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Researchers at Zhengzhou University have demonstrated a breakthrough in quantum information processing by using parity-time (PT)-symmetric systems with balanced gain and loss to accelerate two-qubit entanglement preparation. This method overcomes the traditional trade-off between speed and fidelity, achieving rapid generation of high-quality entangled states across up to ten qubits while maintaining resilience against errors near exceptional points. The findings suggest that active PT-symmetric architectures could significantly enhance the scalability and efficiency of future quantum networks and computing resources.
Faster entanglement prep with balanced gain and loss

npj Quantum Information reports two-qubit quantum entanglement preparation is accelerated in parity-time (PT)-symmetric systems, overcoming fidelity limitations with balanced gain and loss.
Researchers at Zhengzhou University and collaborating institutions have demonstrated a method for creating entanglement in up to 10 qubits, overcoming a fundamental trade-off between the quality and speed of quantum connections. The work identifies that minimal evolution time is…
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