Zobrazeno 1 - 10
of 552
pro vyhledávání: '"CHOU, C. W."'
Autor:
Clements, E. R., Kim, M. E., Cui, K., Hankin, A. M., Brewer, S. M., Valencia, J., Chen, J. -S., Chou, C. W., Leibrandt, D. R., Hume, D. B.
Publikováno v:
Phys. Rev. Lett. 125, 243602 (2020)
Laser decoherence limits the stability of optical clocks by broadening the observable resonance linewidths and adding noise during the dead time between clock probes. Correlation spectroscopy avoids these limitations by measuring correlated atomic tr
Externí odkaz:
http://arxiv.org/abs/2007.02193
Autor:
Brewer, S. M., Chen, J. -S., Beloy, K., Hankin, A. M., Clements, E. R., Chou, C. W., McGrew, W. F., Zhang, X., Fasano, R. J., Nicolodi, D., Leopardi, H., Fortier, T. M., Diddams, S. A., Ludlow, A. D., Wineland, D. J., Leibrandt, D. R., Hume, D. B.
Publikováno v:
Phys. Rev. A 100, 013409 (2019)
We have measured the quadratic Zeeman coefficient for the ${^{1}S_{0} \leftrightarrow {^{3}P_{0}}}$ optical clock transition in $^{27}$Al$^{+}$, $C_{2}=-71.944(24)$~MHz/T$^{2}$, and the unperturbed hyperfine splitting of the $^{25}$Mg$^{+}$ $^{2}S_{1
Externí odkaz:
http://arxiv.org/abs/1903.04661
Autor:
Hankin, A. M., Clements, E. R., Huang, Y., Brewer, S. M., Chen, J. -S., Chou, C. W., Hume, D. B., Leibrandt, D. R.
Publikováno v:
Phys. Rev. A 100, 033419 (2019)
We describe a framework for calculating the frequency shift and uncertainty of trapped-ion optical atomic clocks caused by background-gas collisions, and apply this framework to an $^{27}$Al$^+$ clock to enable a total fractional systematic uncertain
Externí odkaz:
http://arxiv.org/abs/1902.08701
Autor:
Brewer, S. M., Chen, J. -S., Hankin, A. M., Clements, E. R., Chou, C. W., Wineland, D. J., Hume, D. B., Leibrandt, D. R.
Publikováno v:
Phys. Rev. Lett. 123, 033201 (2019)
We describe an optical atomic clock based on quantum-logic spectroscopy of the $^1$S$_0$ $\leftrightarrow$ $^3$P$_0$ transition in $^{27}$Al$^{+}$ with a systematic uncertainty of ${9.4 \times 10^{-19}}$ and a frequency stability of ${1.2\times10^{-1
Externí odkaz:
http://arxiv.org/abs/1902.07694
Publikováno v:
Phys. Rev. Lett. 118, 053002 (2017)
We report on Raman sideband cooling of ${^{25}\text{Mg}^+}$ to sympathetically cool the secular modes of motion in a $^{25}\text{Mg}^+$-$^{27}\!\text{Al}^+$ two-ion pair to near the three-dimensional (3D) ground state. The evolution of the Fock-state
Externí odkaz:
http://arxiv.org/abs/1608.05047
In this work we perform theoretical analysis about a coupled RC circuit with constant driven currents. Starting from stochastic differential equations, where voltages are subject to thermal noises, we derive time-correlation functions, steady-state d
Externí odkaz:
http://arxiv.org/abs/1601.04776
Autor:
Hankin, A. M., Jau, Y. -Y., Parazzoli, L. P., Chou, C. W., Armstrong, D. J., Landahl, A. J., Biedermann, G. W.
Publikováno v:
Phys. Rev. A 89, 033416 (2014)
We explore a single-photon approach to Rydberg state excitation and Rydberg blockade. Using detailed theoretical models, we show the feasibility of direct excitation, predict the effect of background electric fields, and calculate the required intera
Externí odkaz:
http://arxiv.org/abs/1401.2191
Autor:
Fortier, T. M., Nelson, C. W., Hati, A., Quinlan, F., Taylor, J., Jiang, H., Chou, C. W., Rosenband, T., Lemke, N., Ludlow, A., Howe, D., Oates, C. W., Diddams, S. A.
Publikováno v:
Applied Physics Letters 100, 231111 (2012)
We present an optical-electronic approach to generating microwave signals with high spectral purity. By circumventing shot noise and operating near fundamental thermal limits, we demonstrate 10 GHz signals with an absolute timing jitter for a single
Externí odkaz:
http://arxiv.org/abs/1205.1164
Publikováno v:
Phys. Rev. Lett. 107, 243902 (2011)
We demonstrate a general method for state detection of trapped ions that can be applied to a large class of atomic and molecular species. We couple a "spectroscopy" ion (Al+) to a "control" ion (Mg+) in the same trap and perform state detection throu
Externí odkaz:
http://arxiv.org/abs/1108.5922
We place two atoms in quantum superposition states and observe coherent phase evolution for 3.4x10^15 cycles. Correlation signals from the two atoms yield information about their relative phase even after the probe radiation has decohered. This techn
Externí odkaz:
http://arxiv.org/abs/1101.3766