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15 papers · 1 filter
Measurement-only circuit of perturbed toric code on triangular lattice: Topological entanglement, 1-form symmetry and logical qubits
Keisuke Kataoka, Yoshihito Kuno, Takahiro Orito +1
Measurement-only (quantum) circuit (MoC) gives possibility to realize the states with rich entanglements, topological orders and quantum memories. This work studies the MoC, in whi…
Strong and weak symmetries and their spontaneous symmetry breaking in mixed states emerging from the quantum Ising model under multiple decoherence
Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose
Discovering and categorizing quantum orders in mixed many-body systems are currently one of the most important problems. Specific types of decoherence applied to typical quantum ma…
Intrinsic mixed state topological order in a stabilizer system under stochastic decoherence: Strong-to-weak spontaneous symmetry breaking from percolation point of view
Yoshihito Kuno, Takahiro Orito, Ikuo Ichinose
Discovering quantum orders in mixed many-body systems is an ongoing issue. Very recently, the notion of an intrinsic mixed state topologically-ordered (IMTO) state was proposed. As…
Strong-to-weak symmetry breaking states in stochastic dephasing stabilizer circuits
Yoshihito Kuno, Takahiro Orito, Ikuo Ichinose
Discovering mixed state quantum orders is an on-going issue. Recently, it has been recognized that there are (at least) two kinds of symmetries in the mixed state; strong and weak…
Measurement-only dynamical phase transition of topological and boundary order in toric code and gauge-Higgs models
Takahiro Orito, Yoshihito Kuno, Ikuo Ichinose
We extensively study long-time dynamics and fate of topologically-ordered state in toric code model evolving through projective measurement-only circuit. The circuit is composed of…
Purification and scrambling in a chaotic Hamiltonian dynamics with measurements
Yoshihito Kuno, Takahiro Orito, Ikuo Ichinose
Chaotic transverse-field Ising model with measurements exhibits interesting purification dynamics. Ensemble of non-unitary dynamics of a chaotic many-body system with measurements…