论文标题
从中子星碰撞中调整高级ligo到kilohertz信号
Tuning Advanced LIGO to kilohertz signals from neutron-star collisions
论文作者
论文摘要
在中子恒星碰撞之后，在kilohertz频率下产生的引力波可以揭示在实验室实验无法获得的极端温度和密度下物质的行为。重力波干涉仪受这些频率下的量子噪声的限制，但可以通过其光学构型调节，以最大程度地提高合并后信号检测的可能性。我们比较了两种这样的调谐策略，将高级ligo变成以合并后的仪器的形式：首先，宽带调谐可以增强乐器的信噪比40--80- \％在\ si {1} {1} {\ khz}相对于基线相对于基线的高度较低的敏感性较低的较低敏感性;其次，一种“失调”的配置，比宽带调整提供了更大的增强功能，但仅在狭窄的频带上，而在其他地方则以较差的量子噪声性能为代价。通过对合并后参数的仪器损失和不确定性的乐观核算，与宽带仪器相比，该仪器的仪器具有$ {\ sillesim} 40 \％$敏感性的提高。
Gravitational waves produced at kilohertz frequencies in the aftermath of a neutron star collision can shed light on the behavior of matter at extreme temperatures and densities that are inaccessible to laboratory experiments. Gravitational-wave interferometers are limited by quantum noise at these frequencies but can be tuned via their optical configuration to maximize the probability of post-merger signal detection. We compare two such tuning strategies to turn Advanced LIGO into a post-merger-focused instrument: first, a wideband tuning that enhances the instrument's signal-to-noise ratio 40--80\% broadly above \SI{1}{\kHz} relative to the baseline, with a modest sensitivity penalty at lower frequencies; second, a "detuned" configuration that provides even more enhancement than the wideband tuning, but over only a narrow frequency band and at the expense of substantially worse quantum noise performance elsewhere. With an optimistic accounting for instrument loss and uncertainty in post-merger parameters, the detuned instrument has a ${\lesssim}40\%$ sensitivity improvement compared to the wideband instrument.
