From the 1 of 12 linked papers with an AI index.
12 papers
Collective-State Preparation in a Subwavelength Triangular Trimer Using SUPER Excitation
Thomas Nunner, Johannes Kerber, Helmut Ritsch +1
The paper extends the SUPER (Swing‑UP of quantum EmitteR population) scheme to a subwavelength equilateral triangular arrangement of three dipole‑coupled quantum emitters, showing…
Continuous Narrow-Linewidth Superradiance in Waveguide QED
Anna Bychek, Martin Fasser, Ivan Vybornyi +4
Superradiant lasers promise continuous, narrow-linewidth coherent emission at the bare atomic transition frequency, enabling frequency references of exceptional precision. Recent e…
Environment-Enhanced Single-Photon Absorption in a Nano-Ring of Dipole-Coupled Quantum Emitters
Eric Sánchez-Llorente, Helmut Ritsch, Maria Moreno-Cardoner
Decoherence is mostly detrimental in quantum information and quantum optics applications. However, the interplay between environment-induced incoherent dynamics and unitary evoluti…
Frequency shifts heralding ground state squeezing and entanglement of two coupled harmonic oscillators
Safoura Mirkhalaf, Helmut Ritsch, Karol Gietka
It is often argued that two linearly coupled quantum harmonic oscillators, even when cooled to their ground state, display no inherently quantum features beyond quantized energy le…
The Cumulants Expansion Approach: The Good, The Bad and The Ugly
Johannes Kerber, Helmut Ritsch, Laurin Ostermann
The configuration space, i.e. the Hilbert space, of compound quantum systems grows exponentially with the number of its subsystems: its dimensionality is given by the product of th…
Nanoscale Mirrorless Superradiant Lasing
Anna Bychek, Raphael Holzinger, Helmut Ritsch
We predict collective 'free-space' lasing in a dense nanoscopic emitter arrangement where dipole-dipole coupled atomic emitters synchronize their emission and exhibit lasing behavi…