Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

The Japan Society of Applied Physics

Full-quantum-mechanical theory of synchronization of polarizations in a coupled photon-electron system

Riku Sezaki, Kiyoshi Kobayashi, Kensuke Miyajima, Akira Ishikawa

Published Jul 9, 2020• 0 citations
OpenAlex

Related papers

Theory of synchronization of polarizations via a photon field in a cavity QED system

Riku Sezaki, Akira Ishikawa, Kensuke Miyajima +1 more

The Japan Society of Applied Physics•Jan 28, 2020•0 citations

A quantum target detection using polarized photons

Xiaofei Wang, Bing Zhu

Electromagnetic waves with polarization modulation are widely utilized in Radar and Lidar, depending on classical mechanics and Shannon information theory. In this paper, a quantum detection system using polarized photons has been studied on theory and experiments based on the laws of quantum electrodynamics. We give emphasis on the limits: standard quantum limit(SQL) and quantum limit (QL) for target detection. Two sets photons of orthogonal 653nm linearly polarized beams: 0°,90°,45° and 135° transmit to the target,and detect the scattered photons 5.7 meters away. Transmitter and Receiver synchronize their clocks to suppress the noise by the time filtering.For some targets, our system can achieve utterly confidential target detection in theory.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Nov 29, 2012•0 citations

Input-output theory of cavities in the ultrastrong coupling regime: The case of time-independent cavity parameters

Cristiano Ciuti, Iacopo Carusotto

We present a full quantum theory for the dissipative dynamics of an optical cavity in the ultrastrong light-matter coupling regime, in which the vacuum Rabi frequency is a significant fraction of the active electronic transition frequency and the antiresonant terms of the light-matter coupling play an important role. In particular, our model can be applied to the case of intersubband transitions in doped semiconductor quantum wells embedded in a microcavity. The coupling of the intracavity photonic mode and of the electronic polarization to the external, frequency-dependent, dissipation baths is taken into account by means of quantum Langevin equations in the input-output formalism. In the case of a time-independent vacuum Rabi frequency, exact analytical expressions for the operators are obtained, which allows us to characterize the quantum dissipative response of the cavity to an arbitrary initial condition (vacuum, coherent field, thermal excitation). For a vacuum input in both the photonic and electronic polarization modes, the ground state of the cavity system is a two-mode squeezed vacuum state with a finite population in both photonic and electronic modes. These excitations are, however, virtual and cannot escape from the cavity: for a vacuum input, a vacuum output is found, without any trace of the intracavity squeezing. For a coherent photonic input the linear optical response spectra (reflectivity, absorption, transmission) have been studied, and signatures of the ultrastrong coupling have been identified in the asymmetric and peculiar anticrossing of the polaritonic eigenmodes. Finally, we have calculated the electroluminescence spectra in the case of an incoherent electronic input: the emission intensity in the ultrastrong coupling regime results in being significantly enhanced as compared to the case of an isolated quantum well without a surrounding cavity.

arXiv:cond-mat/0606554•Physical Review A•Sep 18, 2006•283 citations

Synchronizing microwave cQED limit-cycle oscillators

Cecilie Hermansen, Jens Paaske

Self-sustained oscillators play a central role in the stabilization and synchronization of complex dynamical systems. A number of different physical systems are currently being investigated to clarify the importance of such active components in the quantum realm. Here we explore the properties of a driven dissipative electron-photon hybrid system based on superconducting microwave resonators coupled resonantly to a voltage-biased double quantum dot (DQD). First, we establish a Hopf bifurcation at a critical value of the electron-photon coupling, beyond which an effective negative friction sustains steady limit-cycle oscillations of individual resonators. Second, we show that two such limit-cycle resonators coupled via the same voltage-biased DQD synchronize for small enough frequency detuning. A nonlinear photon Keldysh action is derived by perturbation theory in the effective circuit fine-structure constant, and the limit-cycle dynamics is analyzed in terms of resulting saddle-point, and Fokker-Planck equations. In the Markovian limit of infinite bias voltage, these results are shown to agree well with the solution of a corresponding Lindblad master equation for the DQD resonator system.

cond-mat.mes-hallCross-listedarXiv:2511.07140•Physical review. B./Physical review. B•Nov 11, 2025•0 citations

A QUANTUM THEORY OF THE COHERENCE AND POLARIZATION OF LIGHT

Keh Pann

•Jan 1, 1969•0 citations

“POLARIZATION” OF A PHOTON IN QUANTUM THEORY

Elsevier eBooks•Jan 1, 1973•0 citations
Electromagnetic waves with polarization modulation are widely utilized in Radar and Lidar, depending on classical mechanics and Shannon information theory. In this paper, a quantum detection system using polarized photons has been studied on theory and experiments based on the laws of quantum electrodynamics. We give emphasis on the limits: standard quantum limit(SQL) and quantum limit (QL) for target detection. Two sets photons of orthogonal 653nm linearly polarized beams: 0°,90°,45° and 135° transmit to the target,and detect the scattered photons 5.7 meters away. Transmitter and Receiver synchronize their clocks to suppress the noise by the time filtering.For some targets, our system can achieve utterly confidential target detection in theory.
We present a full quantum theory for the dissipative dynamics of an optical cavity in the ultrastrong light-matter coupling regime, in which the vacuum Rabi frequency is a significant fraction of the active electronic transition frequency and the antiresonant terms of the light-matter coupling play an important role. In particular, our model can be applied to the case of intersubband transitions in doped semiconductor quantum wells embedded in a microcavity. The coupling of the intracavity photonic mode and of the electronic polarization to the external, frequency-dependent, dissipation baths is taken into account by means of quantum Langevin equations in the input-output formalism. In the case of a time-independent vacuum Rabi frequency, exact analytical expressions for the operators are obtained, which allows us to characterize the quantum dissipative response of the cavity to an arbitrary initial condition (vacuum, coherent field, thermal excitation). For a vacuum input in both the photonic and electronic polarization modes, the ground state of the cavity system is a two-mode squeezed vacuum state with a finite population in both photonic and electronic modes. These excitations are, however, virtual and cannot escape from the cavity: for a vacuum input, a vacuum output is found, without any trace of the intracavity squeezing. For a coherent photonic input the linear optical response spectra (reflectivity, absorption, transmission) have been studied, and signatures of the ultrastrong coupling have been identified in the asymmetric and peculiar anticrossing of the polaritonic eigenmodes. Finally, we have calculated the electroluminescence spectra in the case of an incoherent electronic input: the emission intensity in the ultrastrong coupling regime results in being significantly enhanced as compared to the case of an isolated quantum well without a surrounding cavity.
Self-sustained oscillators play a central role in the stabilization and synchronization of complex dynamical systems. A number of different physical systems are currently being investigated to clarify the importance of such active components in the quantum realm. Here we explore the properties of a driven dissipative electron-photon hybrid system based on superconducting microwave resonators coupled resonantly to a voltage-biased double quantum dot (DQD). First, we establish a Hopf bifurcation at a critical value of the electron-photon coupling, beyond which an effective negative friction sustains steady limit-cycle oscillations of individual resonators. Second, we show that two such limit-cycle resonators coupled via the same voltage-biased DQD synchronize for small enough frequency detuning. A nonlinear photon Keldysh action is derived by perturbation theory in the effective circuit fine-structure constant, and the limit-cycle dynamics is analyzed in terms of resulting saddle-point, and Fokker-Planck equations. In the Markovian limit of infinite bias voltage, these results are shown to agree well with the solution of a corresponding Lindblad master equation for the DQD resonator system.