Zobrazeno 1 - 10
of 580
pro vyhledávání: '"Schwab, K A"'
Autor:
DeLorenzo, L. A., Schwab, K. C.
We report the measurement of the acoustic quality factor of a gram-scale, kilo-hertz frequency superfluid resonator, detected through the parametric coupling to a superconducting niobium microwave cavity. For temperature between 400mK and 50mK, we ob
Externí odkaz:
http://arxiv.org/abs/1607.07902
Direct detection of gravitational waves is opening a new window onto our universe. Here, we study the sensitivity to continuous-wave strain fields of a kg-scale optomechanical system formed by the acoustic motion of superfluid helium-4 parametrically
Externí odkaz:
http://arxiv.org/abs/1606.04980
Autor:
Lei, C. U., Weinstein, A. J., Suh, J., Wollman, E. E., Kronwald, A., Marquardt, F., Clerk, A. A., Schwab, K. C.
Publikováno v:
Phys. Rev. Lett. 117, 100801 (2016)
We use a reservoir engineering technique based on two-tone driving to generate and stabilize a quantum squeezed state of a micron-scale mechanical oscillator in a microwave optomechanical system. Using an independent backaction evading measurement to
Externí odkaz:
http://arxiv.org/abs/1605.08148
Autor:
Wollman, E. E., Lei, C. U., Weinstein, A. J., Suh, J., Kronwald, A., Marquardt, F., Clerk, A. A., Schwab, K. C.
Publikováno v:
Science 349, 952 (2015)
As a result of the quantum, wave-like nature of the physical world, a harmonic oscillator can never be completely at rest. Even in the quantum ground state, its position will always have fluctuations, called the zero-point motion. Although the zero-p
Externí odkaz:
http://arxiv.org/abs/1507.01662
Publikováno v:
Phys. Rev. A 92, 042104 (2015)
An atom attached to a micrometer-scale wire that is vibrating at a frequency of 100 MHz and with displacement amplitude 1 nm experiences an acceleration magnitude 10^9 ms^-2, approaching the surface gravity of a neutron star. As one application of su
Externí odkaz:
http://arxiv.org/abs/1409.2137
Observation and interpretation of motional sideband asymmetry in a quantum electro-mechanical device
Autor:
Weinstein, A. J., Lei, C. U., Wollman, E. E., Suh, J., Metelmann, A., Clerk, A. A., Schwab, K. C.
Publikováno v:
Phys. Rev. X 4, 041003 (2014)
Quantum electro-mechanical systems offer a unique opportunity to probe quantum noise properties in macroscopic devices, properties which ultimately stem from the Heisenberg Uncertainty Principle. A simple example of this is expected to occur in a mic
Externí odkaz:
http://arxiv.org/abs/1404.3242
Autor:
Suh, J., Weinstein, A. J., Lei, C. U., Wollman, E. E., Steinke, S. K., Meystre, P., Clerk, A. A., Schwab, K. C.
During the theoretical investigation of the ultimate sensitivity of gravitational wave detectors through the 1970's and '80's, it was debated whether quantum fluctuations of the light field used for detection, also known as photon shot noise, would u
Externí odkaz:
http://arxiv.org/abs/1312.4084
Autor:
Fong, K. C., Wollman, Emma, Ravi, Harish, Chen, Wei, Clerk, Aash, Shaw, M. D., LeDuc, H. G., Schwab, K. C.
The ability to transport energy is a fundamental property of the two-dimensional Dirac fermions in graphene. Electronic thermal transport in this system is relatively unexplored and is expected to show unique fundamental properties and to play an imp
Externí odkaz:
http://arxiv.org/abs/1308.2265
Autor:
DeLorenzo, L. A., Schwab, K. C.
We investigate the low loss acoustic motion of superfluid $^4$He parametrically coupled to a very low loss, superconducting Nb, TE$_{011}$ microwave resonator, forming a gram-scale, sideband resolved, optomechanical system. We demonstrate the detecti
Externí odkaz:
http://arxiv.org/abs/1308.2164
We review a scheme for performing a back-action evading measurement of one mechanical quadrature in an optomechanical setup. The experimental application of this scheme has been limited by parametric instabilities caused in general by a slight depend
Externí odkaz:
http://arxiv.org/abs/1304.6779