Work

Quantum Chinese Remainder Clock

Year: 2026

Type: preprint

Abstract: The Chinese remainder theorem is used in metrology for extending the range of quantum clocks/radar/interferometry, where the phase of a signal is known relative to a set of oscillators with different periods. This paper investigates the performance of a quantum-mechanical Chinese remainder clock, consisting of atoms/oscillators with pairwise coprime periods. We provide the optimal initial state and the optimal Heisenberg-limited quantum measurements for measuring time up to the product of the periods. We introduce a novel fault-tolerant post-processing protocol that allows reconstruction of the correct time even in the presence of errors in the remainders.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2608.07938

Authors: Nagar, Ivri, Hamma, Alioscia, Palmero, Mikel, Radzihovsky, Matthew, Yang, Shouzhuo, Lloyd, Seth

Institutions: Instituto de Física Teórica, Massachusetts Institute of Technology, Scuola Superiore Meridionale, University of Naples Federico II, Istituto Nazionale di Fisica Nucleare, University of the Basque Country, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Army Research Office, Army Research Laboratory

Awards: G6681317083, G8978342710

OpenAlex ID: W7202159174

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