Journal
PHYSICAL REVIEW A
Volume 94, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.94.053615
Keywords
-
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [JP25800225, JP26287088]
- MEXT of Japan
- ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan)
- Japan Society for the Promotion of Science [JP16J03613]
- [JP15H05855]
- Grants-in-Aid for Scientific Research [25800225, 16J03613, 15H05855, 26287088] Funding Source: KAKEN
Ask authors/readers for more resources
Recent realizations of quantum gas microscopy offer the possibility of continuous monitoring of the dynamics of a quantum many-body system at the single-particle level. By analyzing effective non-Hermitian Hamiltonians for interacting bosons in an optical lattice and continuum, we demonstrate that the backaction of quantum measurement shifts the quantum critical point and gives rise to a unique critical phase beyond the terrain of the standard universality class. We perform mean-field and strong-coupling-expansion analyses and show that non-Hermitian contributions shift the superfluid-Mott-insulator transition point. Using a low-energy effective field theory, we discuss critical behavior of the one-dimensional interacting Bose gas subject to the measurement backaction. We derive an exact ground state of the effective non-Hermitian Hamiltonian and find a unique critical behavior beyond the Tomonaga-Luttinger liquid universality class. We propose experimental implementations of postselections using a quantum gas microscope to simulate the non-Hermitian dynamics and argue that our results can be investigated with current experimental techniques in ultracold atoms.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available