Recognition: no theorem link
Testing ER = EPR with Hydrogen
Pith reviewed 2026-05-17 02:22 UTC · model grok-4.3
The pith
If electric fields leak into wormholes connecting entangled particles, the hyperfine structure of hydrogen changes and the atom may carry a small net charge.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
Under the assumption that some of the electric field surrounding an entangled charged particle leaks into the wormhole, this effect will modify the hyperfine structure of the hydrogen atom. In addition, if the quantum wormholes are non-traversable, this will also lead to a non-zero total effective charge for the hydrogen atom. These effects provide strong constraints on the amplitude of this potential ER = EPR effect, given high-precision measurements of the hydrogen atom's hyperfine structure and total charge.
What carries the argument
Leakage of electric field lines from an entangled charged particle into the quantum wormhole that connects it to its partner, which changes the electromagnetic potential experienced by the electron in the hydrogen atom.
If this is right
- The hyperfine splitting interval in hydrogen receives an extra correction proportional to the leakage amplitude.
- A neutral hydrogen atom acquires a small nonzero effective charge when the connecting wormholes are non-traversable.
- Existing or future high-precision spectroscopy and charge-neutrality tests of hydrogen directly limit the strength of any ER = EPR wormhole effect.
Where Pith is reading between the lines
- The same leakage mechanism could be applied to other light atoms such as deuterium to obtain independent bounds.
- Absence of the predicted shifts would suggest that electric fields remain fully outside any wormholes or that the ER = EPR conjecture requires additional structure.
- Experiments that prepare entangled pairs of charged particles in controlled superpositions might detect analogous electromagnetic signatures.
Load-bearing premise
Some of the electric field around an entangled charged particle leaks into the connecting quantum wormhole.
What would settle it
A laboratory measurement of the hydrogen hyperfine transition frequency that agrees with the standard quantum-electrodynamics value to the precision needed to rule out the predicted shift, or a direct confirmation that a neutral hydrogen atom carries exactly zero net charge.
read the original abstract
According to the ER = EPR conjecture, entangled particles are connected by quantum wormholes. Under the assumption that some of the electric field surrounding an entangled charged particle leaks into the wormhole, we show that this effect will modify the hyperfine structure of the hydrogen atom. In addition, if the quantum wormholes are non-traversable, this will also lead to a non-zero total effective charge for the hydrogen atom. These effects provide strong constraints on the amplitude of this potential ER = EPR effect, given high-precision measurements of the hydrogen atom's hyperfine structure and total charge.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper claims that, according to the ER=EPR conjecture, entangled charged particles are connected by quantum wormholes into which some of the surrounding electric field leaks. This leakage modifies the hyperfine structure of the hydrogen atom via changes to the local electric and magnetic fields experienced by the electron. For non-traversable wormholes the effect additionally produces a non-zero total effective charge for the neutral hydrogen atom. High-precision measurements of hyperfine splitting and charge neutrality are then invoked to place constraints on the amplitude of the leakage.
Significance. If the leakage fraction could be derived from a controlled ER=EPR dictionary or explicit bulk geometry, the proposal would constitute a rare attempt to extract a low-energy, falsifiable signature of quantum gravity from atomic spectroscopy. The manuscript correctly identifies that existing hyperfine data already reach parts-per-billion precision, so even a small effect could be bounded; however, the present formulation remains a phenomenological rescaling rather than a sharp prediction.
major comments (2)
- [Abstract / model section] Abstract and the model section: the central claim that leakage modifies the hyperfine splitting (via altered Coulomb and magnetic-dipole interactions) is introduced as an assumption rather than derived from the ER=EPR dictionary, a specific throat geometry, or a flux calculation through a Planck-scale bridge at atomic distances. No equation quantifies the leakage fraction from first principles; the shift is therefore proportional to a free amplitude parameter whose value is constrained rather than predicted.
- [non-traversable wormholes discussion] Section discussing non-traversable wormholes: the assertion of a non-zero effective charge for the hydrogen atom assumes the wormhole functions as an open flux sink. No explicit check is performed against Gauss’s law in the boundary theory or against charge conservation in the CFT, leaving open whether the claimed net charge is consistent with the underlying holographic setup.
minor comments (2)
- [throughout] Notation for the leakage amplitude should be introduced once with a clear symbol and kept consistent; currently the parameter appears under several informal descriptions.
- [results section] A brief comparison table of the predicted hyperfine shift versus current experimental uncertainty would help readers assess the constraining power immediately.
Simulated Author's Rebuttal
We thank the referee for the careful reading of our manuscript and for the constructive comments. We address each major comment below and have revised the manuscript to improve clarity on the phenomenological nature of the proposal.
read point-by-point responses
-
Referee: [Abstract / model section] Abstract and the model section: the central claim that leakage modifies the hyperfine splitting (via altered Coulomb and magnetic-dipole interactions) is introduced as an assumption rather than derived from the ER=EPR dictionary, a specific throat geometry, or a flux calculation through a Planck-scale bridge at atomic distances. No equation quantifies the leakage fraction from first principles; the shift is therefore proportional to a free amplitude parameter whose value is constrained rather than predicted.
Authors: We agree that the leakage fraction is introduced as a phenomenological assumption motivated by the ER=EPR conjecture rather than derived from a specific dictionary, throat geometry, or first-principles flux calculation. The manuscript explores observable consequences under this assumption and uses precision data to constrain the amplitude. We have revised the abstract and model section to state explicitly that the amplitude is a free parameter whose value is bounded by experiment, and that the work provides constraints on a possible ER=EPR effect rather than a sharp prediction from a complete holographic model. revision: yes
-
Referee: [non-traversable wormholes discussion] Section discussing non-traversable wormholes: the assertion of a non-zero effective charge for the hydrogen atom assumes the wormhole functions as an open flux sink. No explicit check is performed against Gauss’s law in the boundary theory or against charge conservation in the CFT, leaving open whether the claimed net charge is consistent with the underlying holographic setup.
Authors: The non-zero effective charge follows from treating the non-traversable wormhole as a flux sink in the effective low-energy description. We acknowledge that a rigorous verification against Gauss’s law in the boundary theory and charge conservation in the CFT would require a more complete holographic construction, which lies beyond the scope of the present phenomenological analysis. We have added a clarifying paragraph in the revised section on non-traversable wormholes that explicitly notes this assumption and its implications for holographic consistency. revision: partial
Circularity Check
No circularity: derivation is conditional on explicit leakage assumption with independent calculation
full rationale
The paper states its central assumption explicitly ('some of the electric field surrounding an entangled charged particle leaks into the wormhole') and derives the hyperfine modification and effective charge as direct consequences of that assumption using standard atomic physics. No equation or result reduces to the input by construction; the leakage amplitude remains a free parameter that is constrained by data rather than fitted and relabeled as a prediction. No self-citations, uniqueness theorems, or ansatzes are invoked as load-bearing steps in the provided text. The chain is self-contained and falsifiable via precision measurements of hydrogen.
Axiom & Free-Parameter Ledger
free parameters (1)
- leakage amplitude
axioms (2)
- domain assumption ER=EPR conjecture holds for entangled charged particles
- ad hoc to paper some electric field leaks into the wormhole
Reference graph
Works this paper leans on
-
[1]
Holographic Derivation of Entanglement Entropy from AdS/CFT
S. Ryu and T. Takayanagi, “Holographic derivation of entanglement entropy from AdS/CFT,” Phys. Rev. Lett.96(2006) 181602,arXiv:hep-th/0603001
work page internal anchor Pith review Pith/arXiv arXiv 2006
-
[2]
Aspects of Holographic Entanglement Entropy
S. Ryu and T. Takayanagi, “Aspects of Holographic Entanglement Entropy,” JHEP08(2006) 045, arXiv:hep-th/0605073
work page internal anchor Pith review Pith/arXiv arXiv 2006
-
[3]
Building up spacetime with quantum entanglement,
M. Van Raamsdonk, “Building up spacetime with quantum entanglement,” Gen. Rel. Grav.42(2010) 2323–2329,arXiv:1005.3035
-
[4]
Gravitational Dynamics From Entanglement "Thermodynamics"
N. Lashkari, M. B. McDermott, and M. Van Raamsdonk, “Gravitational dynamics from entanglement ’thermodynamics’,” JHEP04(2014) 195, arXiv:1308.3716
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[5]
Gravitation from Entanglement in Holographic CFTs
T. Faulkner, M. Guica, T. Hartman, R. C. Myers, and M. Van Raamsdonk, “Gravitation from Entanglement in Holographic CFTs,” JHEP03(2014) 051, arXiv:1312.7856
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[6]
Apparent horizons, black hole entropy and loop quantum gravity
V. Husain, “Apparent horizons, black hole entropy and loop quantum gravity,” Phys. Rev. D59(1999) 084019, arXiv:gr-qc/9806115
work page internal anchor Pith review Pith/arXiv arXiv 1999
-
[7]
Entanglement Entropy in Loop Quantum Gravity
W. Donnelly, “Entanglement entropy in loop quantum gravity,” Phys. Rev. D77(2008) 104006, arXiv:0802.0880
work page internal anchor Pith review Pith/arXiv arXiv 2008
-
[8]
Group field theory as the 2nd quantization of Loop Quantum Gravity
D. Oriti, “Group field theory as the 2nd quantization of Loop Quantum Gravity,” Class. Quant. Grav.33 (2016) 085005,arXiv:1310.7786
work page internal anchor Pith review Pith/arXiv arXiv 2016
-
[9]
Group Field theory and Tensor Networks: towards a Ryu-Takayanagi formula in full quantum gravity
G. Chirco, D. Oriti, and M. Zhang, “Group field theory and tensor networks: towards a Ryu–Takayanagi formula in full quantum gravity,” Class. Quant. Grav. 35(2018) 115011,arXiv:1701.01383
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[10]
Gluing polyhedra with entanglement in loop quantum gravity
B. Bayta¸ s, E. Bianchi, and N. Yokomizo, “Gluing polyhedra with entanglement in loop quantum gravity,” Phys. Rev. D98(2018) 026001,arXiv:1805.05856
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[11]
On the Architecture of Spacetime Geometry
E. Bianchi and R. C. Myers, “On the Architecture of Spacetime Geometry,” Class. Quant. Grav.31(2014) 214002,arXiv:1212.5183
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[12]
Universality of Gravity from Entanglement
B. Swingle and M. Van Raamsdonk, “Universality of Gravity from Entanglement,”arXiv:1405.2933
work page internal anchor Pith review Pith/arXiv arXiv
-
[13]
L. Smolin, “Fermions and topology,” arXiv:gr-qc/9404010
work page internal anchor Pith review Pith/arXiv arXiv
-
[14]
Disordered locality in loop quantum gravity states
F. Markopoulou and L. Smolin, “Disordered locality in loop quantum gravity states,” Class. Quant. Grav.24 (2007) 3813–3824,arXiv:gr-qc/0702044
work page internal anchor Pith review Pith/arXiv arXiv 2007
-
[15]
Quantum Graphity: a model of emergent locality
T. Konopka, F. Markopoulou, and S. Severini, “Quantum Graphity: A Model of emergent locality,” Phys. Rev. D77(2008) 104029,arXiv:0801.0861
work page internal anchor Pith review Pith/arXiv arXiv 2008
-
[16]
Disordered Locality as an Explanation for the Dark Energy
C. Prescod-Weinstein and L. Smolin, “Disordered Locality as an Explanation for the Dark Energy,” Phys. Rev. D80(2009) 063505,arXiv:0903.5303
work page internal anchor Pith review Pith/arXiv arXiv 2009
-
[17]
Phenomenology of Space-time Imperfection I: Nonlocal Defects
S. Hossenfelder, “Phenomenology of Space-time Imperfection I: Nonlocal Defects,” Phys. Rev. D88 (2013) 124030,arXiv:1309.0311
work page internal anchor Pith review Pith/arXiv arXiv 2013
-
[18]
Cool horizons for entangled black holes
J. Maldacena and L. Susskind, “Cool horizons for entangled black holes,” Fortsch. Phys.61(2013) 781–811,arXiv:1306.0533
work page internal anchor Pith review Pith/arXiv arXiv 2013
-
[19]
H. Gharibyan and R. F. Penna, “Are entangled particles connected by wormholes? Evidence for the ER=EPR conjecture from entropy inequalities,” Phys. Rev. D89(2014) 066001,arXiv:1308.0289
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[20]
Multiboundary Wormholes and Holographic Entanglement
V. Balasubramanian, P. Hayden, A. Maloney, D. Marolf, and S. F. Ross, “Multiboundary Wormholes and Holographic Entanglement,” Class. Quant. Grav. 31(2014) 185015,arXiv:1406.2663
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[21]
L. Susskind, “Dear Qubitzers, GR=QM,” arXiv:1708.03040
work page internal anchor Pith review Pith/arXiv arXiv
-
[22]
D.-C. Dai and D. Stojkovic, “Observing a Wormhole,” Phys. Rev. D100(2019) 083513,arXiv:1910.00429
-
[23]
Potential Consequences of Wormhole-Mediated Entanglement,
E. Wilson-Ewing, “Potential Consequences of Wormhole-Mediated Entanglement,” Found. Phys.51 (2021) 87,arXiv:2108.07607
-
[24]
D.-C. Dai, D. Minic, D. Stojkovic, and C. Fu, “Testing theER=EPRconjecture,” Phys. Rev. D102(2020) 066004,arXiv:2002.08178
-
[25]
Traversable Wormholes via a Double Trace Deformation,
P. Gao, D. L. Jafferis, and A. C. Wall, “Traversable Wormholes via a Double Trace Deformation,” JHEP12 (2017) 151,arXiv:1608.05687
-
[26]
Traversable wormholes in Einstein-Dirac-Maxwell theory,
J. L. Bl´ azquez-Salcedo, C. Knoll, and E. Radu, “Traversable wormholes in Einstein-Dirac-Maxwell theory,” Phys. Rev. Lett.126(2021) 101102, arXiv:2010.07317
-
[27]
ER = EPR revisited: On the Entropy of an Einstein-Rosen Bridge,
H. Verlinde, “ER = EPR revisited: On the Entropy of an Einstein-Rosen Bridge,”arXiv:2003.13117
-
[28]
The Hydrogen Atom as an Entangled Electron-Proton System
P. Tommasini, E. Timmermans, and A. F. R. de Toledo Piza, “The Hydrogen atom as an entangled electron proton system,” Am. J. Phys.66(1998) 881, arXiv:quant-ph/9709052
work page internal anchor Pith review Pith/arXiv arXiv 1998
-
[29]
S. Qvarfort, S. Bose, and A. Serafini, “Hydrogenic entanglement,” New J. Phys.22(2020) 093062, arXiv:2002.10383
-
[30]
CODATA recommended values of the fundamental physical constants: 2022,
P. J. Mohr, D. B. Newell, B. N. Taylor, and E. Tiesinga, “CODATA recommended values of the fundamental physical constants: 2022,” Rev. Mod. Phys.97(2025) 025002,arXiv:2409.03787
-
[31]
Two-photon frequency comb spectroscopy of atomic hydrogen,
A. Grinin, A. Matveev, D. C. Yost, L. Maisenbacher, V. Wirthl, R. Pohl, T. W. H¨ ansch, and T. Udem, “Two-photon frequency comb spectroscopy of atomic hydrogen,” Science370(2020) abc7776
work page 2020
-
[32]
Determination of the Rydberg constant from the emission spectra of H and He+,
K. D. Shaffer, “Determination of the Rydberg constant from the emission spectra of H and He+,” Ramifications2(2020) 5
work page 2020
-
[33]
D. Bourilkov, “Hint for axial vector contact interactions in the data on e+ e- —>e+ e-(gamma) at center-of-mass energies 192-GeV - 208-GeV,” Phys. Rev. D64(2001) 071701,arXiv:hep-ph/0104165
work page internal anchor Pith review Pith/arXiv arXiv 2001
-
[34]
New Determination of the Fine Structure Constant from the Electron g Value and QED,
G. Gabrielse, D. Hanneke, T. Kinoshita, M. Nio, and B. C. Odom, “New Determination of the Fine Structure Constant from the Electron g Value and QED,” Phys. Rev. Lett.97(2006) 030802. [Erratum: Phys.Rev.Lett. 99, 039902 (2007)]
work page 2006
-
[35]
D. J. Griffiths and D. F. Schroeter,Introduction to Quantum Mechanics. Cambridge University Press, 2018
work page 2018
-
[36]
J. R. Pritchard and A. Loeb, “21-cm cosmology,” Rept. Prog. Phys.75(2012) 086901,arXiv:1109.6012. 6
work page internal anchor Pith review Pith/arXiv arXiv 2012
-
[37]
Measurement of the unperturbed hydrogen hyperfine transition frequency,
H. Hellwig, R. F. C. Vessot, M. W. Levine, P. W. Zitzewitz, D. W. Allan, and D. J. Glaze, “Measurement of the unperturbed hydrogen hyperfine transition frequency,” IEEE Transactions on Instrumentation and Measurement19(2007) 200–209
work page 2007
-
[38]
Search for a Small Charge Carried by Molecules,
J. G. King, “Search for a Small Charge Carried by Molecules,” Phys. Rev. Lett.5(1960) 562–565
work page 1960
-
[39]
Nonequilibrium entanglement between levitated masses under optimal control,
A. N. Poddubny, K. Winkler, B. A. Stickler, U. Deli´ c, M. Aspelmeyer, and A. V. Zasedatelev, “Nonequilibrium entanglement between levitated masses under optimal control,”arXiv:2408.06251
-
[40]
Steady-state entanglement of interacting masses in free space through optimal feedback control,
K. Winkler, A. V. Zasedatelev, B. A. Stickler, U. Deli´ c, A. Deutschmann-Olek, and M. Aspelmeyer, “Steady-state entanglement of interacting masses in free space through optimal feedback control,” arXiv:2408.07492
-
[41]
Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement,
T. Fernholz, H. Krauter, K. Jensen, J. F. Sherson, A. S. Sørensen, and E. S. Polzik, “Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement,” Phys. Rev. Lett.101(2008) 073601
work page 2008
-
[42]
Coherent spin dynamics between electron and nucleus within a single atom,
L. M. Veldman, E. W. Stolte, M. P. Canavan, R. Broekhoven, P. Willke, L. Farinacci, and S. Otte, “Coherent spin dynamics between electron and nucleus within a single atom,” Nature Commun.15(2024) 7951,arXiv:2309.03749
-
[43]
S. Lim, M. V. Vaganov, J. Liu, and A. Ardavan, “Demonstrating Experimentally the Encoding and Dynamics of an Error-Correctable Logical Qubit on a Hyperfine-Coupled Nuclear Spin Qudit,” Phys. Rev. Lett.134(2025) 070603,arXiv:2405.20827
-
[44]
P. Goy, J. M. Raimond, G. Vitrant, and S. Haroche, “Millimeter-wave spectroscopy in cesium Rydberg states. Quantum defects, fine-and hyperfine-structure measurements,” Phys. Rev. A26(1982) 2733
work page 1982
-
[45]
Accurate energies ofnS,nP,nD,nF, andnGlevels of neutral cesium,
K.-H. Weber and C. J. Sansonetti, “Accurate energies ofnS,nP,nD,nF, andnGlevels of neutral cesium,” Phys. Rev. A35(1987) 4650
work page 1987
-
[46]
W. Li, I. Mourachko, M. W. Noel, and T. F. Gallagher, “Millimeter-wave spectroscopy of cold Rb Rydberg atoms in a magneto-optical trap: Quantum defects of thens,np, andndseries,” Phys. Rev. A67(2003) 052502
work page 2003
-
[47]
Rbnfquantum defects from millimeter-wave spectroscopy of cold 85Rb Rydberg atoms,
J. Han, Y. Jamil, D. V. L. Norum, P. J. Tanner, and T. F. Gallagher, “Rbnfquantum defects from millimeter-wave spectroscopy of cold 85Rb Rydberg atoms,” Phys. Rev. A74(2006) 054502
work page 2006
-
[48]
M. Mack, F. Karlewski, H. Hattermann, S. H¨ ockh, F. Jessen, D. Cano, and J. Fort´ agh, “Measurement of absolute transition frequencies of 87Rb tonSandnD Rydberg states by means of electromagnetically induced transparency,” Phys. Rev. A83(2011) 052515
work page 2011
-
[49]
Precision measurement of the ionization energy of Cs I,
J. Deiglmayr, H. Herburger, H. Saßmannshausen, P. Jansen, H. Schmutz, and F. Merkt, “Precision measurement of the ionization energy of Cs I,” Phys. Rev. A93(2016) 013424
work page 2016
-
[50]
Precision measurement of the ionization energy and quantum defects of 39K I,
M. Peper, F. Helmrich, J. Butscher, J. A. Agner, H. Schmutz, F. Merkt, and J. Deiglmayr, “Precision measurement of the ionization energy and quantum defects of 39K I,” Phys. Rev. A100(2019) 012501
work page 2019
-
[51]
A Spin Entanglement Witness for Quantum Gravity
S. Bose, A. Mazumdar, G. W. Morley, H. Ulbricht, M. Toroˇ s, M. Paternostro, A. Geraci, P. Barker, M. S. Kim, and G. Milburn, “Spin Entanglement Witness for Quantum Gravity,” Phys. Rev. Lett.119(2017) 240401,arXiv:1707.06050
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[52]
C. Marletto and V. Vedral, “Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity,” Phys. Rev. Lett.119(2017) 240402,arXiv:1707.06036
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[53]
On the possibility of laboratory evidence for quantum superposition of geometries,
M. Christodoulou and C. Rovelli, “On the possibility of laboratory evidence for quantum superposition of geometries,” Phys. Lett. B792(2019) 64–68, arXiv:1808.05842
-
[54]
Locally Mediated Entanglement in Linearized Quantum Gravity,
M. Christodoulou, A. Di Biagio, M. Aspelmeyer, ˇC. Brukner, C. Rovelli, and R. Howl, “Locally Mediated Entanglement in Linearized Quantum Gravity,” Phys. Rev. Lett.130(2023) 100202,arXiv:2202.03368
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.