Jump To Date
View By Semester
View By Series
Add An Event

Center for Astrophysics Research and Technologies Seminar Series Information


Events Calendar

Quantum Measurement and Gravitational-Wave Detection

Friday March 3, 2017
4:00 pm

 Presenter:  Professor Yanbei Chen, Department of Physics, California Institute of Technology
 Series:  Physics and Astronomy Colloquium
 Abstract:  After the initial detection of gravitational waves, further improvements of detector sensitivity will be crucial for future progress in gravitational-wave astronomy. At this moment, using laser interferometry, LIGO detectors are able to sense gravitational-wave-induced displacements of 40-kg test masses at the level of 10^-18 meters, within a time scale of ~ 10 milliseconds. This is close to the so-called Standard Quantum Limit, which arises from the trade-off between displacement sensitivity and measurement-induced back action onto momentum --- as dictated by the Heisenberg Uncertainty Principle, when applied to LIGO's macroscopic test masses. This also means these macroscopic objects are starting to behave quantum mechanically. In next-generation detectors, the SQL can be circumvented over a broad frequency band by injecting frequency-dependent squeezed vacuum. More advanced techniques are being conceived to improve detector sensitivity more dramatically.
 Location:  Room 125, Dane Smith Hall

Refreshments will be available before the colloquium, at 03:45 pm, in in the lobby of Dane Smith Hall.

Disability Notice Individuals with disabilities who need an auxiliary aid or service to attend or participate in P&A events should contact Sandra Ortiz (phone: 505-277-5900, email: sportiz@unm.edu) well in advance to ensure your needs are accommodated. Event handouts can be provided in alternative accessible formats upon request. Please contact Ms. Ortiz if you need written information in an alternative format.