12 papers
Quantum Rényi-Jarzynski Equality
Benjamin Bobell, Mert Okyay, Rahul Nandkishore
The Jarzynski equality provides a strict link between nonequilibrium work and equilibrium free energy changes. Its typical quantum formulations, however, rely on measurement protoc…
Measuring intrinsic relaxation rates in superconductors using nonlinear response
Wei-En Tseng, Rahul Nandkishore
We discuss intrinsic relaxation rates in superconductors, and how they may be measured using non-linear optical (terahertz) response. We consider both and -wave superconduct…
Quantum Fragmentation
Yiqiu Han, Oliver Hart, Alexey Khudorozhkov +1
We introduce a systematic protocol for constructing quantum Hilbert-space-fragmented Hamiltonians, whose Krylov-sector structure, unlike in classically fragmented models, can be fu…
Fingerprinting fractons with pump-probe spectroscopy
Wei-En Tseng, Oliver Hart, Rahul Nandkishore
We demonstrate how pump-probe techniques enable specific spectroscopic diagnostics of fracton phases of matter by studying lineon-planon braiding in the paradigmatic X-cube model.…
Profusion of Symmetry-Protected Qubits from Stable Ergodicity Breaking
Thomas Iadecola, Rahul Nandkishore
We show how combining a discrete symmetry with topological Hilbert space fragmentation can give rise to exponentially many topologically stable qubits protected by a single discret…
Many-body contextuality and self-testing quantum matter via nonlocal games
Oliver Hart, David T. Stephen, Evan Wickenden +1
Contextuality is arguably the fundamental property that makes quantum mechanics different from classical physics. It is responsible for quantum computational speedups in both magic…