IPM Positions

Head, School of Astronomy (2017 - Present ) Professor, School of Astronomy (2012 - Present)

Past IPM Positions

Faculty Member , School of Physics (2008 - 2012)

Research Interests

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

Related Papers

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

2.	Sina . Hooshangi, Alireza . Talebian, Mohammad Hossein . Namjoo and Hassan . 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

3.	Alireza . Talebian, Amin . Nassiri-Rad and Hassan . Firouzjahi Stochastic Effects in Axion Inflation and Primordial Black Holes Formation Phys. Rev. D 105 (2022),   [abstract] Code: IPM/A-2022/12

4.	Hassan . Firouzjahi, Mohammad Ali . Gorji, Shinji . Mukohyama and Alireza . Talebian Dark matter from entropy perturbations in curved field spac Phys. Rev. D 105 (2022),   [abstract] Code: IPM/A-2022/11

5.	Hassan . Firouzjahi, Mohammad Ali . Gorji, Shinji . Mukohyama and Borna . Salehian Dark photon dark matter from charged inflaton Journal of High Energy Physics (JHEP) (2021),   [abstract] Code: IPM/A-2021/13

6.	Borna . Salehian, Mohammad Ali . Gorji, Hassan . Firouzjahi and Shinji . Mukohyama Vector dark matter production from inflation with symmetry breaking Phys. Rev. D 103 (2021),   [abstract] Code: IPM/A-2021/09

7.	Seyed Ali . Hosseini Mansoori, Alireza . Talebian and Hassan . Firouzjahi Mimetic Inflation Journal of High Energy Physics (JHEP) (2021),   [abstract] Code: IPM/A-2020/38

8.	Mohammad Ali . Gorji, Seyed Ali . Hosseini Mansoori and Hassan . Firouzjahi Inflation with multiple vector fields and non-Gaussianities JCAP 2020 (2020),   [abstract] Code: IPM/A-2020/41

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

10.	Hassan . Firouzjahi, Amin . Nassiri-Rad and Mahdiyar . Noorbala Stochastic nonattractor inflation Phys. Rev. D 102 (2020),   [abstract] Code: IPM/A-2020/33

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

12.	Mohammad Ali . Gorji, Alireza . Allahyari, Mohsen . Khodadi and Hassan . Firouzjahi Mimetic black holes Phys. Rev. D 101 (2020),   [abstract] Code: IPM/A-2020/08

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

14.	Alireza. Allahyari, Hassan. Firouzjahi and Bahram . Mashhoon Quasinormal modes of generalized black holes: δ-Kerr spacetime Classical Quant. Grav. 37 (2020),   [abstract] Code: IPM/A-2019/27

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

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

17.	Hassan . Firouzjahi, Mohammad Ali . Gorji, Seyed Ali . Hosseini Mansoori, Asieh . Karami and Tahereh . Rostami Charged Vector Inflation Phys. Rev. D 100 (2019),   [abstract] Code: IPM/A-2019/18

18.	Mohammad Ali . Gorji, Shinji . Mukohyama and Hassan . Firouzjahi Cosmology in mimetic SU(2) gauge theory JCAP 2019 (2019),   [abstract] Code: IPM/A-2019/08

19.	Soroush . Shakeri, Mohammad Ali . Gorji and Hassan . Firouzjahi Schwinger Mechanism During Inflation Phys. Rev. D 99 (2019),   [abstract] Code: IPM/A-2019/04

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

21.	Hassan. Firouzjahi, Amin. Nassiri-Rad and Mahdiyar. Noorbala Stochastic Ultra Slow Roll Inflation JCAP 2019 (2019),   [abstract] Code: IPM/A-2018/24

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

23.	Ali Akbar. Abolhasani, Hassan. Firouzjahi, Atsushi. Naruko and Misao. Sasaki Basic formulation of δN formalism world scientific (2019), 184  [abstract] Code: IPM/A-2018/22

24.	Mahdiyar. Noorbala, Vincent . Vennin, Hooshyar. Assadullahi, Hassan. Firouzjahi and David . Wands Tunneling in stochastic inflation JCAP 2018 (2018),   [abstract] Code: IPM/A-2018/27

25.	Hassan. Firouzjahi, Mohammad Ali. Gorji, Seyed Ali . Hosseini Mansoori, Asieh. Karami and Tahereh. Rostami Two-field disformal transformation and mimetic cosmology JCAP 2018 (2018),   [abstract] Code: IPM/A-2018/26

26.	Mohammad Ali. Gorji, Shinji. Mukohyama, Hassan. Firouzjahi and Seyed Ali. Hosseini Mansoori Gauge field mimetic cosmology JCAP 2018 (2018),   [abstract] Code: IPM/A-2018/07

27.	Moslem. Zarei, Hassan. Firouzjahi and Shinji. Mukohyama Vector disformal transformation of cosmological perturbations Phys. Rev. D 97 (2018),   [abstract] Code: IPM/A-2017/36

28.	Mohammad Ali. Gorji, Seyed Ali . Hosseini Mansoori and Hassan. Firouzjahi Higher Derivative Mimetic Gravity JCAP 2018 (2018),   [abstract] Code: IPM/A-2017/35

29.	Hassan. Firouzjahi, Sadra. Jazayeri, Asieh. Karami and Tahereh. Rostami Bubble nucleation and inflationary perturbations JCAP 2017 (2017),   [abstract] Code: IPM/A-2017/34

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

31.	Hassan. Firouzjahi, Mohammad Ali. Gorji and Ali. Hosseini Mansoori Instabilities in Mimetic Matter Perturbations JCAP (Submitted) [abstract] Code: IPM/A-2017/07

32.	Sadra. Jazayeri, Alireza. Vafaei Sadr and Hassan. Firouzjahi Primordial anisotropies from cosmic strings during inflation Phys. Rev. D (Submitted) [abstract] Code: IPM/A-2017/06

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

34.	Vincent. Vennin, Hooshyar. Assadullahi, Hassan. Firouzjahi, Mahdiyar. Noorbala and David. Wands Critical Number of Fields in Stochastic Inflation Phys. Rev. Lett. (2017),   [abstract] Code: IPM/A-2016/12

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

36.	Hooshyar. Assadullahi, Hassan. Firouzjahi, Mahdiyar. Noorbala, Vincent. Vennin and David. Wands Multiple Fields in Stochastic Inflation JCAP (2016),   [abstract] Code: IPM/A-2016/13

37.	Hassan. Firouzjahi, Asieh. Karami and Tahereh. Rostami Primordial inhomogeneities from massive defects during inflation JCAP (2016),   [abstract] Code: IPM/A-2016/11

38.	AliAkbar. Abolhasani, Mohammad. Akhshik, Razieh. Emami and Hassan. Firouzjahi Primordial Statistical Anisotropies: The Effective Field Theory Approach JCAP (2016),   [abstract] Code: IPM/A-2015/22

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

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

41.	Simone. Aiola, Bingjie. Wang, Arthur. Kosowsky, Tina. Kahniashvili and Hassan. Firouzjahi Microwave Background Correlations from Dipole Anisotropy Modulation Phys. Rev. D (2015),   [abstract] Code: IPM/A-2015/24

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

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

44.	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

45.	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

46.	Xingang. Chen, Razieh. Emami, Hassan. Firouzjahi and Yi. Wang CMB statistical anisotropies of classical and quantum origins JCAP 2015 (2015), 16  [abstract] Code: IPM/A-2014/12

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

48.	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

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

50.	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

51.	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

52.	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

53.	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

54.	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

55.	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

56.	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

57.	H. Firouzjahi, J. - Ouk 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

58.	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

59.	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

60.	X. Chen, H. Firouzjahi, Eiichiro. 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

61.	A. Abolhasani, R. Emami, J. T. Firouzjaee and H. Firouzjahi δN formalism in anisotropic inflation and large anisotropic bispectrum and trispectrum JCAP (2013),   [abstract] Code: IPM/A-2013/34

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

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

64.	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

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

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

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

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

69.	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

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

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

72.	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

73.	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

74.	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

75.	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

76.	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

77.	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

78.	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

79.	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

80.	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

81.	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

82.	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

83.	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

84.	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

85.	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

86.	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

87.	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

88.	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

89.	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