All articles starting with E

Erasure conversion

Erasure conversion is a quantum error correction technique that engineers qubit errors into detectable erasures at known locations; demonstrated in neutral atoms, trapped ions, superconducting circuits, and molecules.

Erasure conversion in neutral-atom qubits

Erasure conversion in neutral-atom qubits is a set of techniques that turns atom-loss and leakage errors into erasures, errors at known locations that are far easier for a decoder to correct.

Erasure correction

Erasure correction is the branch of quantum error correction that protects quantum information against erasure errors, faults whose location is known even though the error's effect is not.

Erasure qubit

An erasure qubit is a quantum bit engineered so its dominant error, such as photon loss, becomes a heralded erasure whose location is known, simplifying quantum error correction.

Eratigena

Eratigena, anagram of Tegenaria, is a genus of Agelenidae funnel-web spiders erected by Bolzern, Burckhardt and Hänggi in 2013; type species the giant house spider Eratigena atrica, also including the hobo spider E. agrestis.

Eratigena atrica

Eratigena atrica, the Giant House Spider (formerly Tegenaria atrica), a large European funnel-web spider (Agelenidae) introduced to North America; type species of genus Eratigena, split into three species in 2018.

Eratosthenes (Ἐρατοσθένης)

Eratosthenes (Ἐρατοσθένης) of Cyrene, c. 276 to 194 BC, was a Greek scholar who led the Library of Alexandria, measured the Earth's circumference, and devised the Sieve of Eratosthenes for finding prime numbers.

Eratrectinib

Anrotinib (Willcell TRK inhibitor) denotes eratrectinib (安瑞曲替尼, VC004, brand Weimaituo), Jiangsu Vcare's next-generation pan-TRKA/B/C inhibitor for NTRK fusion solid tumors, conditionally approved in China June 2026 at 50 mg twice daily.

Eravacycline

Eravacycline (Xerava) is a fully synthetic fluorocycline tetracycline antibiotic approved in 2018 for complicated intra-abdominal infections in adults, dosed 1 mg/kg IV every 12 hours, with activity against multidrug-resistant Gram-negative bacteria but not cUTI.

Erawan Oil and Gas Field

The Erawan gas field (แหล่งเอราวัณ) is an offshore natural gas field in the Pattani Trough of the Gulf of Thailand, discovered in 1972 and producing Thailand's first petroleum in 1981.

Erawan-Rayon Gas Pipeline 1

The Erawan-Rayon Gas Pipeline 1 is a 415 km, 34-inch offshore gas pipeline carrying natural gas from the Erawan field in the Gulf of Thailand to Rayong, commissioned in 1981.

Erawan-Rayon Gas Pipeline 2

Erawan-Rayon Gas Pipeline 2 is a 36-inch offshore gas pipeline owned by PTT, running from the Erawan field in the Gulf of Thailand to Rayong, in service since 1996–1997.

Erawan-Rayon Gas Pipeline 3

The Erawan-Rayon Gas Pipeline 3 is a 414 km natural gas pipeline in Thailand, owned by PTT, carrying gas from the Erawan field in the Gulf of Thailand to Rayong.

Erb's palsy

Erb paralysis (Erb's palsy, Erb-Duchenne paralysis) is upper-arm weakness from C5–C6 upper trunk brachial plexus injury, mostly at birth; ~90% of neonatal brachial plexus palsies, often with shoulder dystocia, usually recovering in 3–4 months.

ERBB2

ERBB2, also called HER2 or neu, is a human chromosome 17 gene encoding an EGFR-family receptor tyrosine kinase; its amplification defines HER2-positive breast cancer and drove trastuzumab development.

ERBB3

ERBB3 (HER3, erb-b2 receptor tyrosine kinase 3), 12q13.2, is a kinase-impaired ERBB family receptor binding neuregulins, signaling via ERBB2 heterodimers and PI3K/Akt, and driving cancer and resistance.

ERBB4

ERBB4 (HER4) is a human ERBB-family receptor tyrosine kinase gene at 2q34 with seven ligands, four splice isoforms, nuclear intracellular-domain signaling, and an ambiguous, context-dependent role in cancer.

Erben Wennemars

Erben Wennemars (born 1975, Dalfsen) is a Dutch former long-track speed skater, two-time world sprint champion (2004, 2005) and double Olympic bronze medalist at Turin 2006 in the 1000 m and team pursuit; father of skater Joep Wennemars.

Erbil

Erbil (Hawler/Hewlêr), capital of Iraq's Kurdistan Region, is one of the world's oldest continuously inhabited cities, built around the Erbil Citadel tell, ancient Arbela, a UNESCO World Heritage Site inscribed in 2014.

Sep 19, 2026

Erbil Citadel

The Citadel of Erbil, also called the Citadel of Arbil, is an inhabited mound at the center of Erbil, Iraq, occupied since the 5th millennium BC.

ERBIN

ERBIN (ERBB2IP, LAP2) is a human LAP-family scaffold gene at 5q12.3 whose PDZ-domain protein binds unphosphorylated ERBB2/HER2, stabilizes it via HSP90, and regulates Ras and TGF-beta signaling.

Erbium

Erbium is a chemical element with the symbol Er and atomic number 68, a soft silvery lanthanide metal used in fiber optic amplifiers, dermatology lasers, and pink glass.

Erbium telecom qubit

An erbium telecom qubit is a quantum bit based on the erbium ion in a solid, whose light emission sits in the telecom C-band where fiber loses least.

Erbium-doped fiber

Erbium-doped fiber is optical fiber doped with erbium ions to provide optical gain, best known as the gain medium of the erbium-doped fiber amplifier, first demonstrated in 1987.

Erbium-doped fiber amplifier

An erbium-doped fiber amplifier (EDFA) is an optical amplifier that boosts light signals in erbium-doped fiber near 1.55 µm without converting them to electricity, enabling WDM amplification.

Erbium-doped silicon

Erbium in silicon is the incorporation of erbium ions into crystalline silicon, emitting at 1.54 μm, a wavelength in the low-loss window of silica optical fiber.

Erbium-ytterbium co-doped fiber amplifier

An erbium-ytterbium co-doped fiber amplifier (EYDFA) is an optical fiber amplifier that amplifies signals near 1550 nm using ytterbium to absorb pump light and transfer energy to erbium.

Erbium–ytterbium co-doped fiber

An erbium–ytterbium co-doped fiber (EYDF) is an optical fiber whose core is doped with erbium and ytterbium ions, so ytterbium absorbs pump light and transfers the energy to erbium for amplification near 1.5 µm.

Oct 20, 2026

ERCC1

ERCC1, or excision repair cross complementation group 1, is a human gene on chromosome 19 encoding a subunit of the ERCC1-XPF enzyme that repairs DNA damage, first cloned in 1984.