Title
Modified Theories of Gravity: Traversable Wormholes,Used
Delivery time: 8-12 business days (International)
In recent years, the overwhelming amount of observational data supporting the emph{latetime accelerated expansion of the Universe} has thrusted cosmology in particular and gravitation in general to the forefront of scientific research. In fact, the problem of the origin of the so called emph{dark energy}, stands as one of the most tantalizing scientific issues of today's theoretical investigations, both in the field of fundamental physics and in that of astrophysics. In this context, note must be given to the appearance of modifications of Einstein's General Relativity, especially designed to deal with this problem, although simultaneously addressing other inconsistencies of the standard view of gravity, such as the dark matter problem and inflation. This is the case of the scalartensor theories of gravity and the $f(R)$ modified theories of gravity. In this work, we consider these modifications, but focus on the existence of a specific type of exact solution: traversable wormholes. These are hypothetical tunnels in spacetime, and are primarily useful as gedankenexperiments" and as a theoreticians probe of the foundations of general relativity, although their existence as
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Shipping & Returns
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We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.