ChangeLog¶

(Please ignore our internal bug tracking links on this page. Information on how to submit bug reports is here).

pending known bugs¶

Released: 2019-?

[feature]
Add offset-arrayed spins.
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References: #188

[bug]
Not all Android devices can draw droplets, especially MALI-based GPUs have problems. Need to collect more info about why.
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References: #441
[bug]
The optimizer tries to optimize during pulse sequence acquisition elements, which is silly. Need a better way to tell it what periods and what controls to optimize.

Also, the cost function doesn’t take time or pulse amplitude into account, which it should/will.
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2.1.0-beta18¶

Released: 2019-10-?

[bug]
Fixed another. speed. problem.
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2.1.0-beta17¶

Released: 2019-03-?

[bug]
Fixed speed problem with very long sequences and very large pulses
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[bug]
Fixed problem where time slider could get out of sequence with actual displayed experimental state.
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References: #471

2.1.0-beta16¶

Released: 2019-03-?

[bug]
Fixed acquisition phase editing for ‘table’ sequences - was interpreting degrees as radians.
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[bug]
Fixed overly-persistent sequence/simulation error message - can now click it away.
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2.1.0-beta15¶

Released: 2019-03-18

[feature]
Added built-in window function (with nice fat FT) to table editor: exp(-t*10)
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[feature]
Added option to disable autoscaling on VectorWidgets (particularly FID and SPECRTUM displays) - right-click the widget to get a menu with an en/dis-able item.

Also added ability to manually scale the widget - hold down control and roll the mouse wheel while pointing at the display.
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[bug]
Fixed several bugs with sequence table’s and acquisitions. Added acquisition operators to the “Current Hamiltonian” display.
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References: #476, #477

2.1.0-beta14¶

Released: 2019-03-13

[bug]
Can now set ‘np’ in the Sequence Explorer for JSON/Table sequences with acquisition.
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[bug]
Again, much faster large-step optimization (gradient) calculation, and all around calculation of time advance.
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2.1.0-beta13¶

Released: 2019-03-10

[bug]
Dont crash when acquisition sweep width (sw) is negative. Fall-back to Pade approximation when \(\|H\|\) is large.
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[bug]
Double speed of acquisition by measuring \(<Im>\) instead of \((<Ix> - i \cdot <Iy>)\)
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2.1.0-beta12¶

Released: 2019-03-07

[bug]
Only show real part of spectrum (for now). Can be modified by adjusting window function.
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2.1.0-beta11¶

Released: 2019-03-05

[bug]
Mouse wheel now changes pulse angle in Table Editor when pointed at the numeric angle display.
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2.1.0-beta10¶

Released: 2019-03-04

[bug]
Added window function to acquisition, set in Table Editor using the ‘Shape’ button, or in Industrial Sequences by declaring, ie define any window = 'cos(t*pi).+1'.
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2.1.0-beta8¶

Released: 2019-02-26

[bug]
Fixed shaped pulse amplitude calculation in Industrial sequence language.
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2.1.0-beta7¶

Released: 2019-02-24

[bug]
FID Acquisition and 1D Spectrum display.
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References: #424
[bug]
Basic Pulse optimization - simple gradient descent.
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References: #429
[bug]
Limit Varian pulses to 100000 lines/points.
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References: #457
[bug]
Fixed a weird issue when editing a sequence in the Sequence Explorer that would cause repeated warnings related to automatic sync’ing with the main simulation.
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References: #422
[bug]
Fix crash when taking log() of certain matrices for which no log() exists.
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References: #430
[bug]
Clean up the graphics of the textual Initial State Menu editor, and make DROPS 3d view sync optional.
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References: #437
[bug]
Keep subsequent delay elements separate rather than combining them into one.
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References: #450
[bug]
Better messages when sequence doesn’t match spin system.
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[bug]
Update browser version to use WASM instead of asm.js for much faster load times.
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[bug]
Added a full-screen presentation mode to the desktop and browser apps, toggled by ctrl-shift-F (capital F!)
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References: #455
[bug]
Remember the last mode an operator window was using.
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References: #452
[bug]
Added preference selection for “DropType” to select droplet renderer - might help with #441.
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References: #441
[bug]
Add SDL2 dependency to generated .rpm, remove Ieval from rpm.
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References: #444
[bug]
Accept expressions tau as τ, and pi as \(\pi\).
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[bug]
Remember operator view mode per-window.
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References: #452
[bug]
Show the currently active initial state operator as highlighted in the menu.
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References: #426

2.0.4¶

Released: 2018-08-20

[bug]
Fix some crashes on obscure bad pulse sequence entry.
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[bug]
Add option ‘–noaudio’ to disable audio on desktop.
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References: #413
[bug]
When the option ‘Show Id Droplet’ was enabled, AND ‘Magnetization Vectors’ was disabled, the I1 droplet would move to the Id droplet position.
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References: #414

2.0.3¶

Released: 2018-06-20

[feature]
Removed which-operator selection from Operator Windows popup menu.
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[bug]
Fix font sizing bug in the Operator Windows.
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References: #396
[bug]
Close the Table Sequence Editor when a non-table sequence is loaded.
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References: #405

2.0.2¶

Released: 2018-06-12

[bug]
Fix what happens when un-checking the ‘Auto apply’ box in Sequence Explorer.
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References: #389
[bug]
Droplet labels went briefly missing in 2.0.1.
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References: #394
[bug]
Fix broken Export Workspace on the MacOS AppStore version due to sandboxing.
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References: #386

2.0.1¶

Released: 2018-06-08

[bug]
Sometimes on iOS or Retina display the font loses symbol characters.
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References: #352
[bug]
Resimulate when control hamiltonians contain changed J or nu params.
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References: #381
[bug]
Fix character glyph rendering bug that caused wrong symbol or no symbol to be displayed.
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References: #348
[bug]
(see 348)
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References: #349
[bug]
(see 348)
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References: #376
[bug]
Sometimes bloch vector objects were displaying uninitialized random values.
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References: #383
[bug]
Only allow the main view to show the density operator.
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References: #327
[bug]
Resize operator view windows always to be square.
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References: #352
[bug]
Show 270° instead of -90° for RX phase display.
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References: #373

2.0.0¶

Released: 2018-04-27

[bug]
A number of bug fixes.
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2.0.0-beta25¶

Released: 2018-04-27

[bug]
Retina display shows wrong % in Zoom menu.
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References: #329
[bug]
Fix bug where J13 and J23 bars were swapped.
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[bug]
Fix some menu entries for web and narrow screens.
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2.0.0-beta24¶

Released: 2018-04-06

[feature]
Added some standard shaped pulses (sinc,gauss,hyperbolic secant).
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References: #332
[feature]
Web version now double-checks with user before closing window.
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[bug]
Fixed menus on narrow screens.
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2.0.0-beta23¶

Released: 2018-04-04

[feature]
Project save/load/import/export feature (File menu).
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References: #321
[feature]
Added text descriptions of pulse sequences.
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References: #322
[feature]
Rename command line option RESET to –reset
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[feature]
Rename Option menu to View
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[feature]
Highlight active options in menus.
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[feature]
Lots of updates to documentation.
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[bug]
Show GUI zoom as percentage.
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References: #300

2.0.0-beta22¶

Released: 2017-12-22

[bug]
Many small bug fixes
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[bug]
Fix SDL on older Android APIs.
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References: #318
[bug]
Fix scaling on macOS retina displays.
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References: #296
[bug]
Fix identity operator, was E, should have been 1/2E.
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References: #293
[bug]
Fix ‘C’ button in operator editor to clear to 0.
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References: #259

2.0.0-beta20¶

Released: 2017-11-30

[feature]
All operators can now be shown in DROPS or matrix form by right- or long- clicking on the display area.
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[feature]
Make the back-button on Android send SpinDrops to the background.
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[bug]
Fixed a problem with resolution on Mac retina displays.
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[bug]
Correct DPI detection of iOS devices.
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[bug]
Examples of how to do propagator calculations for Qbits under the Pulse Sequences > Tutorials menu.
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[bug]
macOS Multi-finger gestures sometimes behave strangely.
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References: #176

2.0.0-beta19¶

Released: 2017-11-17

[bug]
Android release only, fix minor bug in beta18.
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2.0.0-beta18¶

Released: 2017-11-17

[feature]
Added ‘propagator’ channel type to ppg, and some basic examples of qbit gates under Pulse Sequence > Tutorials. And a Q. Computing basis set in the List Prod Ops window.
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References: #257
[feature]
Added Effective Hamiltonian view window, shortcut: ‘E’.
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[feature]
The advanced sequence editor is unusable on small screens. Dont show the option when the screen is too narrow.
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References: #168
[feature]
Added quantum-computing style bra-ket notation, ie <001| <1|0> <0||0> |1><0|
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[feature]
easier to remember keyboard shortcuts, D:ensity Operator window, H:amiltonian window, U:Propagator window
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[bug]
Crash in recognizing cerain ppg loops fixed.
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[bug]
Sometimes the first frame drawn after start and after resize isnt correct.
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References: #174
[bug]
Fixed Android multi-finger gestures: rotation, zoom.
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[bug]
Clarified new sequence creation when cloning a sequence.
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[bug]
Android devices / versions dont all recognize double-click to reset the view. One needed to click exactly on the same pixel twice, hopefully fixed now.
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References: #172
[bug]
fixed: macOS multi-finger gestures with 16 frames (phase cycling) is extremely slow.
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References: #202
[bug]
Fixed typo in Preferences grouping, user may need to ‘reset’ preferences to clean up the preferences editor display.
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2.0.0-beta17¶

Released: 2017-10-18

[feature]
Change Propagator window to show cumulative propagator from beginning of experiment.
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[feature]
Group Preferences into categories.
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2.0.0-beta16¶

Released: 2017-10-17

[feature]
Added a propagator window in Options menu.
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[bug]
Fixed crash in sequence table editor.
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[bug]
Fixed window size/position saving for some windows.
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[bug]
Save the current state on iOS when going into the background.
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[bug]
Select either Heteronuclear or Homonuclear system.
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2.0.0-beta15¶

Released: 2017-10-10

[feature]
Save window locations and sizes.
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[bug]
Loading invalid sequences caused infinite loop
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[bug]
Changing spin count with an invalid initial state for the new count caused crash.
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2.0.0-beta14¶

Released: 2017-10-05

[bug]
Fixed problem with Android release build.
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References: #242
[bug]
Display receiver phase when in multi-frame mode.
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[bug]
Fixed problem with heteronuclear channel assignment.
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2.0.0-beta13¶

Released: 2017-10-05

[bug]
Spins were erroneously assigned to rf channel 0, causing erroneous hamiltonians.
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[bug]
Coupling bars weren’t updating when changing J values.
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[bug]
Changing Layout between Chain and Triangle didn’t take effect immediately.
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2.0.0-beta12¶

Released: 2017-09-21

[feature]
Adding ?RESET to the SpinDrops-web URL resets the Preferences
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[feature]
Show circle with frame phase in Phase Cycling mode.
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References: #187
[feature]
added keyboard shortcuts [ ] for jumping to begin/end of sequence
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References: #231
[feature]
keyboard shortcut ‘r’ toggles the repeat mode
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References: #231
[feature]
keyboard shortcut ‘b’ changes to a random sequence (for debugging)
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References: #231
[feature]
show error message when creating a Preference Scheme fails
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[feature]
Menus are drawn white on web version, and only visible when moused-over.
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[bug]
macOS bundle versions and IDs should be set correctly
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[bug]
Resetting preferences failed to change foreground/background colors
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References: #218
[bug]
help menus should now correctly link to the online documentation
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[bug]
can no longer create Preference Scheme with blank name “”
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[support]
documentation updates, mostly operator notation
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References: #231

2.0.0-beta11¶

Released: 2017-09-21

[feature]
equal-sized DROPS layout for multi-frame (ie phase-cycling) experiments
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[feature]
Added option Apply RX Phase to draw DROPS with receiver phase applied
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[feature]
Added dropdown menus to Operator and List Prod Ops windows
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References: #200

2.0.0-beta9¶

Released: 2017-09-12

[feature]
Save the Spin System parameters between across sessions.
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References: #191
[feature]
Option Strong J-Coupling to enable Strong Coupling terms in Hamiltonian
¶
References: #195

[bug]
Android sound beep had wrong sampling rate, fixed.
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[bug]
Crash when Hamiltonian has invalid custom string-based terms.
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References: #154

[support]
Move documentation to website https://spindrops.org/
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1.0.0¶

Released: 2015-05-28