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Superconducting circuits provide a new platform to study nonstationary cavity QED phenomena. An example of such a phenomenon is a dynamical Lamb effect which is a parametric excitation of an atom due to the nonadiabatic modulation of its…

Mesoscale and Nanoscale Physics · Physics 2016-06-28 A. A. Zhukov , D. S. Shapiro , W. V. Pogosov , Yu. E. Lozovik

We present a theoretical and experimental study of photonic and electronic transport properties of a voltage biased InAs semiconductor double quantum dot (DQD) that is dipole-coupled to a superconducting transmission line resonator. We…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 Manas Kulkarni , Ovidiu Cotlet , Hakan E. Türeci

The transition between the class-B and class-A dynamical behaviors of a semiconductor laser is directly observed by continuously controlling the lifetime of the photons in a cavity of sub-millimetric to centimetric length. It is…

We demonstrate theoretically the use of genetic learning algorithms to coherently control the dynamics of a Bose-Einstein condensate. We consider specifically the situation of a condensate in an optical lattice formed by two…

Soft Condensed Matter · Physics 2009-11-07 S. Potting , M. Cramer , P. Meystre

We study a protocol for constructing a squeezed atom laser for a model originating from the generalized uncertainty principle. We show that the squeezing effects arising from such systems do not require any squeezed light as an input, but…

Quantum Physics · Physics 2019-08-29 Sanjib Dey , Véronique Hussin

We investigate the dynamics of a lasing system driven by a current of bosonic (quasi-)particles via a dissipative three-mode mixing process. A semi-classical analysis of this system predicts distinct dynamical regimes, where both the cavity…

Quantum Physics · Physics 2026-03-30 Louis Garbe , Peter Rabl

Motivated by recent ``circuit QED'' experiments we study the lasing transition and spectral properties of single-qubit lasers. In the strong coupling, low-temperature regime quantum fluctuations dominate over thermal noise and strongly…

Mesoscale and Nanoscale Physics · Physics 2010-11-09 Stephan André , Pei-Qing Jin , Valentina Brosco , Jared H. Cole , Alessandro Romito , Alexander Shnirman , Gerd Schön

A laser-atom interaction simulator derived from quantum electrodynamics (LASED) is presented, which has been developed in the python programming language. LASED allows a user to calculate the time evolution of a laser-excited atomic system.…

Atomic Physics · Physics 2022-06-02 Manish Patel , Matthew Harvey , Andrew James Murray

Optical lattice clock systems with ultra-cold strontium-88 atoms have been used to demonstrate superradiant lasing and magnetic field-controlled optical transmission. We explain these phenomena theoretically with a rigorous model for…

Quantum Physics · Physics 2021-03-31 Yuan Zhang , Chong Xin Shan , Klaus Mølmer

Cavity-mediated cooling of the center--of--mass motion of a transversally, coherently pumped atom along the axis of a high--Q cavity is studied. The internal dynamics of the atomic dipole strongly coupled to the cavity field is treated by a…

Quantum Physics · Physics 2007-05-23 Peter Domokos , Thomas Salzburger , Helmut Ritsch

In the paper a model of a single-atom laser with incoherent pumping is theoretically investigated. In the stationary case, a linear homogeneous differential equation for the phase-averaged Hussimi Q-function is derived from the equation for…

Quantum Physics · Physics 2022-05-11 Nikolay V. Larionov

We present a fully electronic analogue of coherent population trapping in quantum optics, based on destructive interference of single-electron tunneling between three quantum dots. A large bias voltage plays the role of the laser…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 B. Michaelis , C. Emary , C. W. J. Beenakker

A cold dilute atomic gas in an optical resonator can be radiatively cooled by coherent scattering processes when the driving laser frequency is tuned close but below the cavity resonance. When sufficiently illuminated, moreover, the atoms'…

A new method is proposed to produce population inversion on transitions involving the ground state of atoms. The method is realized experimentally with sodium atoms. Lasing at the frequency corresponding to the sodium D_2 line is achieved…

We demonstrate lasing into counter-propagating modes of a ring cavity using a gas of cold atoms as a gain medium. The laser operates under the usual conditions of magneto-optical trapping with no additional fields. We characterize the…

Atomic Physics · Physics 2018-10-24 Balazs Megyeri , Graeme Harvie , Andreas Lampis , Jon Goldwin

We show that the physics underlying the dynamical Casimir effect may generate multipartite quantum correlations. To achieve it, we propose a circuit quantum electrodynamics (cQED) scenario involving superconducting quantum interference…

Quantum Physics · Physics 2015-06-18 S. Felicetti , M. Sanz , L. Lamata , G. Romero , G. Johansson , P. Delsing , E. Solano

We develop a full quantum-optical approach for optical self-feedback of a microcavity laser. These miniaturized devices work in a regime between the quantum and classical limit and are test-beds for the differences between a quantized…

The ability to apply GHz frequencies to control the quantum state of a single $P$ atom is an essential requirement for the fast gate pulsing needed for qubit control in donor based silicon quantum computation. Here we demonstrate this with…

Motivated by recent experiments, which demonstrated lasing and cooling of the electromagnetic field in an electrical resonator coupled to a superconducting qubit, we study the phase coherence and diffusion of the system in the lasing state.…

Mesoscale and Nanoscale Physics · Physics 2009-08-26 Stephan André , Valentina Brosco , Alexander Shnirman , Gerd Schön

A cavity-free laser in the sky could lead to revolutionary improvements in optical remote sensing for atmospheric science. Abundant in air, nitrogen molecules are prime candidates as an active medium for such a laser. Nitrogen molecules,…