IPM Positions

Professor, School of Astronomy (2012 - Present )

Past IPM Positions

Head, School of Astronomy (2017 - 2023) Faculty Member , School of Physics (2008 - 2012)

Research Interests

Early Universe Cosmology, Inflation, Cosmological Perturbation Theory, High Energy Physics

Related Papers

1.	H. Firouzjahi Upper Bounds on the Mass of Fundamental Fields from Primordial Universe Astrophysical Journal 985 (2025), 11  [abstract] Code: IPM/A-2025/54

2.	H. Firouzjahi Two-Loop Corrections in Power Spectrum in Models of Inflation with Primordial Black Hole Formation Universe 10 (2024), 22  [abstract] Code: IPM/A-2024/77

3.	H. Firouzjahi Loop corrections in the bispectrum in ultraslow-roll inflation with PBHs formation Phys. Rev. D 110 (2024), 043519  [abstract] Code: IPM/A-2024/20

4.	H. Firouzjahi Quantum fluctuations in the interior of black holes and backreactions Phys. Rev. D 110 (2024), 025022  [abstract] Code: IPM/A-2024/19

5.	H. Firouzjahi and H. Sheikhahmadi Vacuum zero point energy of self-interacting quantum fields in dS background Phys. Rev. D 109 (2024), 125005  [abstract] Code: IPM/A-2024/17

6.	H. Firouzjahi Revisiting loop corrections in single field ultraslow-roll inflation Phys. Rev. D 109 (2024), 043514  [abstract] Code: IPM/A-2023/36

7.	H. Firouzjahi and A. Riotto Primordial Black Holes and loops in single-field inflation JCAP 2024 (2024), 021  [abstract] Code: IPM/A-2023/38

8.	K. Asadi, A. Nassiri-Rad and H. Firouzjahi Stochastic multiple fields inflation: Diffusion dominated regime Phys. Rev. D 108 (2023),   [abstract] Code: IPM/A-2023/31

9.	H. Firouzjahi and A. Riotto Sign of non-Gaussianity and the primordial black holes abundance Phys. Rev. D 108 (2023),   [abstract] Code: IPM/A-2023/30

10.	A. Talebian, S.A. Hosseini Mansoori and H. Firouzjahi Inflation from Multiple Pseudo-scalar Fields: Primordial Black Hole Dark Matter and Gravitational Waves Astrophysical Journal 948 (2023),   [abstract] Code: IPM/A-2023/24

11.	H. Firouzjahi One-loop corrections in power spectrum in single field inflation JCAP 2023 (2023),   [abstract] Code: IPM/A-2023/14

12.	H. Firouzjahi Loop corrections in gravitational wave spectrum in single field inflation Phys. Rev. D 108 (2023),   [abstract] Code: IPM/A-2023/13

13.	H. Firouzjahi and A. Talebian Induced gravitational waves from ultra slow-roll inflation and pulsar timing arrays observations JCAP 2023 (2023),   [abstract] Code: IPM/A-2023/12

14.	H. Firouzjahi and H. Sheikhahmadi Vacuum Zero Point Energy and its Statistical Correlations in dS Background Phys. Rev. D 108 (2023),   [abstract] Code: IPM/A-2023/05

15.	A. Talebian, A. Nassiri-Rad and H. Firouzjahi Primordial Helical Magnetic Fields from Inflation? Phys. Rev. D 105 (2022),   [abstract] Code: IPM/A-2021/35

16.	S.A. Hosseini Mansoori, A. Talebian, Z. Molaee and H. Firouzjahi Multifield mimetic gravity Phys. Rev. D 105 (2022),   [abstract] Code: IPM/A-2021/36

17.	H. Firouzjahi and A. Talebian White Hole Cosmology and Hawking Radiation from Quantum Cosmological Perturbation Phys. Rev. D 106 (2022),   [abstract] Code: IPM/A-2022/29

18.	H. Moshafi, H. Firouzjahi and A. Talebian Multiple transitions in vacuum dark energy and   tension Astrophysical Journal 920 (2022),   [abstract] Code: IPM/A-2022/28

19.	H. Firouzjahi Cosmological constant problem on the horizon Phys. Rev. D 106 (2022),   [abstract] Code: IPM/A-2022/27

20.	A. Nassiri-Rad, K. Asadi and H. Firouzjahi Inflation with Stochastic Boundary Phys. Rev. D 106 (2022),   [abstract] Code: IPM/A-2022/26

21.	H. Firouzjahi Cosmological constant and vacuum zero point energy in black hole backgrounds Phys. Rev. D 106 (2022),   [abstract] Code: IPM/A-2022/14

22.	S. Hooshangi, A. Talebian, M.H. Namjoo and H. Firouzjahi Multiple field ultraslow-roll inflation: Primordial black holes from straight bulk and distorted boundary Phys. Rev. D 105 (2022),   [abstract] Code: IPM/A-2022/13

23.	H. Firouzjahi, M A. Gorji, Sh. Mukohyama and A. Talebian Dark matter from entropy perturbations in curved field spac Phys. Rev. D 105 (2022),   [abstract] Code: IPM/A-2021/43

24.	H. Firouzjahi, M A. Gorji, Sh. Mukohyama and B. Salehian Dark photon dark matter from charged inflaton Journal of High Energy Physics (JHEP) (2021),   [abstract] Code: IPM/A-2021/13

25.	B. Salehian, M A. Gorji, H. Firouzjahi and Sh. Mukohyama Vector dark matter production from inflation with symmetry breaking Phys. Rev. D 103 (2021),   [abstract] Code: IPM/A-2021/09

26.	S.A. Hosseini Mansoori, A. Talebian and H. Firouzjahi Mimetic Inflation Journal of High Energy Physics (JHEP) (2021),   [abstract] Code: IPM/A-2020/38

27.	M A. Gorji, S.A. Hosseini Mansoori and H. Firouzjahi Inflation with multiple vector fields and non-Gaussianities JCAP 2020 (2020),   [abstract] Code: IPM/A-2020/41

28.	A. Talebian, A. Nassiri-Rad and H. Firouzjahi Revisiting magnetogenesis during inflation Phys. Rev. D 102 (2020),   [abstract] Code: IPM/A-2020/40

29.	H. Firouzjahi, A. Nassiri-Rad and M. Noorbala Stochastic nonattractor inflation Phys. Rev. D 102 (2020),   [abstract] Code: IPM/A-2020/33

30.	H. Firouzjahi, A. Karami and T . Rostami Vacuum decay in the presence of a cosmic string Phys. Rev. D 101 (2020),   [abstract] Code: IPM/A-2020/12

31.	M .A . Gorji, A. Allahyari, M. Khodadi and H. Firouzjahi Mimetic black holes Phys. Rev. D 101 (2020),   [abstract] Code: IPM/A-2020/08

32.	A. Talebian, A. Nassiri-Rad and H. Firouzjahi Stochastic effects in anisotropic inflation Phys. Rev. D 101 (2020),   [abstract] Code: IPM/A-2019/35

33.	A. Allahyari, H. Firouzjahi and B. Mashhoon Quasinormal modes of generalized black holes: delta-Kerr spacetime Classical Quant. Grav. 37 (2020),   [abstract] Code: IPM/A-2019/27

34.	H. Firouzjahi and B. Mashhoon Twisted gravitational waves in the presence of a cosmological constant Phys. Rev. D 100 (2019),   [abstract] Code: IPM/A-2019/29

35.	M. Noorbala and H. Firouzjahi Boundary crossing in stochastic inflation with a critical number of fields Phys. Rev. D 100 (2019),   [abstract] Code: IPM/A-2019/28

36.	H. Firouzjahi, M. A. Gorji, S.A. Hosseini Mansoori, A. Karami and T. Rostami Charged Vector Inflation Phys. Rev. D 100 (2019),   [abstract] Code: IPM/A-2019/18

37.	M A. Gorji, Sh. Mukohyama and H. Firouzjahi Cosmology in mimetic SU(2) gauge theory JCAP 2019 (2019),   [abstract] Code: IPM/A-2019/08

38.	S. Shakeri, M A. Gorji and H. Firouzjahi Schwinger Mechanism During Inflation Phys. Rev. D 99 (2019),   [abstract] Code: IPM/A-2019/04

39.	B. Salehian and H. Firouzjahi Vacuum decay and bubble nucleation in f(R) gravity Phys. Rev. D 99 (2019),   [abstract] Code: IPM/A-2018/25

40.	H. Firouzjahi, A. Nassiri-Rad and M. Noorbala Stochastic Ultra Slow Roll Inflation JCAP 2019 (2019),   [abstract] Code: IPM/A-2018/24

41.	A. Allahyari, H. Firouzjahi and B. Mashhoon Quasinormal Modes of a Black Hole with Quadrupole Moment Phys. Rev. D 99 (2019),   [abstract] Code: IPM/A-2018/23

42.	A. A. Abolhasani, H. Firouzjahi, A. Naruko and M. Sasaki Basic formulation of delta N formalism world scientific (2019), 184  [abstract] Code: IPM/A-2018/22

43.	M. Noorbala, V. Vennin, H. Assadullahi, H. Firouzjahi and D. Wands Tunneling in stochastic inflation JCAP 2018 (2018),   [abstract] Code: IPM/A-2018/27

44.	H. Firouzjahi, M .A. Gorji, S.A. Hosseini Mansoori, A. Karami and T. Rostami Two-field disformal transformation and mimetic cosmology JCAP 2018 (2018),   [abstract] Code: IPM/A-2018/26

45.	M.A. Gorji, Sh. Mukohyama, H. Firouzjahi and S.A. Hosseini Mansoori Gauge field mimetic cosmology JCAP 2018 (2018),   [abstract] Code: IPM/A-2018/07

46.	M. Zarei, H. Firouzjahi and Sh. Mukohyama Vector disformal transformation of cosmological perturbations Phys. Rev. D 97 (2018),   [abstract] Code: IPM/A-2017/36

47.	M. A. Gorji, S.A. Hosseini Mansoori and H. Firouzjahi Higher Derivative Mimetic Gravity JCAP 2018 (2018),   [abstract] Code: IPM/A-2017/35

48.	H. Firouzjahi, S. Jazayeri, A. Karami and T. Rostami Bubble nucleation and inflationary perturbations JCAP 2017 (2017),   [abstract] Code: IPM/A-2017/34

49.	S. Jazayeri, A. Vafaei Sadr and H. Firouzjahi Primordial anisotropies from cosmic strings during inflation Phys. Rev. D 96 (2017),   [abstract] Code: IPM/A-2017/27

50.	H. Firouzjahi, M A. Gorji and A. Hosseini Mansoori Instabilities in Mimetic Matter Perturbations JCAP 2017 (2017),   [abstract] Code: IPM/A-2017/07

51.	T. Rostami, A. Karami and H. Firouzjahi Effective field theory of statistical anisotropies for primordial bispectrum and gravitational waves JCAP 2017 (2017), 31  [abstract] Code: IPM/A-2017/46

52.	V. Vennin, H. Assadullahi, H. Firouzjahi, M. Noorbala and D. Wands Critical Number of Fields in Stochastic Inflation Phys. Rev. Lett. (2017),   [abstract] Code: IPM/A-2016/12

53.	H. Firouzjahi Primordial Universe Inside the Black Hole and Inflation arXiv (2016), 23  [abstract] Code: IPM/A-2016/27

54.	H. Assadullahi, H. Firouzjahi, M. Noorbala, V. Vennin and D. Wands Multiple Fields in Stochastic Inflation JCAP (2016),   [abstract] Code: IPM/A-2016/13

55.	H. Firouzjahi, A. Karami and T. Rostami Primordial inhomogeneities from massive defects during inflation JCAP (2016),   [abstract] Code: IPM/A-2016/11

56.	A. A. Abolhasani, M. Akhshik, R. Emami and H. Firouzjahi Primordial Statistical Anisotropies: The Effective Field Theory Approach JCAP (2016),   [abstract] Code: IPM/A-2015/22

57.	f. Hassani, Sh. Baghram and H. Firouzjahi Lensing as a Probe of Early Universe: from CMB to Galaxies JCAP 2016 (2016),   [abstract] Code: IPM/A-2015/21

58.	R. Emami and H. Firouzjahi Clustering Fossil from Primordial Gravitational Waves in Anisotropic Inflation JCAP (2015),   [abstract] Code: IPM/A-2015/25

59.	S. Aiola, B. Wang, A. Kosowsky, T. Kahniashvili and H. Firouzjahi Microwave Background Correlations from Dipole Anisotropy Modulation Phys. Rev. D (2015),   [abstract] Code: IPM/A-2015/24

60.	M. Akhshik, H. Firouzjahi and S. Jazayeri Cosmological Perturbations and the Weinberg Theorem JCAP 2015 (2015),   [abstract] Code: IPM/A-2015/23

61.	M. Akhshik, H. Firouzjahi and S. Jazayeri Effective Field Theory of non-Attractor Inflation JCAP (2015),   [abstract] Code: IPM/A-2015/09

62.	H. Assadullahi, H. Firouzjahi, M.H. Namjoo and D. Wands CMB hemispherical asymmetry from non-linear isocurvature perturbations JCAP 2015 (2015), 15  [abstract] Code: IPM/A-2015/08

63.	M.H. Namjoo, A.A. Abolhasani, H. Assadullahi, S. Baghram, H. Firouzjahi and D. Wands Expected dipole asymmetry in CMB polarization JCAP 2015 (2015), 10  [abstract] Code: IPM/A-2015/07

64.	X. Chen, R. Emami, H. Firouzjahi and Y. Wang CMB statistical anisotropies of classical and quantum origins JCAP 2015 (2015), 16  [abstract] Code: IPM/A-2014/12

65.	Sh. Baghram, A. A. Abolhasani, H. Firouzjahi and M.H. Namjoo Fingerprints of Anomalous Primordial Universe on the Abundance of Large Scale Structures JCAP (2014),   [abstract] Code: IPM/A-2014/63

66.	A. A. Abolhasani, S. Baghram, H. Firouzjahi and M.H. Namjoo Asymmetric Sky from the Long Mode Modulations Phys. Rev. D 89 (2014), 16  [abstract] Code: IPM/A-2014/23

67.	A. A. Abolhasani, R. Emami and H. Firouzjahi Primordial Anisotropies in Gauged Hybrid Inflation JCAP 2014 (2014), 21  [abstract] Code: IPM/A-2014/20

68.	R. Emami, H. Firouzjahi and M. Zarei Anisotropic Inflation with the non-Vacuum Initial State Phys. Rev. D (2014),   [abstract] Code: IPM/A-2014/19

69.	H. Firouzjahi and M.H. Namjoo Jump in fluid properties of inflationary universe to reconcile scalar and tensor spectra Phys. Rev. D 90 (2014), 12  [abstract] Code: IPM/A-2014/18

70.	X. Chen, R. Emami, H. Firouzjahi and Y. Wang The TT, TB, EB and BB correlations in anisotropic inflation JCAP (2014), 27  [abstract] Code: IPM/A-2014/17

71.	R. Emami, H. Firouzjahi and Y. Wang Scalar-Tensor Anti-Cross-Correlation does not Help to Reconcile the Tension between BICEP2 and Planck Phys. Rev. D (2014),   [abstract] Code: IPM/A-2014/16

72.	M. Akhshik, R. Emami, H. Firouzjahi and Y. Wang Statistical Anisotropies in Gravitational Waves in Solid Inflation JCAP (Accepted) [abstract] Code: IPM/A-2014/15

73.	M.H. Namjoo, A. Abolhasani, S. Baghram and H. Firouzjahi CMB Hemispherical Asymmetry: Long Mode Modulation and non-Gaussianity JCAP 2014 (2014), 11  [abstract] Code: IPM/A-2014/14

74.	S. Jazayeri, Y. Akrami, H. Firouzjahi, A. R. Solomon and Y. Wang Inflationary power asymmetry from primordial domain walls JCAP 2014 (2014), 22  [abstract] Code: IPM/A-2014/11

75.	H. Firouzjahi, J.O. Gong and M.h. Namjoo Scale-dependent hemispherical asymmetry from general initial state during inflation JCAP 2014 (2014), 16  [abstract] Code: IPM/A-2014/10

76.	H.R. Afshar, H. Firouzjahi and S. Parvizi dS solutions with co-dimension 2 branes in six dimensions Class.Quant.Grav (2013),   [abstract] Code: IPM/A-2014/25

77.	M. Alishahiha, H. Firouzjahi, K. Koyama and M.H. Namjoo Cosmological perturbations in inflationary models with anisotropic space-time scaling in a Lifshitz background Phys. Rev. D (2013),   [abstract] Code: IPM/A-2014/24

78.	X. Chen, H. Firouzjahi, E. Komatsu, M.H. Namjoo and M. Sasaki In-in and δN calculations of the bispectrum from non-attractor single-field inflation JCAP (2013),   [abstract] Code: IPM/A-2014/22

79.	M.H. Namjoo, S. Baghram and H. Firouzjahi Hemispherical Asymmetry and Local non-Gaussianity: a Consistency Condition Phys. Rev. D (2013), 13  [abstract] Code: IPM/A-2013/43

80.	S. Baghram, M.H. Namjoo and H. Firouzjahi Large Scale Anisotropic Bias from Primordial Non-Gaussianity JCAP 2013 (2013),   [abstract] Code: IPM/A-2013/23

81.	C. Xingang, H. Firouzjahi, M.H. Namjoo and M. Sasaki A single field inflation model with large local non-Gaussianity Europhys. Lett. 102 (2013),   [abstract] Code: IPM/A-2012/21

82.	X. Chen, H. Firouzjahi, M.H. Namjoo and M. Sasaki Fluid Inflation JCAP (2013), 13  [abstract] Code: IPM/A-2013/25

83.	H. Assadullahi, H. Firouzjahi, M H. Namjoo and D. Wands Modulated curvaton decay JCAP (2013), 041  [abstract] Code: IPM/A-2012/24

84.	R. Emami and H. Firouzjahi Curvature Perturbations in Anisotropic Inflation with Symmetry Breaking JCAP (2013),   [abstract] Code: IPM/A-2012/017

85.	M H. Namjoo, M. Sasaki and H. Firouzjahi Violation of non-Gaussianity consistency relation in a single field inflationary model Europhys. Lett. 101 (2013), 39001  [abstract] Code: IPM/A-2012/015

86.	H. Firouzjahi, A. Green, K. Malik and M. Zarei The Effect of Curvaton Decay on the Primordial Power Spectrum Phys. Rev. D (2012),   [abstract] Code: IPM/A-2012/014

87.	H. Assadullahi, H. Firouzjahi, M.H. Namjoo and D. Wands Curvaton and the inhomogeneous end of inflation JCAP (2012), 024  [abstract] Code: IPM/A-2012/012

88.	M. Namjoo, H. Firouzjahi and M. Sasaki Multiple Inflationary Stages with Varying Equation of State JCAP (2012), 018  [abstract] Code: IPM/A-2012/012

89.	A. A. Abolhasai, H. Firouzjahi and M. Noorbala Effects of Variable Newton Constant During Inflation Phys. Rev. D 86 (2012),   [abstract] Code: IPM/A-2012/010

90.	A. A. Abolhasani, H. Firouzjahi, Sh. Khosravi and M. Sasaki Local Features with Large Spike non-Gaussianities during Inflation JCAP 11 (2012), 012  [abstract] Code: IPM/P-2012/011

91.	R. Emami and H. Firouzjahi Issues on Primordial Anisotropies Generated at the End of Inflation  (Preprint) [abstract] arXive.org link: arXiv:1111.1919 [ abs, src, ps, others], cited by Code: IPM/P-2011/049

92.	A. A. Abolhasani, H. Firouzjahi and M. Sasaki Curvature Perturbation and Waterfall Dynamics in Hybrid Inflation JCAP 10 (2011), 015  [abstract] arXive.org link: 1106.6315 [ abs, src, ps, others], cited by Code: IPM/P-2011/003

93.	M. Alishahiha, H. Firouzjahi and M.H. Namjoo DBI Lifshitz Inflation JCAP 08 (2011), 028  [abstract] arXive.org link: 1103.2919 [ abs, src, ps, others], cited by Code: IPM/P-2011/006

94.	H. Firouzjahi and S. Khoeini-Moghaddam Fields Annihilation and Particles Creation in DBI Inflation JCAP 1102 (2011), 012  [abstract] arXive.org link: arXiv:1011.4500 [ abs, src, ps, others], cited by Code: IPM/P-2010/047

95.	A.A. Abolhasani, H. Firouzjahi and M.H. Namjoo Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation Classical Quant. Grav. 28 (2011), 075009   [abstract] arXive.org link: arXiv:1010.6292 [ abs, src, ps, others], cited by Code: IPM/P-2010/044

96.	R. Emami, H. Firouzjahi, S.M.S. Movahed and M. Zarei Anisotropic Inflation from Charged Scalar Fields JCAP 1102 (2011), 005   [abstract] arXive.org link: arXiv:1010.5495 [ abs, src, ps, others], cited by Code: IPM/P-2010/043

97.	A.A. Abolhasani and H. Firouzjahi No Large Scale Curvature Perturbations during Waterfall of Hybrid Inflation Phys. Rev. D 83 (2011), 063513   [abstract] arXive.org link: arXiv:1005.2934 [ abs, src, ps, others], cited by Code: IPM/P-2010/018

98.	F. Firouzjahi, S. Khoeini-Moghaddam and S. Khosravi Cosmic Strings Collision in Cosmological Backgrounds Phys. Rev. D 81 (2010), 123506  [abstract] arXive.org link: arXiv:1004.0068 [ abs, src, ps, others], cited by Code: IPM/P-2010/019

99.	D . Battefeld, T. Battefeld, H. Firouzjahi and N. Khosravi Brane Annihilations during Inflation JCAP 07 (2010), 009  [abstract] arXive.org link: arXiv:1004.1417 [ abs, src, ps, others], cited by Code: IPM/P-2010/013

100.	A.A. Abolhasani, H. Firouzjahi and M.M. Sheikh-Jabbari Tachyonic Resonance Preheating in Expanding Universe Phys. Rev. D 81 (2010), 043524  [abstract] Code: IPM/P-2009/052

101.	A. Ashoorioon,, H. Firouzjahi and M.M. Sheikh-Jabbari Matrix Inflation and the Landscape of its Potential JCAP 05 (2010), 002  [abstract] arXive.org link: arXiv:0911.4284 [ abs, src, ps, others], cited by Code: IPM/P-2009/049

102.	R. Emami, H. Firouzjahi and M. Sadegh Movahed Inflation from Charged Scalar and Primordial Magnetic Fields? Phys. Rev. D 81 (2010), 083526  [abstract] arXive.org link: arXiv:0908.4161 [ abs, src, ps, others], cited by Code: IPM/P-2009/044

103.	H. Firouzjahi, J. Karouby, S. Khosravi and R. Brandenberger Zipping and Unzipping of Cosmic String Loops in Collision Phys. Rev. D 80 (2009), 083508  [abstract] arXive.org link: arXiv:0907.4986 [ abs, src, ps, others], cited by Code: IPM/P-2009/043

104.	A. Ashoorioon , H. Firouzjahi and M.M. Sheikh-Jabbari M-Flation: Inflation From Matrix Valued Scalar Fields JCAP 06 (2009), 018  [abstract] arXive.org link: arXiv:0903.1481 [ abs, src, ps, others], cited by Code: IPM/P-2009/009

105.	R. Brandenberger, H . Firouzjahi, J. Karouby and S. Khosravi Gravitational Radiation by Cosmic Strings in a Junction JCAP 01 (2009), 008  [abstract] arXive.org link: arXiv:0810.4521 [ abs, src, ps, others], cited by Code: IPM/P-2008/060

106.	F . Chen and H. Firouzjahi Dynamics of D3-D7 Brane Inflation in Throats JHEP 11 (2008), 017  [abstract] arXive.org link: arXiv:0807.2817 [ abs, src, ps, others], cited by Code: IPM/P-2008/059