Papers
Controlled symmetry breaking of the Fermi surface in ultracold polar molecules
Shrestha Biswas, Sebastian Eppelt, Weikun Tian +6 more·Feb 25, 2026
Long-range anisotropic dipole-dipole interactions between ultracold polar molecules are predicted to drive exotic quantum phases, yet direct many-body signatures of these interactions in degenerate Fermi gases have remained elusive. Here, we report t...
Symmetry-protected control of Liouvillian topological phases via Hamiltonian band topology
Shu Long, Hong-Sen Yin, Chao Yang +3 more·Feb 25, 2026
We establish a symmetry-protected correspondence between band topology of coherent Hamiltonians and Liouvillian spectral winding of open quantum systems with quadratic dissipations. This allows the Hamiltonian topology to act as a knob for controllin...
Quantum jumps in open cavity optomechanics and Liouvillian versus Hamiltonian exceptional points
Aritra Ghosh, M. Bhattacharya·Feb 25, 2026
Exceptional points, where two or more eigenstates of a non-Hermitian system coalesce, are now of interest across many fields of physics, from the perspective of open-system dynamics, sensing, nonreciprocal transport, and topological phase transitions...
Quantum criticality in open quantum systems from the purification perspective
Yuchen Guo, Shuo Yang·Feb 25, 2026
Open quantum systems host mixed-state phases that go beyond the symmetry-protected topological and spontaneous symmetry-breaking paradigms established for closed, pure-state systems. Developing a unified and physically transparent classification of s...
Imperfect Graphs from Unitary Matrices -- I
Wesley Lewis, Darsh Pareek, Umesh Kumar +1 more·Feb 25, 2026
Matrix representations of quantum operators are computationally complete but often obscure the structural topology of information flow within a quantum circuit \cite{nielsen2000}. In this paper, we introduce a generalized graph-theoretic framework fo...
Topological phase dynamics described by overtone-synthesized classical and quantum Adler equations
Hiroshi Yamaguchi, Motoki Asano·Feb 25, 2026
The Adler equation is a well-known one-dimensional model describing phase locking and synchronization. Motivated by recent experiments using optomechanical oscillators, we extend the model to include overtone-synthesized sinusoidal coupling with adia...
Detecting Higher Berry Phase via Boundary Scattering
Chih-Yu Lo, Xueda Wen·Feb 24, 2026
Higher Berry phase has recently been proposed to study the topology of the space of gapped many-body quantum systems. In this work, we develop a boundary-scattering approach to detect higher Berry phases in one-dimensional gapped free-fermion systems...
Teleportation transition of surface codes on a superconducting quantum processor
Yiren Zou, Hong-Kuan Xia, Aosai Zhang +32 more·Feb 24, 2026
The topological surface code is a leading candidate for harnessing long-range entanglement to protect logical quantum information against errors, and teleportation of logical states is desirable for robust quantum information processing. Nevertheless...
Topological Floquet Green's function zeros
Elio J. König, Aditi Mitra·Feb 24, 2026
Motivated by recent advances in digital quantum emulation using noisy intermediate-scale quantum (NISQ) devices and an increased interest in topological Green's function zeros in condensed matter systems, we here study Green's function zeros in topol...
Non-Clifford symmetry protected topological higher-order cluster states in multi-qubit measurement-based quantum computation
Motohiko Ezawa·Feb 24, 2026
A cluster state is a strongly entangled state, which is a source of measurement-based quantum computation. It is generated by applying controlled-Z (CZ) gates to the state $\left\vert ++\cdots +\right\rangle $. It is protected by the $\mathbb{Z}_{2}^...
Revealing Pseudo-Fermionization and Chiral Binding of One-Dimensional Anyons using Adiabatic State Preparation
Brice Bakkali-Hassani, Joyce Kwan, Perrin Segura +5 more·Feb 23, 2026
Fractional statistics give rise to quantum behaviors that differ fundamentally from those of bosons and fermions. While two-dimensional anyons play a major role in strongly correlated systems and topological quantum computing, the nature of their one...
Separation of the Kibble-Zurek Mechanism from Quantum Criticality
R. Jafari, Alireza Akbari·Feb 23, 2026
When a system is swept through a quantum critical point (QCP), the Kibble-Zurek mechanism predicts that the average number of topological defects follows a universal power-law scaling with the ramp time scale. This scaling behavior is determined by t...
Calderbank-Shor-Steane codes on group-valued qudits
Ben T. McDonough, Jian-Hao Zhang, Victor V. Albert +1 more·Feb 23, 2026
Calderbank-Shor-Steane (CSS) codes are a versatile quantum error-correcting family built out of commuting $X$- and $Z$-type checks. We introduce CSS-like codes on $G$-valued qudits for any finite group $G$ that reduce to qubit CSS codes for $G = \mat...
Self-correction phase transition in the dissipative toric code
Sanjeev Kumar, Hendrik Weimer·Feb 22, 2026
We analyze a time-continuous version of a cellular automaton decoder for the toric code in the form of a Lindblad master equation. In this setting, a self-correcting quantum memory becomes a thermodynamical phase of the steady state, which manifests ...
A Physics-Informed Neuro-Fuzzy Framework for Quantum Error Attribution
Marwa R. Hassan, Naima Kaabouch·Feb 22, 2026
As quantum processors scale beyond 100 qubits, distinguishing software bugs from stochastic hardware noise becomes a critical diagnostic challenge. We present a neuro-fuzzy framework that addresses this attribution problem by combining Adaptive Neuro...
Nonabelian Anyons attached to Superconducting Islands in FQH Liquids
Hisham Sati, Urs Schreiber·Feb 21, 2026
The idea that topologically protected quantum states, such as anyons, may be attached to super/semiconductor heterostructures has received enormous attention, but experimental signatures in 1D systems remain elusive. Here we revisit theoretical under...
Topological Boundary Time Crystal Oscillations
Dominik Nemeth, Ahsan Nazir, Alessandro Principi +1 more·Feb 19, 2026
Boundary time crystals (BTCs) break time-translation symmetry and exhibit long-lived, robust oscillations insensitive to initial conditions. We show that collective spin BTCs can admit emergent topological winding numbers in operator space. Expanding...
Matrix-product operator dualities in integrable lattice models
Yuan Miao, Andras Molnar, Nick G. Jones·Feb 19, 2026
Matrix-product operators (MPOs) appear throughout the study of integrable lattice models, notably as the transfer matrices. They can also be used as transformations to construct dualities between such models, both invertible (including unitary) and n...
Quantum Circuits as a Dynamical Resource to Learn Nonequilibrium Long-Range Order
Fabian Ballar Trigueros, Markus Heyl·Feb 18, 2026
Equilibrium statistical ensembles impose stringent constraints on phases of quantum matter. For example, the Mermin-Wagner theorem prohibits long-range order in low-dimensional systems beyond the ground state. Here, we show that quantum circuits can ...
Entropic Barriers and the Kinetic Suppression of Topological Defects
Yi-Lin Tsao, Zhu-Xi Luo·Feb 18, 2026
Many quantum phases, from topological orders to superfluids, are destabilized at finite temperature by the proliferation and motion of topological defects such as anyons or vortices. Conventional protection mechanisms rely on energetic gaps and fail ...