Simon B. Jäger

National Institute of Standards and Technology

Spontaneous emissionPhase (waves)OpticsPhysicsLaser linewidthPhase transitionPhotonDipoleHamiltonian (quantum mechanics)Atomic physicsField (physics)Optical cavityScatteringMaterials scienceMean field theoryCondensed matter physicsAtomic beamSteady stateSuperradianceMolecular physicsLaserSemiclassical physicsQuantumMetastabilityDissipative system

25Publications

8H-index

135Citations

Publications 23

#1Simon B. JägerH-Index: 8

#2Haonan LiuH-Index: 2

Last. Murray HollandH-Index: 46

view all 4 authors...

We study the collective emission of a beam of atomic dipoles into an optical cavity. Our focus lies on the effect of a finite detuning between the atomic transition frequency and the cavity resonance frequency. By developing a theoretical description of the coupled atom-cavity dynamics we analyze the stationary atomic configurations including a superradiant phase where the atoms undergo continuous monochromatic collective emission. In addition, we derive an analytical formula for the cavity pull...

#1Simon B. JägerH-Index: 8

#2Haonan LiuH-Index: 2

Last. Murray HollandH-Index: 46

view all 5 authors...

#1Haonan LiuH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Murray HollandH-Index: 46

view all 7 authors...

#1Michael KaicherH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Frank K. WilhelmH-Index: 44

view all 3 authors...

We present explicit expressions for the central piece of a variational method developed by Shi et al. which extends variational wave functions that are efficiently computable on classical computers beyond mean-field to generalized Gaussian states [1]. In particular, we derive iterative analytical expressions for the evaluation of expectation values of products of fermionic creation and annihilation operators in a Grassmann variable-free representation. Using this result we find a closed expressi...

#1Simon B. JägerH-Index: 8

#2Haonan LiuH-Index: 2

Last. Murray HollandH-Index: 46

view all 5 authors...

We theoretically analyze the collective dynamics of a thermal beam of atomic dipoles that couple to a single mode when traversing an optical cavity. For this setup we derive a semiclassical model and determine the onset of superradiant emission and its stability. We derive analytical expressions for the linewidth of the emitted light and compare them with numerical simulations. In addition, we find and predict two different superradiant phases; a steady-state superradiant phase and a multi-compo...

#1John P. BartolottaH-Index: 4

#2Simon B. JägerH-Index: 8

Last. Murray HollandH-Index: 46

view all 7 authors...

In the field of light-matter interactions, it is often assumed that a classical light field that interacts with a quantum particle remains almost unchanged and thus contains nearly no information about the manipulated particles. To investigate the validity of this assumption, we develop and theoretically analyze a simple Gedankenexperiment which involves the interaction of a coherent state with a quantum particle in an optical cavity. We quantify the resulting alteration of the light field by me...

#1Athreya ShankarH-Index: 7

#2Jarrod T. ReillyH-Index: 2

Last. Murray HollandH-Index: 46

view all 4 authors...

We show that the onset of steady-state superradiance in a bad cavity laser is preceded by a dissipative phase transition between two distinct phases of steady-state subradiance. The transition is marked by a non-analytic behavior of the cavity output power and the mean atomic inversion, as well as a discontinuity in the variance of the collective atomic inversion. In particular, for repump rates below a critical value, the cavity output power is strongly suppressed and does not increase with the...

#1Haonan LiuH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Travis Nicholson (NUS: National University of Singapore)H-Index: 10

view all 7 authors...

We propose a new type of superradiant laser based on a hot atomic beam traversing an optical cavity. We show that the theoretical minimum linewidth and maximum power are competitive with the best ultracoherent clock lasers. Also, our system operates naturally in continuous wave mode, which has been elusive for superradiant lasers so far. Unlike existing ultracoherent lasers, our design is simple and rugged. This makes it a candidate for the first widely accessible ultracoherent laser, as well as...

#1Haonan LiuH-Index: 2

#2Simon B. JägerH-Index: 8

Last. Travis NicholsonH-Index: 10

view all 7 authors...

We propose a steady-state, ultracoherent laser based on superradiance from a hot atomic beam traversing an optical cavity. Our design is considerably simpler than existing ultrastable lasers due to its uncomplicated atomic source and straightforward cavity. Nevertheless, its minimum linewidth and maximum output power are competitive with the best narrow-linewidth light sources. We show that, because of atomic phase synchronization, the phase of the output light is robust against decoherence aris...

#1Simon B. JägerH-Index: 8

#2Haonan LiuH-Index: 2

Last. Murray HollandH-Index: 46

view all 5 authors...

We investigate the different emission regimes of a pre-excited and collimated atomic beam passing through an optical cavity. In the regime where the cavity degrees of freedom can be adiabatically eliminated, we find that the atoms undergo superradiant emission if the collective linewidth exceeds transit-time broadening. We analyze the case where the atomic beam is not precisely perpendicular to the cavity axis and find a phase of continuous light emission similar to steady-state superradiance fo...

Close Researchers

Giovanna Morigi

H-index : 34

Murray Holland

H-index : 46

Stefan Schütz

H-index : 8

Minghui Xu

H-index : 8

Haonan Liu

H-index : 2

John Cooper

H-index : 61

Athreya Shankar

H-index : 7