues ◽  
Model Wave Function ◽  
Model Wave ◽  
Physical Insight ◽  
Insight Into

Some structural properties of energy eigenfunctions of two electrons in a simple harmonic potential are analyzed. Simple expressions are obtained for the energy spectrum based on a model potential, and on a model wave function. These expressions give accurate values for the energy eigenvalues and provide a physical insight into their structure.PACS Nos.: 3.65.Ge, 73.21.La, 78.67.Hc

scholarly journals Thermodynamics of ultrastrongly coupled light-matter systems

Quantum ◽  
2020 ◽  
Vol 4 ◽  
pp. 335 ◽  
Author(s):  
Philipp Pilar ◽  
Daniele De Bernardis ◽  
Peter Rabl
Keyword(s):  
Cavity Mode ◽  
Black Body ◽  
Significant Shift ◽  
Thermodynamic Quantities ◽  
Fundamental Interest ◽  
Ferroelectric Phase Transition Temperature ◽  
Potential Applications ◽  
Electric Susceptibility ◽  
Single Cavity ◽  
Single Cavity Mode

We study the thermodynamic properties of a system of two-level dipoles that are coupled ultrastrongly to a single cavity mode. By using exact numerical and approximate analytical methods, we evaluate the free energy of this system at arbitrary interaction strengths and discuss strong-coupling modifications of derivative quantities such as the specific heat or the electric susceptibility. From this analysis we identify the lowest-order cavity-induced corrections to those quantities in the collective ultrastrong coupling regime and show that for even stronger interactions the presence of a single cavity mode can strongly modify extensive thermodynamic quantities of a large ensemble of dipoles. In this non-perturbative coupling regime we also observe a significant shift of the ferroelectric phase transition temperature and a characteristic broadening and collapse of the black-body spectrum of the cavity mode. Apart from a purely fundamental interest, these general insights will be important for identifying potential applications of ultrastrong-coupling effects, for example, in the field of quantum chemistry or for realizing quantum thermal machines.

TELEPORTATION WITHOUT JOINT MEASUREMENT IN CAVITY QED

2006 ◽  
Vol 20 (19) ◽  
pp. 1183-1189
Author(s):  
ZHENG-YUAN XUE ◽  
YOU-MIN YI ◽  
ZHUO-LIANG CAO
Keyword(s):  
Quantum Electrodynamics ◽  
Cavity Qed ◽  
Cavity Mode ◽  
Bell State ◽  
Cavity Quantum Electrodynamics ◽  
Atomic State ◽  
Joint Measurement ◽  
Bell State Measurement ◽  
State Measurement

Schemes for the teleporting of the cavity mode state and the unknown atomic state are proposed in cavity quantum electrodynamics (QED) without joint Bell-state measurement (BSM). The presented schemes are implemented with separate atomic measurements instead of any type of joint measurement. The discussion of the scheme indicates that it can be realized by current technologies.

PROBABILISTIC TELEPORTATION OF A TWO-ATOM ENTANGLED STATE IN CAVITY QED

2008 ◽  
Vol 22 (13) ◽  
pp. 2129-2137
Author(s):  
JIN-MING LIU ◽  
YI-CAI WANG ◽  
XIAO-QI XIAO
Keyword(s):  
Quantum Channel ◽  
Cavity Qed ◽  
Thermal Field ◽  
Cavity Mode ◽  
Resonant Cavity ◽  
Success Probability ◽  
Entangled State ◽  
Probabilistic Teleportation ◽  
Cavity Decay ◽  
Partially Entangled State

We present two schemes for probabilistically teleporting a two-atom entangled state using a three-atom partially entangled state as the quantum channel in cavity QED with the help of separate atomic measurements. The first scheme is only based on the interaction between two driven atoms and a quantized cavity mode in the large detuning limit, so the effects of both cavity decay and the thermal field are eliminated. In the second scheme, it is necessary to introduce an additional resonant cavity besides the thermal cavity to realize the teleportation, and the corresponding success probability is improved.

scholarly journals Cavity-QED assisted attraction between a cavity mode and an exciton mode in a planar photonic-crystal cavity

2010 ◽  
Vol 18 (3) ◽  
pp. 2719 ◽  
Author(s):  
T. Tawara ◽  
H. Kamada ◽  
T. Tanabe ◽  
T. Sogawa ◽  
H. Okamoto ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Cavity Qed ◽  
Cavity Mode ◽  
Photonic Crystal Cavity ◽  
Exciton Mode

ENTANGLEMENT GENERATION WITH GEOMETRIC OPERATIONS IN CAVITY QED

2009 ◽  
Vol 23 (13) ◽  
pp. 1619-1624
Author(s):  
GANG ZHANG ◽  
PING DONG ◽  
ZHUO-LIANG CAO
Keyword(s):  
Spontaneous Emission ◽  
Cavity Qed ◽  
Laser Power ◽  
Cavity Mode ◽  
Thermal State ◽  
Cluster State ◽  
Entanglement Generation ◽  
State Generation ◽  
One Step ◽  
Geometric Nature

We propose a one-step cluster state generation scheme via atomic cavity QED. The current scheme is insensitive to the cavity mode thermal state as well as the atomic spontaneous emission since the gate operations are independent of the cavity mode states and laser power is sufficiently weak. In addition, the needed operation is of geometric nature, so it is robust against random operation errors.

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