I read this story about 10 years ago, though I don't believe it was a new story by the time I read it. This story likely came out in the 80s-90s. The main plot dealt with a mysterious garden behind a house, which contained a hedge maze. Entering and exiting the maze would leave you in a slightly different version of the world, depending on how many different turns you took while in the maze. Going a single turn into the maze and returning could leave you in a location where only minor changes had occurred (e.g. what others had for lunch), but going deeper could lead to drastic changes in the surrounding world. While it likely wasn't explicitly said, there was some indication that this had to do with some quantum effect, and was demonstrating many-worlds. This is not the story mentioned here or here and is not The Garden of Forking Paths, though the theme of bifurcation/many worlds is similar.
Additional story details:
- The story was written in English, and was either a short story or part of an anthology of short stories.
- Only the person moving through the maze recognized the changes between the worlds accessed; those outside the maze simply existed in the new "world".
- The main character did not understand the influence the maze had at first, and only realized after noticing small changes (another person no longer had glasses and was convinced that they never had glasses).
- The main character had some driving reason for continued exploration of the maze, but exploration eventually just lead to an even worse world, ending with the main character lost with no way back to their original world.
- The "quantum/many worlds" aspect of the maze could have been implied, possibly by the former house/garden owner being a quantum physicist, but this was not directly stated.
- One of the characters was partially paralyzed and confined to a wheelchair. They attempted to use the maze to reach a world where they could walk normally.
I vaguely remember another story that may have been in the same anthology, if this was in fact grouped together. The only clear memory of this story is imagery of a snake eating its own tail, which was relevant due to some time travel (that was only accessible at certain locations) occurring in the story.