Scalable quantum information systems would store, manipulate, and transmit quantum information locally and across a quantum network, but no single qubit technology is currently robust enough to perform all necessary tasks. Defect centers in solid-state materials have emerged as potential intermediaries between other physical manifestations of qubits, such as superconducting qubits and photonic qubits, to leverage their complementary advantages. It remains an open question, however, how to design and to control quantum interfaces to defect centers. Such interfaces would enable quantum information to be moved seamlessly between different physical systems. Understanding and constructing the required interfaces would, therefore, unlock the next big steps in quantum computing, sensing, and communications. In this Perspective, we highlight promising coupling mechanisms, including dipole-, phonon-, and magnon-mediated interactions, and discuss how contributions from nanotechnologists will be paramount in realizing quantum information processors in the near-term.Scalable quantum information systems would store, manipulate, and transmit quantum information locally and across a quantum network, but no single qubit technology is currently robust enough to perform all necessary tasks. Defect centers in solid-state materials have emerged as potential intermediaries between other physical manifestations of qubits, such as superconducting qubits and photonic qubits, to leverage their complementary advantages. It remains an open question, however, how to design and to control quantum interfaces to defect centers. Such interfaces would enable quantum information to be moved seamlessly between different physical systems. Understanding and constructing the required interfaces would, therefore, unlock the next big steps in quantum computing, sensing, and communications. In this Perspective, we highlight promising coupling mechanisms, including dipole-, phonon-, and magnon-mediated interactions, and discuss how contributions from nanotechnologists will be paramount in realizing quantum information processors in the near-term.

ACS NanoMay 17, 202120 citations

Open Quantum Systems

Alexander A. Lisyansky, E. S. Andrianov, Alexey P. Vinogradov +1 more

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 20240 citations

Open Quantum Systems

Stephen J. Gustafson, Israel Michael Sigal

UniversitextJan 1, 20200 citations

Dissipation meets conformal interface in open quantum systems: How the relaxation rate is suppressed

Ruhanshi Barad, Qicheng Tang, Xueda Wen

Conformal interfaces play an important role in quantum critical systems. In closed systems, the transmission properties of conformal interfaces are typically characterized by two quantities: One is the effective central charge $c_{\text{eff}}$ , which measures the amount of quantum entanglement through the interface, and the other is the transmission coefficient $c_{\text{LR}}$ , which measures the energy transmission through the interface. In the present work, to characterize the transmission property of conformal interfaces in open quantum systems, we propose a third quantity $c_{\text{relax}}$ , which is defined through the ratio of Liouvillian gaps with and without an interface. Physically, $c_{\text{relax}}$ measures the suppression of the relaxation rate towards a steady state when the system is subject to a local dissipation. We perform both analytical perturbation calculations and exact numerical calculations based on a free fermion chain at the critical point. It is found that $c_{\text{relax}}$ decreases monotonically with the strength of the interface. In particular, $0\le c_{\text{relax}}\le c_{\text{LR}}\le c_{\text{eff}}$ , where the equalities hold if and only if the interface is totally reflective or totally transmissive. Our result for $c_{\text{relax}}$ is universal in the sense that $c_{\text{relax}}$ is independent of (i) the dissipation strength in the weak dissipation regime and (ii) the location where the local dissipation is introduced. Comparing to the previously known $c_{\text{LR}}$ and $c_{\text{eff}}$ in a closed system, our $c_{\text{relax}}$ shows a distinct behavior as a function of the interface strength, suggesting its novelty to characterize conformal interfaces in open systems and offering insights into critical systems under dissipation.Conformal interfaces play an important role in quantum critical systems. In closed systems, the transmission properties of conformal interfaces are typically characterized by two quantities: One is the effective central charge $c_{\text{eff}}$, which measures the amount of quantum entanglement through the interface, and the other is the transmission coefficient $c_{\text{LR}}$, which measures the energy transmission through the interface. In the present work, to characterize the transmission property of conformal interfaces in open quantum systems, we propose a third quantity $c_{\text{relax}}$, which is defined through the ratio of Liouvillian gaps with and without an interface. Physically, $c_{\text{relax}}$ measures the suppression of the relaxation rate towards a steady state when the system is subject to a local dissipation. We perform both analytical perturbation calculations and exact numerical calculations based on a free fermion chain at the critical point. It is found that $c_{\text{relax}}$ decreases monotonically with the strength of the interface. In particular, $0\le c_{\text{relax}}\le c_{\text{LR}}\le c_{\text{eff}}$, where the equalities hold if and only if the interface is totally reflective or totally transmissive. Our result for $c_{\text{relax}}$ is universal in the sense that $c_{\text{relax}}$ is independent of (i) the dissipation strength in the weak dissipation regime and (ii) the location where the local dissipation is introduced. Comparing to the previously known $c_{\text{LR}}$ and $c_{\text{eff}}$ in a closed system, our $c_{\text{relax}}$ shows a distinct behavior as a function of the interface strength, suggesting its novelty to characterize conformal interfaces in open systems and offering insights into critical systems under dissipation.

arXiv:2505.04715Physical review. B./Physical review. BDec 10, 20252 citations

The Lazarus Effect: A Quantum Bio-Interface Model for Post-Mortem Coherence Preservation

P., Gabor

This paper introduces the Lazarus Effect hypothesis, formulated within the Quantum Resonance Unified Model (QRUM) and the Quantum Resonance Bio-Interface Theory (QRBIT). The model explores whether a suitably engineered bio-interface can temporarily suppress post-mortem decoherence and preserve a limited set of quantum-informational degrees of freedom over extended timescales. Using an open-quantum-systems framework, the analysis defines the effective decoherence rate, modified spectral density, non-Markovian backflow conditions, and an interface-mediated information-transduction channel. The “three-day” condition is treated strictly as a mathematical boundary requirement, not as a biological claim. The model shows that post-mortem coherence retention is only possible under extreme, non-physiological suppression of environmental noise, but remains formally consistent as a theoretical construct within QRUM–QRBIT. This work does not assert empirical biological feasibility. It provides a formally defined theoretical hypothesis for coherence retention and information transfer in highly constrained quantum-biophysical systems. All results are exploratory, speculative, and intended for scientific timestamping and conceptual examination.This paper introduces the Lazarus Effect hypothesis, formulated within the Quantum Resonance Unified Model (QRUM) and the Quantum Resonance Bio-Interface Theory (QRBIT). The model explores whether a suitably engineered bio-interface can temporarily suppress post-mortem decoherence and preserve a limited set of quantum-informational degrees of freedom over extended timescales. Using an open-quantum-systems framework, the analysis defines the effective decoherence rate, modified spectral density, non-Markovian backflow conditions, and an interface-mediated information-transduction channel. The “three-day” condition is treated strictly as a mathematical boundary requirement, not as a biological claim. The model shows that post-mortem coherence retention is only possible under extreme, non-physiological suppression of environmental noise, but remains formally consistent as a theoretical construct within QRUM–QRBIT. This work does not assert empirical biological feasibility. It provides a formally defined theoretical hypothesis for coherence retention and information transfer in highly constrained quantum-biophysical systems. All results are exploratory, speculative, and intended for scientific timestamping and conceptual examination.

Nov 28, 20250 citations

c_{\text{eff}}

, which measures the amount of quantum entanglement through the interface, and the other is the transmission coefficient

c_{\text{LR}}

, which measures the energy transmission through the interface. In the present work, to characterize the transmission property of conformal interfaces in open quantum systems, we propose a third quantity

c_{\text{relax}}

, which is defined through the ratio of Liouvillian gaps with and without an interface. Physically,

c_{\text{relax}}

measures the suppression of the relaxation rate towards a steady state when the system is subject to a local dissipation. We perform both analytical perturbation calculations and exact numerical calculations based on a free fermion chain at the critical point. It is found that

c_{\text{relax}}

decreases monotonically with the strength of the interface. In particular,

0\le c_{\text{relax}}\le c_{\text{LR}}\le c_{\text{eff}}

, where the equalities hold if and only if the interface is totally reflective or totally transmissive. Our result for

c_{\text{relax}}

is universal in the sense that

c_{\text{relax}}

is independent of (i) the dissipation strength in the weak dissipation regime and (ii) the location where the local dissipation is introduced. Comparing to the previously known

c_{\text{LR}}

and

c_{\text{eff}}

in a closed system, our

c_{\text{relax}}

shows a distinct behavior as a function of the interface strength, suggesting its novelty to characterize conformal interfaces in open systems and offering insights into critical systems under dissipation.