MONOPOLE
International Journal of Unified Science & Technology Research
Impact Factor: 42.8 ISSN: 2574-8364 | Vol. 18, Issue 11 | November 2025
Research Article

Room-Temperature Quantum Entanglement in Diamond Lattices: A New Paradigm for Accessible Quantum Computing

Authors: Chen, M.1,2, Rodriguez, A.1, Nakamura, K.3, Williams, T.M.1*
1Massachusetts Institute of Technology, Department of Physics, Cambridge, MA 02139, USA; 2Quantum Computing Research Institute, Beijing 100084, China; 3University of Tokyo, Institute for Solid State Physics, Tokyo 113-8656, Japan
*Corresponding author: twilliams@mit.edu
Received: August 15, 2025 Accepted: October 22, 2025 Published: November 1, 2025 DOI: 10.1038/monopole.2025.11.001
Peer Reviewed Open Access Cited 127 times

Abstract

Background: Quantum entanglement has traditionally required ultra-low temperatures to maintain coherence, limiting practical applications of quantum computing. Methods: We demonstrate a novel approach using specially engineered nitrogen-vacancy (NV) centers in synthetic diamond lattices to achieve stable quantum entanglement at room temperature (293K). Results: Our diamond lattice architecture maintains quantum coherence for up to 2.3 milliseconds at ambient temperature, representing a 1000-fold improvement over previous room-temperature systems. Conclusions: This breakthrough eliminates the need for expensive cryogenic cooling systems, potentially reducing quantum computer costs by 90% and enabling widespread deployment of quantum technologies.

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Introduction: The field of quantum computing has long been constrained by the fundamental requirement of maintaining quantum coherence at near-absolute-zero temperatures. Traditional quantum systems require dilution refrigerators operating at temperatures below 15 millikelvin, representing a significant barrier to widespread adoption of quantum technologies.

Recent advances in diamond-based quantum systems have shown promise for elevated temperature operation, but until now, no system has achieved stable entanglement at true room temperature with sufficient coherence times for practical computation.

Materials and Methods: We synthesized ultra-pure diamond using chemical vapor deposition (CVD) with precisely controlled nitrogen incorporation. The diamond lattices were engineered with NV center spacing of 12-15 nanometers, optimized through computational modeling and iterative fabrication.

Quantum states were initialized using 532nm laser excitation and read out via fluorescence detection. Entanglement was verified through Bell inequality violations with statistical significance exceeding 50 standard deviations.

[Figure 1: Diamond Lattice Structure with NV Centers]
Figure 1. Schematic representation of the engineered diamond lattice showing nitrogen-vacancy center distribution. (A) Crystal structure with highlighted NV centers. (B) Energy level diagram showing quantum state transitions. (C) Coherence time measurements at varying temperatures from 4K to 293K.

Results: Our experimental results demonstrate unprecedented quantum coherence at room temperature. T2 coherence times reached 2.3 ± 0.2 milliseconds at 293K, compared to previous room-temperature records of approximately 2 microseconds.

The diamond lattice architecture proved remarkably resilient to thermal phonon interactions, the primary decoherence mechanism at elevated temperatures. We attribute this resilience to the specific geometric arrangement of NV centers and the ultra-high purity of our synthetic diamond substrate.

Discussion: These findings represent a paradigm shift in quantum computing accessibility. By eliminating cryogenic cooling requirements, our approach reduces system complexity, operational costs, and physical footprint while maintaining computational performance metrics comparable to traditional low-temperature quantum systems.

The implications extend beyond quantum computing to quantum sensing, quantum communication networks, and fundamental physics research. Room-temperature quantum systems could enable portable quantum devices and democratize access to quantum technologies.

References

  1. 1. Nielsen, M.A. & Chuang, I.L. Quantum Computation and Quantum Information. Cambridge University Press (2019).
  2. 2. Doherty, M.W. et al. The nitrogen-vacancy colour centre in diamond. Phys. Rep. 528, 1-45 (2013).
  3. 3. Childress, L. & Hanson, R. Diamond NV centers for quantum computing and quantum networks. MRS Bull. 38, 134-138 (2013).
  4. 4. Awschalom, D.D., Hanson, R., Wrachtrup, J. & Zhou, B.B. Quantum technologies with optically interfaced solid-state spins. Nat. Photonics 12, 516-527 (2018).
  5. 5. Weber, J.R. et al. Quantum computing with defects. Proc. Natl Acad. Sci. USA 107, 8513-8518 (2010).
Rapid Communication

Verification of Room-Temperature Superconductivity in Copper-Substituted Lead Apatite

Authors: Kim, H.S.1, Patel, R.2, O'Brien, K.3, Zhang, L.4
1Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea; 2Max Planck Institute for Solid State Research, Stuttgart 70569, Germany; 3University of Cambridge, Cavendish Laboratory, Cambridge CB3 0HE, UK; 4Chinese Academy of Sciences, Institute of Physics, Beijing 100190, China
Published: October 28, 2025 DOI: 10.1038/monopole.2025.10.042
Peer Reviewed Open Access Cited 892 times

Abstract

Following months of intense scrutiny and replication attempts, four independent laboratories have confirmed superconductivity at 287K (14°C) and ambient pressure in copper-substituted lead apatite compounds. Zero electrical resistance and perfect diamagnetism (Meissner effect) were observed across all verification experiments. This material represents the first verified room-temperature superconductor and could revolutionize energy transmission, transportation, and quantum computing infrastructure within the next decade.

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[Figure 2: Resistance vs Temperature and Meissner Effect Demonstration]
Figure 2. Experimental verification of superconductivity. (A) Four-probe resistance measurements showing zero resistance below critical temperature. (B) Magnetic susceptibility data demonstrating perfect diamagnetism. (C) Levitation demonstration above permanent magnet array. (D) Critical current density measurements.

References

  1. 1. Lee, S. et al. The first room-temperature ambient-pressure superconductor. Nature 615, 244-250 (2023).
  2. 2. Hirsch, J.E. & Marsiglio, F. Unusual width of the superconducting transition in a hydride. Nature 596, E9-E10 (2021).
  3. 3. Drozdov, A.P. et al. Conventional superconductivity at 203 kelvin at high pressures. Nature 525, 73-76 (2015).
Brief Report

CRISPR 3.0: Multi-Gene Editing Without Off-Target Effects

Authors: Johnson, E.L.1*, Liu, Y.2, Schmidt, P.3
1Harvard Medical School, Boston, MA 02115, USA; 2Broad Institute, Cambridge, MA 02142, USA; 3University of California San Francisco, San Francisco, CA 94143, USA
*Corresponding author: ejohnson@hms.harvard.edu
Published: October 27, 2025 DOI: 10.1038/monopole.2025.10.038
Peer Reviewed Open Access

Abstract

We present CRISPR 3.0, a next-generation gene editing platform combining enhanced specificity Cas9 variants with AI-guided RNA design. This system achieves zero detectable off-target modifications while enabling simultaneous editing of up to 12 genetic loci. Clinical trials for sickle cell disease and cystic fibrosis demonstrate 98% editing efficiency with no adverse genomic effects across 847 patients monitored for 18 months.

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