Zobrazeno 1 - 10
of 742
pro vyhledávání: '"Mølmer, K."'
We consider two rubidium atoms, prepared in the same S or P Rydberg states near an optical nanofibre. We determine the van der Waals interaction between them and identify novel features, including the reshaping of the interaction anisotropy and the f
Externí odkaz:
http://arxiv.org/abs/2209.06542
Autor:
Andersen, A. L., Mølmer, K.
We present a protocol for probing the state of a quantum system by its resonant coupling and entanglement with a meter system. By continuous measurement of a time evolving meter observable, we infer the evolution of the entangled systems and, ultimat
Externí odkaz:
http://arxiv.org/abs/2201.03918
Publikováno v:
Phys. Rev. A 106, 063302 (2022)
We examine the adiabatic preparation of spatially-ordered Rydberg excitations of atoms in finite one-dimensional lattices by frequency-chirped laser pulses, as realized in a number of recent experiments simulating quantum Ising model. Our aims are to
Externí odkaz:
http://arxiv.org/abs/2111.14553
Publikováno v:
Modern Physics Letters B (2020)
A challenge of modern physics is to investigate the quantum behavior of a bulk material object, for instance a mechanical oscillator. We have earlier demonstrated that by coupling a mechanical oscillator to the energy levels of embedded rare-earth io
Externí odkaz:
http://arxiv.org/abs/2004.03533
Publikováno v:
Phys. Rev. A 101, 052508 (2020)
In this paper, we report on numerical calculations of the spontaneous emission rates and Lamb shifts of a $^{87}\text{Rb}$ atom in a Rydberg-excited state $\left(n\leq30\right)$ located close to a silica optical nanofiber. We investigate how these qu
Externí odkaz:
http://arxiv.org/abs/2002.01278
Publikováno v:
Phys. Rev. X 10, 041024 (2020)
We introduce a new dynamical picture, referred to as correlation picture,' which connects a correlated state to its uncorrelated counterpart. Using this picture allows us to derive an exact dynamical equation for a general open-system dynamics with s
Externí odkaz:
http://arxiv.org/abs/1903.03861
Autor:
Stourm, E, Zhang, Y, Lepers, M, Guérout, R, Robert, J, Chormaic, S Nic, Mølmer, K., Brion, E.
Publikováno v:
E Stourm et al 2019 J. Phys. B: At. Mol. Opt. Phys. 52 045503
We report on numerical calculations of the spontaneous emission rate of a Rydberg-excited sodium atom in the vicinity of an optical nanofibre. In particular, we study how this rate varies with the distance of the atom to the fibre, the fibre's radius
Externí odkaz:
http://arxiv.org/abs/1810.06887
Autor:
Petrosyan, D., Mølmer, K.
Publikováno v:
Phys. Rev. Lett. 121, 123605 (2018)
We propose an efficient free-space scheme to create single photons in a well-defined spatiotemporal mode. To that end, we first prepare a single source atom in an excited Rydberg state. The source atom interacts with a large ensemble of ground-state
Externí odkaz:
http://arxiv.org/abs/1806.07094
Autor:
Cohen, I., Mølmer, K.
Publikováno v:
Phys. Rev. A 98, 030302 (2018)
We propose a simple interaction protocol to be implemented on a scalable quantum network, in which the quantum nodes consist of qubit systems confined in cavities. The nodes are deterministically coupled by transmission and reflection of a single pho
Externí odkaz:
http://arxiv.org/abs/1802.08124
Publikováno v:
Phys. Rev. A 97, 042111 (2018)
We prove that temporal control of the strengths of springs connecting $N$ harmonic oscillators in a chain provides complete access to all Gaussian states of $N-1$ collective modes. The proof relies on the construction of a suitable basis of cradle mo
Externí odkaz:
http://arxiv.org/abs/1710.03145