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@arXiv_quantph_bot@mastoxiv.page
2025-05-30 10:33:38

This arxiv.org/abs/2504.06940 has been replaced.
initial toot: mastoxiv.page/@arXiv_qu…

More-efficient Quantum Multivariate Mean Value Estimator from Generalized Grover Operator
In this work, we present an efficient algorithm for multivariate mean value estimation. Our algorithm outperforms previous work by polylog factors and nearly saturates the known lower bound. More formally, given a random vector $\vec{X}$ of dimension $d$, we find an algorithm that uses $O\left(n \log \frac{d}δ\right)$ samples to find a mean estimate that $\vec{\tildeμ}$ that differs from the true mean $\vecμ$ by $\frac{\sqrt{\text{tr } Σ}}{n}$ in $\ell^\infty$ norm and hence $\frac{\sqrt{d …

@leftsidestory@mstdn.social
2025-05-10 01:24:18

Things that don’t Develop II🧪
不显影的那些东西 II🧪
📷 Pentax MX
🎞️Lucky SHD 400
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Lucky SHD 400 **English alt text:** The image shows an empty room with a tiled floor and a ceiling with rectangular panels. There are several windows along one wall, allowing natural light to enter the room. On the floor, there are two fire extinguishers and a black trash bin. The room appears to be clean and well-lit. **Chinese alt text:** 这张图片展示了一个空房间，地板铺有瓷砖，天花板有矩形面板。沿着一面墙有几个窗户，让自然光进入房间。地板上有两个灭火器和一个黑色垃圾桶。房间看起来干净明亮。
Lucky SHD 400 **English alt text:** A black and white photograph with a double exposure effect, featuring a winged statue holding an object, possibly a hammer or torch, against a cloudy sky. The overlay of clouds and trees creates a surreal and ethereal atmosphere. **Chinese alt text:** 一张黑白照片，采用双重曝光效果，展示了一座翼状雕像，手持类似锤子或火炬的物品，背景是多云的天空。云层和树木的叠加效果营造出超现实和梦幻的氛围。

Yiding Cao Geld mit PayPal.Me senden
Folgen Sie dem Link PayPal.Me/dingsterdingster und geben Sie den Betrag ein. Es ist bequem und sicher. Sie haben noch kein PayPal-Konto? Kein Problem.

@leftsidestory@mstdn.social
2025-05-10 01:24:18

Things that don’t Develop II🧪
不显影的那些东西 II🧪
📷 Pentax MX
🎞️Lucky SHD 400
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Lucky SHD 400 **English alt text:** The image shows an empty room with a tiled floor and a ceiling with rectangular panels. There are several windows along one wall, allowing natural light to enter the room. On the floor, there are two fire extinguishers and a black trash bin. The room appears to be clean and well-lit. **Chinese alt text:** 这张图片展示了一个空房间，地板铺有瓷砖，天花板有矩形面板。沿着一面墙有几个窗户，让自然光进入房间。地板上有两个灭火器和一个黑色垃圾桶。房间看起来干净明亮。
Lucky SHD 400 **English alt text:** A black and white photograph with a double exposure effect, featuring a winged statue holding an object, possibly a hammer or torch, against a cloudy sky. The overlay of clouds and trees creates a surreal and ethereal atmosphere. **Chinese alt text:** 一张黑白照片，采用双重曝光效果，展示了一座翼状雕像，手持类似锤子或火炬的物品，背景是多云的天空。云层和树木的叠加效果营造出超现实和梦幻的氛围。

Yiding Cao Geld mit PayPal.Me senden
Folgen Sie dem Link PayPal.Me/dingsterdingster und geben Sie den Betrag ein. Es ist bequem und sicher. Sie haben noch kein PayPal-Konto? Kein Problem.