Real-time renormalization group on quantum operations produces chaotic flows in coherent-dominant regimes, and the measurement-induced PT transition belongs to the 1D Yang-Lee edge singularity universality class.
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Analytic expressions for the two-qubit mean-force Gibbs state show that reservoir-mediated entanglement is highest at low temperature, non-monotonic in coupling strength, and can be enhanced by broadening the reservoir spectral density.
Single-particle interference is governed by the relative phase between the prepared quantum state and the detector-defined measurement basis, with equivalent sinusoidal fringes produced by independent scans of pump, seed, or signal phases and visibility tuned by idler overlap.
Nonnormality is an intrinsically dissipative property of Lindbladian generators that controls transient growth in open quantum dynamics and increases the cost of quantum simulations.
Symmetry class alone sets SWSSB correlation length growth to exponential (Z2, tc ~ ln L) or algebraic (U(1), tc ~ L^alpha with alpha filling-dependent) in open quantum systems, independent of spectral gap.
Undamped modes exist for any N >= 3 in Heisenberg chains with collective dissipation and are characterized via Bethe ansatz.
Stable edge-qubit synchronization and constant asymptotic entanglement in a dissipative XX chain occur if and only if the decoherence-free subspace contains exactly one single-excitation eigenstate.
Modulating relative weights of interaction channels in a quantum Brownian motion model allows control over non-Markovianity, inducing transitions to Markovian regimes using Gaussian master equations.
A geometric logical T gate in superconducting qubits suppresses Rabi frequency, detuning, and crosstalk errors to fourth order while inherently handling collective dephasing via DFS encoding and optimized pulses.
Simulations demonstrate that Krotov optimal control can achieve gate fidelities ≳0.9 in noisy static exchange-coupled surface qubits by adapting to specific noise sources, outperforming standard Rabi driving.
citing papers explorer
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Renormalization of Quantum Operations: Parity-Time Transition and Chaotic Flows
Real-time renormalization group on quantum operations produces chaotic flows in coherent-dominant regimes, and the measurement-induced PT transition belongs to the 1D Yang-Lee edge singularity universality class.
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Reservoir-mediated spin entanglement in the mean-force Gibbs state
Analytic expressions for the two-qubit mean-force Gibbs state show that reservoir-mediated entanglement is highest at low temperature, non-monotonic in coupling strength, and can be enhanced by broadening the reservoir spectral density.
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Measurement-defined control of single-particle interference
Single-particle interference is governed by the relative phase between the prepared quantum state and the detector-defined measurement basis, with equivalent sinusoidal fringes produced by independent scans of pump, seed, or signal phases and visibility tuned by idler overlap.
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Nonnormality and Dissipation in Markovian Quantum Dynamics: Implications for Quantum Simulation
Nonnormality is an intrinsically dissipative property of Lindbladian generators that controls transient growth in open quantum dynamics and increases the cost of quantum simulations.
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Universal Dynamical Scaling of Strong-to-Weak Spontaneous Symmetry Breaking in Open Quantum Systems
Symmetry class alone sets SWSSB correlation length growth to exponential (Z2, tc ~ ln L) or algebraic (U(1), tc ~ L^alpha with alpha filling-dependent) in open quantum systems, independent of spectral gap.
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Undamped Modes in an N-Qubit Heisenberg Chain with Collective Dissipation
Undamped modes exist for any N >= 3 in Heisenberg chains with collective dissipation and are characterized via Bethe ansatz.
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Synchronization in a dissipative quantum many-body system
Stable edge-qubit synchronization and constant asymptotic entanglement in a dissipative XX chain occur if and only if the decoherence-free subspace contains exactly one single-excitation eigenstate.
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Controlling the non-Markovianity of quantum Brownian motion
Modulating relative weights of interaction channels in a quantum Brownian motion model allows control over non-Markovianity, inducing transitions to Markovian regimes using Gaussian master equations.
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Suppression of Universal Errors in DFS-Encoded Superconducting Geometric Logical \emph{T} Gate
A geometric logical T gate in superconducting qubits suppresses Rabi frequency, detuning, and crosstalk errors to fourth order while inherently handling collective dephasing via DFS encoding and optimized pulses.
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Overcoming limitations on gate fidelity in noisy static exchange-coupled surface qubits
Simulations demonstrate that Krotov optimal control can achieve gate fidelities ≳0.9 in noisy static exchange-coupled surface qubits by adapting to specific noise sources, outperforming standard Rabi driving.