Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Groiseau, Caspar"'
Publikováno v:
PRX Quantum 5, 010312 (2024)
We present a proposal for a tunable source of single photons operating in the terahertz (THz) regime. This scheme transforms incident visible photons into quantum THz radiation by driving a single polar quantum emitter with an optical laser, with its
Externí odkaz:
http://arxiv.org/abs/2305.11754
Autor:
Bolik, Nikolai, Groiseau, Caspar, Clark, Jerry H., Summy, Gil S., Liu, Yingmei, Wimberger, Sandro
Publikováno v:
Phys. Rev. A 106, 043318 (2022)
We present a concrete theoretical proposal for detecting topological phase transitions in double kicked atom-optics kicked rotors with internal spin-1/2 degree of freedom. The implementation utilizes a kicked Bose-Einstein condensate evolving in one-
Externí odkaz:
http://arxiv.org/abs/2210.11898
Publikováno v:
Fluctuation and Noise Letters, online ready (2022)
We investigate the possibility of implementing a sequence of quantum walks whose probability distributions give an overall positive winning probability, while it is negative for the single walks (Parrondo's paradox). In particular, we have in mind an
Externí odkaz:
http://arxiv.org/abs/2209.12622
Autor:
Bolik, Nikolai, Groiseau, Caspar, Clark, Jerry H., Gresch, Alexander, Dadras, Siamak, Summy, Gil S., Liu, Yingmei, Wimberger, Sandro
Publikováno v:
Phys. Rev. A 106, 033307 (2022)
Over the last decade there have been many advances in studies of quantum walks (QWs) including a momentum-space QW recently realized in our spinor Bose-Einstein condensate system. This QW possessed behaviors that generally agreed with theoretical pre
Externí odkaz:
http://arxiv.org/abs/2205.07732
We study trajectories of collective spin states of an ensemble of spinors. The spinors considered here are either trapped ions in free space or atoms confined in a cavity, both systems of which are engineered through their interactions with light fie
Externí odkaz:
http://arxiv.org/abs/2108.07415
Publikováno v:
Phys. Rev. Lett. 127, 033602 (2021)
We propose a single-atom, cavity quantum electrodynamics system, compatible with recently demonstrated, fiber-integrated micro- and nano-cavity setups, for the on-demand production of optical number-state, $0N$-state, and binomial-code-state pulses.
Externí odkaz:
http://arxiv.org/abs/2012.00246
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 53, 065301 (2020)
The atom-optics kicked rotor can be used to prepare specific momentum distributions on a discrete basis set. We implement a continuous-time quantum walk and a quantum search protocol in this momentum basis. In particular we propose ways to identify a
Externí odkaz:
http://arxiv.org/abs/2002.09139
Autor:
Groiseau, Caspar, Wimberger, Sandro
Publikováno v:
Phys. Rev. A 99, 013610 (2019)
We analytically investigate the recently proposed and implemented discrete-time quantum walk based on a kicked Bose-Einstein condensate. We extend previous work on the effective dynamics by taking into account spontaneous emission due to the kicking
Externí odkaz:
http://arxiv.org/abs/1811.01632
Publikováno v:
Phys. Rev. A 99, 043617 (2019)
We report on a discrete-time quantum walk that uses the momentum of ultra-cold rubidium-87 atoms as the walk space and two internal atomic states as the coin degree of freedom. Each step of the walk consists of a coin toss (a microwave pulse) followe
Externí odkaz:
http://arxiv.org/abs/1809.09282
Publikováno v:
Phys. Rev. Lett. 121, 070402 (2018)
We present a discrete-time, one-dimensional quantum walk based on the entanglement between the momentum of ultracold rubidium atoms (the walk space) and two internal atomic states (the "coin" degree of freedom). Our scheme is highly flexible and can
Externí odkaz:
http://arxiv.org/abs/1802.08160