Ruvi
@ruvi-lecamwasam.bsky.social
I'm a scientist interested in quantum sensing, particularly with levitated optomechanics. Currently a postdoc in Singapore, previously in 沖縄 and Australia. I write about things I find interesting at ruvi.blog
Pinned
Ruvi
@ruvi-lecamwasam.bsky.social
· Nov 23
Happy that this paper has finally been published! We show that Lie algebras, by leveraging the natural structure of quantum mechanics, can provide linear parameterisations for nonlinear problems. This can help us understand quantum dynamics and metrology.
journals.aps.org/prresearch/a...
journals.aps.org/prresearch/a...
Reposted by Ruvi
I wrote a blog post on how a piece of pure mathematics - the development of the landscape function in PDE - played a part in realizing noticeable savings in household energy bills due to improved LED lighting technology: terrytao.wordpress.com/2025/02/23/c...
Closing the “green gap”: from the mathematics of the landscape function to lower electricity costs for households
I recently returned from the 2025 Annual Meeting of the “Localization of Waves” collaboration (supported by the Simons Foundation, with additional related support from the NSF), where I…
terrytao.wordpress.com
February 24, 2025 at 6:51 PM
I wrote a blog post on how a piece of pure mathematics - the development of the landscape function in PDE - played a part in realizing noticeable savings in household energy bills due to improved LED lighting technology: terrytao.wordpress.com/2025/02/23/c...
Another slide from my upcoming talk.
December 2, 2024 at 3:41 PM
Another slide from my upcoming talk.
Reposted by Ruvi
Technical 🧵on ghosts (states with negative norm)
States with a negative norm are unphysical in quantum field theories.
If you have a kinetic term with a negative sign it gives rise to the following commutation relation
1/9
States with a negative norm are unphysical in quantum field theories.
If you have a kinetic term with a negative sign it gives rise to the following commutation relation
1/9
November 23, 2024 at 11:35 AM
Technical 🧵on ghosts (states with negative norm)
States with a negative norm are unphysical in quantum field theories.
If you have a kinetic term with a negative sign it gives rise to the following commutation relation
1/9
States with a negative norm are unphysical in quantum field theories.
If you have a kinetic term with a negative sign it gives rise to the following commutation relation
1/9
Happy that this paper has finally been published! We show that Lie algebras, by leveraging the natural structure of quantum mechanics, can provide linear parameterisations for nonlinear problems. This can help us understand quantum dynamics and metrology.
journals.aps.org/prresearch/a...
journals.aps.org/prresearch/a...
November 23, 2024 at 2:11 PM
Happy that this paper has finally been published! We show that Lie algebras, by leveraging the natural structure of quantum mechanics, can provide linear parameterisations for nonlinear problems. This can help us understand quantum dynamics and metrology.
journals.aps.org/prresearch/a...
journals.aps.org/prresearch/a...
Reposted by Ruvi
When did we start using the term 'logical qubit'?
I just went through a few old papers to see if I could find the first use.
In 1995, Peter Shor had k qubits he wanted to store and nine that contain the encoding. But the word 'logical' does not appear.
journals.aps.org/pra/abstract...
I just went through a few old papers to see if I could find the first use.
In 1995, Peter Shor had k qubits he wanted to store and nine that contain the encoding. But the word 'logical' does not appear.
journals.aps.org/pra/abstract...
November 22, 2024 at 9:11 AM
When did we start using the term 'logical qubit'?
I just went through a few old papers to see if I could find the first use.
In 1995, Peter Shor had k qubits he wanted to store and nine that contain the encoding. But the word 'logical' does not appear.
journals.aps.org/pra/abstract...
I just went through a few old papers to see if I could find the first use.
In 1995, Peter Shor had k qubits he wanted to store and nine that contain the encoding. But the word 'logical' does not appear.
journals.aps.org/pra/abstract...
Reposted by Ruvi
By popular demand, here is a starter pack of all quantum PhD students on BlueSky that we could find.
go.bsky.app/AUTn1di
go.bsky.app/AUTn1di
November 21, 2024 at 6:28 PM
By popular demand, here is a starter pack of all quantum PhD students on BlueSky that we could find.
go.bsky.app/AUTn1di
go.bsky.app/AUTn1di
I've been playing around with blender for an upcoming talk. This shows how Euler angles fail at the pole, as your system loses a degree of freedom.
November 23, 2024 at 3:54 AM
I've been playing around with blender for an upcoming talk. This shows how Euler angles fail at the pole, as your system loses a degree of freedom.