255 citations · 1.1k across the 37 of their papers we have counts for
38 papers
Discrete time crystals and classical logic gates in coupled open Dicke models
Emmanuel D. G. U, Roy D. Jara, Jayson G. Cosme
We investigate the dynamics of coupled discrete time crystals (DTCs) in the coupled Dicke model or Dicke dimer (DD) with dissipation. By numerically simulating the mean-field dynam…
Time crystals in cavity-BEC systems
Jayson G. Cosme, Ludwig Mathey
The understanding of light-induced dynamical states continues to be a challenging and fruitful pursuit of science. This pursuit is supported by quantum simulation of dynamical phen…
Universal logic gates for coupled period-doubling systems
Emmanuel D. G. U, Roy D. Jara, Jayson G. Cosme
We propose a general architecture for universal logic operations using NAND and NOR gates on classical information encoded in period-doubled states of periodically-driven systems.…
Universality of dissipative discrete time crystal formation
Roy D. Jara, Jayson G. Cosme
We demonstrate that the Kibble-Zurek mechanism (KZM) holds for open systems transitioning from a disordered phase to a discrete time crystal (DTC). Specifically, we observe the cha…
Dynamics and fragmentation of bosons in an optical lattice inside a cavity using Wannier and position bases
Christopher Gerard R. Sevilla, Jayson G. Cosme
The atom-cavity system is a versatile platform for emulating light-matter systems and realizing dissipation-induced phases, such as limit cycles (LCs) and time crystals. Here, we s…
Controlled bit-flip of period-doubling and discrete time crystalline states in open systems
Roy D. Jara, Phatthamon Kongkhambut, Hans Keßler +2
In this work, we explore the robustness of a bit-flip operation against thermal and quantum noise for bits represented by the symmetry-broken pairs of the period-doubled (PD) state…
Observation of a zero-energy excitation mode in the open Dicke model
Anton Bolian, Phatthamon Kongkhambut, Christoph Georges +6
Approaching phase boundaries in many-body systems can give rise to intriguing signatures in their excitation spectra. Here, we explore the excitation spectrum of a Bose-Einstein co…
Torus bifurcation of a dissipative time crystal
Jayson G. Cosme, Phatthamon Kongkhambut, Anton Bölian +5
Using a quantum gas setup consisting of a Bose-Einstein condensate strongly coupled to a high-finesse optical cavity by a transverse pump laser, we experimentally observe an instab…
Apparent delay of the Kibble-Zurek mechanism in quenched open systems
Roy D. Jara, Jayson G. Cosme
We report a new intermediate regime in the quench time, , separating the usual validity of the Kibble-Zurek mechanism (KZM) and its breakdown for rapid quenches in open syst…
Impact of quantum noise on phase transitions in an atom-cavity system with limit cycles
Richelle Jade L. Tuquero, Jayson G. Cosme
Quantum fluctuations are inherent in open quantum systems and they affect not only the statistical properties of the initial state but also the time evolution of the system. Using…
Observation of a phase transition from a continuous to a discrete time crystal
Phatthamon Kongkhambut, Jayson G. Cosme, Jim Skulte +4
Discrete (DTCs) and continuous time crystals (CTCs) are novel dynamical many-body states, that are characterized by robust self-sustained oscillations, emerging via spontaneous bre…
Theory of parametric resonance for discrete time crystals in fully-connected spin-cavity systems
Roy D. Jara, Dennis F. Salinel, Jayson G. Cosme
We pinpoint the conditions necessary for discrete time crystal (DTC) formation in fully connected spin-cavity systems from the perspective of parametric resonance by mapping these…
Realizing limit cycles in dissipative bosonic systems
Jim Skulte, Phatthamon Kongkhambut, Hans Keßler +3
We propose a general mechanism for generating limit cycle (LC) oscillations by coupling a linear bosonic mode to a dissipative nonlinear bosonic mode. By analyzing the stability ma…
Dissipationless counterflow currents above T_c in bilayer superconductors
Guido Homann, Marios H. Michael, Jayson G. Cosme +1
We report the existence of dissipationless currents in bilayer superconductors above the critical temperature , assuming that the superconducting phase transition is dominated…
Quantum rotation sensor with real-time readout based on an atom-cavity system
Jim Skulte, Jayson G. Cosme, Ludwig Mathey
Using an atom-cavity platform, we propose to combine the effective gauge phase of rotated neutral atoms and the superradiant phase transition to build a highly sensitive and fast q…
Bridging closed and dissipative discrete time crystals in spin systems with infinite-range interactions
Jayson G. Cosme, Jim Skulte, Ludwig Mathey
We elucidate the role that the dissipation in a bosonic channel plays in the prevalence and stability of time crystals (TCs) in a periodically driven spin-boson system described by…
Condensate formation in a dark state of a driven atom-cavity system
Jim Skulte, Phatthamon Kongkhambut, Sahana Rao +4
We demonstrate condensate formation in a dark state in an ultracold quantum gas coupled to a high-finesse cavity and pumped by a shaken optical lattice. We show experimentally and…
Parametric control of Meissner screening in light-driven superconductors
Guido Homann, Jayson G. Cosme, Ludwig Mathey
We investigate the Meissner effect in a parametrically driven superconductor using a semiclassical lattice gauge theory. Specifically, we periodically drive the -axis tun…
Dissipative time crystal in an atom-cavity system: Influence of trap and competing interactions
Richelle Jade L. Tuquero, Jim Skulte, Ludwig Mathey +1
While the recently realized dissipative time crystal in a laser-pumped atom-cavity system in the experiment of Keßler et al. [Phys. Rev. Lett. 127, 043602 (2021)] is qualitatively…
Observation of a continuous time crystal
Phatthamon Kongkhambut, Jim Skulte, Ludwig Mathey +3
Time crystals are classified as discrete or continuous depending on whether they spontaneously break discrete or continuous time translation symmetry. While discrete time crystals…
Terahertz amplifiers based on gain reflectivity in cuprate superconductors
Guido Homann, Jayson G. Cosme, Ludwig Mathey
We demonstrate that parametric driving of suitable collective modes in cuprate superconductors results in a reflectivity for frequencies in the low terahertz regime. We propo…
Realization of a periodically driven open three-level Dicke model
Phatthamon Kongkhambut, Hans Keßler, Jim Skulte +3
A periodically driven open three-level Dicke model is realized by resonantly shaking the pump field in an atom-cavity system. As an unambiguous signature, we demonstrate the emerge…
Parametrically driven-dissipative three-level Dicke model
Jim Skulte, Phatthamon Kongkhambut, Hans Keßler +3
We investigate the three-level Dicke model, which describes a fundamental class of light-matter systems. We determine the phase diagram in the presence of dissipation, which we ass…
Vortex and soliton dynamics in particle-hole symmetric superfluids
Jim Skulte, Lukas Broers, Jayson G. Cosme +1
We propose to induce topological defects in particle-hole symmetric superfluids, with the prime example of the BCS state of ultracold atoms and detect their time evolution and deca…