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The Physicist Who Measured Negative Time

2:21:30 4/19/2026 Theories of Everything🇮🇱 Subtitled

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Original title

הפיזיקאי שמדד זמן שלילי

בפרק המרתק שלפנינו, אנו צוללים אל אחד מהניסויים המחשבתיים והפיזיקליים המערערים ביותר של העת האחרונה: האפשרות המדעית של "זמן שלילי". בעוד שבחיי היומיום אנו רגילים לתפוס את הזמן כחץ הנע בכיוון אחד בלבד – מהעבר אל העתיד – הפיזיקה הקוונטית ממשיכה להוכיח שהמציאות ברמה התת-אטומית מוזרה הרבה יותר ממה שניתן לדמיין. נארח את הפיזיקאי החלוץ שהצליח למדוד רגעים שבהם נדמה כי חלקיקים יוצאים ממערכת עוד לפני שהם נכנסו אליה, ומעמידים למבחן את עקרון הסיבתיות הקלאסי. המושג של זמן שלילי קשור קשר הדוק לתופעה של "מנהור קוונטי" (Quantum Tunneling). זהו מצב שבו חלקיק מצליח לעבור דרך מחסום אנרגטי שלפי חוקי הפיזיקה הניוטונית אמור להיות בלתי עביר. הניסוי המדובר בוחן כמה זמן שוהה הפוטון בתוך המחסום, והתוצאות המדהימות מראות כי במקרים מסוימים, הערך המתקבל הוא שלילי. המשמעות היא לאו דווקא חזרה בזמן כפי שרואים בסרטי מדע בדיוני, אלא הוכחה לכך שהתכונות הקוונטיות של חלקיקים מאפשרות להם להתקיים במצבים שאינם מצייתים לסדר הזמנים הליניארי שאנו מכירים. מעבר למדידות המעבדה, הדיון מעלה שאלות פילוסופיות ותיאורטיות רחבות על מהות המציאות. אם הזמן אינו זורם באותו אופן עבור כל חלקיק, מה זה אומר על היכולת שלנו לנבא את העתיד או להבין את העבר? השיחה מתמקדת בהשלכות של גילויים אלו על המחשוב הקוונטי, על תורת האינפורמציה ועל הניסיון לאחד בין תורת היחסות הכללית לבין המכניקה הקוונטית – ה"גביע הקדוש" של הפיזיקה המודרנית. סרטון זה הופק בשיתוף עם נותני החסות שלנו: - בקרו בכתובת https://expressvpn.com/theoriesofeverythingyt כדי לגלות איך תוכלו לקבל עד 4 חודשים נוספים במתנה באדיבות ExpressVPN. הגנו על הפרטיות שלכם ברשת ותיהנו מגלישה בטוחה ומהירה מכל מקום בעולם. - שדרגו את היעילות שלכם והאיצו את תהליכי העבודה. הירשמו ל-[שם השירות] כדי לייעל את ניהול המשימות והפרויקטים שלכם בעזרת הכלים המתקדמים ביותר בשוק.

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