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Welcome to the
QuTiP
users Group. To join, just post a message!
Note this group is for help in installing or using the toolkit, or general idea for the project.
For issues and ideas about, and contributions to, the QuTiP code go to the
QuTiP GitHub
If you need help using QuTiP please look through the old posts before submitting a new one.
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Raphael Kaubrügger
Apr 26
PIQS: Discrepancy between lindblad_dissipator and lindbladian
Hello all, I maybe have a very basic question, but the puzzle that I have is that if I use the system
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PIQS: Discrepancy between lindblad_dissipator and lindbladian
Hello all, I maybe have a very basic question, but the puzzle that I have is that if I use the system
Apr 26
Aravindh Shankar
,
Éric Giguère
4
Apr 25
Quicker way to code multiple TLS
tensor can also take a list of qobj: H_coup = 0 for i in range(1, N): H_coup += tensor([sigmax()] + [
unread,
Quicker way to code multiple TLS
tensor can also take a list of qobj: H_coup = 0 for i in range(1, N): H_coup += tensor([sigmax()] + [
Apr 25
KINGSHUK ADHIKARY
,
Éric Giguère
2
Apr 25
Kernel Dead
Hi Kingshuk Adhikary, This is usually errors in compiled code, mostly segfault. There are know cases
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Kernel Dead
Hi Kingshuk Adhikary, This is usually errors in compiled code, mostly segfault. There are know cases
Apr 25
Khamul
,
Éric Giguère
5
Apr 24
krylovsolve() error with same input as sesolve(), mesolve()
This indeed worked. For my purposes, I needed to set min_step to 1e-9. Thank you for the speedy
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krylovsolve() error with same input as sesolve(), mesolve()
This indeed worked. For my purposes, I needed to set min_step to 1e-9. Thank you for the speedy
Apr 24
Manish J. Thapa
,
Éric Giguère
5
Apr 19
Cubic_Spline replaced by Spline
I made a quick patch (https://github.com/qutip/qutip/pull/2397). It should work in the next release.
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Cubic_Spline replaced by Spline
I made a quick patch (https://github.com/qutip/qutip/pull/2397). It should work in the next release.
Apr 19
saaru darshini
Apr 17
ladder operator for quantum harmonic oscillator
How do I represent ak ∣n1 n2 n3 ,,,,nn⟩ = √nk-1 ∣n1 n2 n3 ,,,,nn⟩ and ak dagger ∣n1 n2 n3 ,,,,nn⟩= √
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ladder operator for quantum harmonic oscillator
How do I represent ak ∣n1 n2 n3 ,,,,nn⟩ = √nk-1 ∣n1 n2 n3 ,,,,nn⟩ and ak dagger ∣n1 n2 n3 ,,,,nn⟩= √
Apr 17
saaru darshini
,
Éric Giguère
7
Apr 8
type error when my essolve function runs
Thankyou Eric, this was very helpful. On Tuesday, April 9, 2024 at 12:49:58 AM UTC+5:30 eric.g...@
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type error when my essolve function runs
Thankyou Eric, this was very helpful. On Tuesday, April 9, 2024 at 12:49:58 AM UTC+5:30 eric.g...@
Apr 8
Paul Menczel
Apr 3
Re: State evolution NOT starting at time t=0
Hi Khamul, The tlist that you pass to the solvers defines the time interval for the evolution. That
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Re: State evolution NOT starting at time t=0
Hi Khamul, The tlist that you pass to the solvers defines the time interval for the evolution. That
Apr 3
KINGSHUK ADHIKARY
,
Alex Pitchford
4
Apr 1
Logarithmic negativity (LN)
Hello Alex, Thanks for your attention. I have already calculated the partial trace to separate any
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Logarithmic negativity (LN)
Hello Alex, Thanks for your attention. I have already calculated the partial trace to separate any
Apr 1
Simon Cross
Mar 28
QuTiP 5.0.0
Greetings, QuTiP 5.0.0 has been released! QuTiP 5 is a redesign of many of the core components of
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QuTiP 5.0.0
Greetings, QuTiP 5.0.0 has been released! QuTiP 5 is a redesign of many of the core components of
Mar 28
Simon Cross
Mar 27
QuTiP 5 release tomorrow
Hello QuTiPers, On behalf of the QuTiP admin team I'm excited to announce that we will release
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QuTiP 5 release tomorrow
Hello QuTiPers, On behalf of the QuTiP admin team I'm excited to announce that we will release
Mar 27
Or Golan
,
Paul Menczel
4
Mar 27
Deviation between analytical and numerical solutions
You were right - a higher cutoff fixed the problem. Thanks! On 27 Mar 2024, at 10:14, Or Golan <or
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Deviation between analytical and numerical solutions
You were right - a higher cutoff fixed the problem. Thanks! On 27 Mar 2024, at 10:14, Or Golan <or
Mar 27
Spiros Ts
Mar 23
Proposal for GSoC 24
Author: Spyridon Tsioupros Github account: https://github.com/Spiros7bit I wrote the proposal but
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Proposal for GSoC 24
Author: Spyridon Tsioupros Github account: https://github.com/Spiros7bit I wrote the proposal but
Mar 23
Johnny Lin
Mar 18
fidelity traced over a sub system
I am looking at optimisation for a state to state transfer of a subsystem of a Hamiltonian, with
unread,
fidelity traced over a sub system
I am looking at optimisation for a state to state transfer of a subsystem of a Hamiltonian, with
Mar 18
Vikas Chaudhary
Mar 16
Facing Problems In Test Case
Unable to run the test cases in (entropy.py) it show this error
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Facing Problems In Test Case
Unable to run the test cases in (entropy.py) it show this error
Mar 16
rochisha.a...@gmail.com
,
Simon Cross
2
Mar 12
Unknown behavior
`qutip.qeye(...)` is not a valid density matrix -- it is not normalized and has a trace of 2 instead
unread,
Unknown behavior
`qutip.qeye(...)` is not a valid density matrix -- it is not normalized and has a trace of 2 instead
Mar 12
Johnny Lin
,
Patrick Hopf
2
Feb 20
setting initial pulse for optimal control with CRAB
Hi there, Just in case you have not already looked at the example notebooks: Jupyter Notebook Viewer
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setting initial pulse for optimal control with CRAB
Hi there, Just in case you have not already looked at the example notebooks: Jupyter Notebook Viewer
Feb 20
johny maartin
, …
Johnny Lin
18
Feb 19
using specific guess pulse for grape/crab
I think setting initial pulse for GRAPE is different from setting initial pulse for CRAB, since for
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using specific guess pulse for grape/crab
I think setting initial pulse for GRAPE is different from setting initial pulse for CRAB, since for
Feb 19
Simon Cross
,
Alex Pitchford
2
Feb 13
qutip-qtrl 0.1.1
Hi folks, Excellent news. Thanks all for sorting this out. I am assuming this will be helpful to
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qutip-qtrl 0.1.1
Hi folks, Excellent news. Thanks all for sorting this out. I am assuming this will be helpful to
Feb 13
Tobias Nadolny
Feb 7
PIQS: Purity and Entropy for multiple spin ensembles
Hi, has someone worked out how to obtain the purity and entropy for systems consisting of multiple
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PIQS: Purity and Entropy for multiple spin ensembles
Hi, has someone worked out how to obtain the purity and entropy for systems consisting of multiple
Feb 7
hajar
Jan 31
question on partial trace over two qubits in a N qubits system
Hello everyone, I need some help in calculating the partial trace over two qubits, normaly i should
unread,
question on partial trace over two qubits in a N qubits system
Hello everyone, I need some help in calculating the partial trace over two qubits, normaly i should
Jan 31
rochisha.a...@gmail.com
,
Simon Cross
2
Jan 24
Raised PR in Qutip tutorials
Thanks Rochisha. Let's discuss in the pull request itself.
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Raised PR in Qutip tutorials
Thanks Rochisha. Let's discuss in the pull request itself.
Jan 24
alex borisov
, …
Éric Giguère
6
Jan 23
Normalize the density matrix in the Lindblad equation
Hi Alex, V5 feedback was added recently and is only available on the master branch. For v4, here is
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Normalize the density matrix in the Lindblad equation
Hi Alex, V5 feedback was added recently and is only available on the master branch. For v4, here is
Jan 23
alex borisov
Jan 21
Division by 0 in the superoperator representation
I am solving a problem where one of the summands of my Lindblad equation is as follows: When I build
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Division by 0 in the superoperator representation
I am solving a problem where one of the summands of my Lindblad equation is as follows: When I build
Jan 21
Marcel Novaes
,
Simon Cross
2
Jan 10
Simple question about tensor product structure
Hi Marcel, Welcome to QuTiP. :) > O = tensor(A,B,C) > right? Correct. To change the ordering of
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Simple question about tensor product structure
Hi Marcel, Welcome to QuTiP. :) > O = tensor(A,B,C) > right? Correct. To change the ordering of
Jan 10
latifeh iri
,
KINGSHUK ADHIKARY
4
Jan 3
Extracting Coefficient Parameters for Time-Dependent States in Qutip
Dear Kingshuk, I have a question regarding the discussion we had about obtaining time-dependent
unread,
Extracting Coefficient Parameters for Time-Dependent States in Qutip
Dear Kingshuk, I have a question regarding the discussion we had about obtaining time-dependent
Jan 3
Jung Nguyen
2
Jan 1
Dynamic solvers for dissipative chain
Any feedback is very much welcome! On Monday, January 1, 2024 at 11:56:11 PM UTC+1 Jung Nguyen wrote:
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Dynamic solvers for dissipative chain
Any feedback is very much welcome! On Monday, January 1, 2024 at 11:56:11 PM UTC+1 Jung Nguyen wrote:
Jan 1
Fenrir Belov
,
Neill Lambert
3
12/24/23
Custom Lindbladian
is it possible to create something like this with this? четверг, 21 декабря 2023 г. в 08:03:17 UTC+3,
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Custom Lindbladian
is it possible to create something like this with this? четверг, 21 декабря 2023 г. в 08:03:17 UTC+3,
12/24/23
Eleonora Panini
12/16/23
Quantum GAN
Did someone develop a quantum adversarial network for images generation?
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Quantum GAN
Did someone develop a quantum adversarial network for images generation?
12/16/23
poliroika
12/12/23
solving the "unusual" master Lindblad equation from MIPT(measurement of the induced phase transition)
I have the derived lindblad equation, but with some changes. I have not found any functions/examples
unread,
solving the "unusual" master Lindblad equation from MIPT(measurement of the induced phase transition)
I have the derived lindblad equation, but with some changes. I have not found any functions/examples
12/12/23